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Roll film

Roll film is a flexible, light-sensitive photographic medium consisting of a continuous strip of emulsion-coated material wound onto a spool, enabling multiple exposures on a single length of film within a camera, in contrast to individual sheets or glass plates. Invented by George Eastman, the first practical roll film was introduced in 1885 as a paper-based strip coated with silver bromide emulsion, designed to fit into existing dry-plate cameras via a roll holder that allowed spooling and unspooling for sequential exposures. This paper roll film powered the debut of the Kodak No. 1 camera in 1888, a simple, fixed-focus box camera pre-loaded with 100-exposure rolls of film, which users mailed back to Kodak for processing under the slogan "You press the button, we do the rest," thereby making photography portable, affordable, and accessible to amateur users without technical expertise. In 1889, Eastman, in collaboration with chemist Henry Reichenbach, improved the technology to produce transparent nitrocellulose film—created by dissolving nitrocellulose in a camphor solution—coated with a light-sensitive gelatin emulsion, which eliminated the need to strip the emulsion from paper and provided higher image quality after development. The widespread adoption of roll film revolutionized consumer photography, sparking a "snapshot" craze, with over 1.5 million roll-film cameras in use by 1898 and enabling the documentation of everyday personal events through family albums and amateur clubs.

Overview

Definition and Basics

Roll film is a form of consisting of a flexible strip of material coated with a light-sensitive , wound onto a spool. This design allows the film to be loaded into cameras in daylight and advanced frame by frame for sequential exposures, facilitating multiple images on a single continuous strip. The basic structure of roll film includes a flexible , usually made of or , which provides support and flexibility. On one side of this base is the layer, a gelatin-based containing crystals that react to light to form a . Protective layers, such as an and a supercoat, are applied to prevent light scatter and scratches, respectively. Unlike sheet film, which consists of individual flat sheets loaded one at a time into cameras—often for large-format —roll film enables multiple exposures without reloading, promoting portability and efficiency in capturing images. Roll film originated in the late as a convenient alternative to cumbersome glass plates, which were heavy and prone to breakage. Common formats include 35mm for standard cameras and 120 for medium-format systems.

Key Characteristics

Roll film features a flexible base, typically made from or , which enables it to be tightly coiled around spools inside compact cameras without damage or distortion. Common widths include for small-format applications and about 61 mm for medium-format 120 rolls, with the latter adhering to ISO standards of 60.7 to 61.7 mm to ensure compatibility across devices. Standard roll lengths vary by format; a roll typically accommodates 36 exposures, spanning roughly 1.65 meters of usable film, while a 120 roll provides around 820 mm for 12 to 16 exposures depending on frame size. Operationally, roll film employs light-tight spools or cassettes that permit daylight loading and unloading, reducing the need for conditions and enhancing user convenience. In formats, perforations along both edges, spaced at a 4.75 mm pitch, facilitate precise film advance via sprockets in camera mechanisms. Medium-format rolls, such as 120, incorporate opaque backing paper that protects the light-sensitive during handling, winding, and exposure counting, with printed numbers on the paper reverse indicating frame positions for different aspect ratios. Key advantages of roll film lie in its portability and reduced weight relative to rigid glass plates, allowing photographers greater mobility in , alongside cost savings from exposing multiple images per roll rather than plates. Its design also supports efficient , lowering manufacturing and distribution expenses compared to plate processing. On the downside, improper handling—such as accidental during mid-roll changes—can cause fogging across unexposed frames, degrading . Additionally, each roll format imposes fixed aspect ratios based on camera design, limiting compositional flexibility without cropping or remounting.

History

Invention and Early Adoption

The invention of roll film marked a pivotal shift in , replacing cumbersome glass plates with a more portable alternative. In 1885, introduced paper-based roll film, consisting of a coated on that could be peeled off after exposure to create the negative. This innovation, developed through Eastman's Eastman Dry Plate and Film Company, allowed for multiple exposures on a single roll, adaptable to existing cameras via a roll holder. The paper film addressed the limitations of glass plates by enabling easier handling and transport, though it retained some processing complexities. Building on this foundation, Eastman advanced to a more durable medium with the first flexible film on a celluloid base in 1889, perfected by his chief chemist Henry Reichenbach. Although pioneered by inventor Hannibal Goodwin, whose 1887 patent for a celluloid film base was granted in 1898 after his death, leading to a successful infringement lawsuit against Kodak settled for $5 million in 1913, Eastman's transparent nitrocellulose film eliminated the need to strip the emulsion from paper, providing a smoother, more reliable support for the light-sensitive layer. The transition was driven by the shortcomings of paper film, which was prone to curling during handling and fading over time due to its organic base. Celluloid's toughness and clarity significantly improved image quality and longevity, setting the stage for widespread photographic use. Early adoption of roll film was spearheaded by the 1888 introduction of the No. 1 box camera, a simple, handheld device preloaded with 100 exposures of paper-based film, priced at $25. Marketed with the slogan "You press the button, we do the rest," it emphasized user-friendliness, as users mailed the entire camera to Kodak for processing and reloading for $10, bypassing the need for expertise. Initially appealing to amateurs seeking casual snapshots, the system gained traction in the , fueling a boom in personal that documented without professional skills. By 1898, over 1.5 million roll-film cameras were in use, transforming from an elite pursuit to a popular hobby.

Evolution and Standardization

In the early , advancements in roll film loading mechanisms addressed the challenges of dependency, with introducing daylight-loading spools around 1900 that allowed users to load film in ordinary light using opaque backing paper. This innovation built on earlier roll film concepts and facilitated broader amateur adoption by simplifying the process. Concurrently, safety concerns with flammable bases prompted a shift to , first commercially offered by in 1910 as a non-flammable alternative for motion picture and applications. The 1920s and 1930s marked significant format developments that standardized roll film for diverse camera designs. In 1925, the Leica I camera, unveiled at the Spring Trade Fair, popularized the use of perforated 35mm cinema film for compact , enabling the 24x36mm miniature and revolutionizing portable imaging. Meanwhile, formalized the 120 roll film in 1901 for its No. 2 camera, providing a medium- option with backing paper for 6x9cm images, which evolved into the 620 format in 1931 through a redesigned, narrower metal spool for improved camera compatibility while maintaining the same film width. Mid- to late-20th-century innovations focused on automation and user convenience in roll film handling. Kodak introduced DX (Digital Index) coding in 1983, a standardized barcode system on 35mm film cassettes that encoded ISO speed and exposure count for automatic camera readout, reducing manual errors in exposure settings. In 1996, the Advanced Photo System (APS), developed by a consortium including Kodak, launched as a cartridge-based 24mm format with magnetic data storage for print options and error protection, though it saw limited long-term adoption due to the rise of digital alternatives. By the 1970s, international norms solidified roll film's interoperability through ISO standards, such as ISO 732 published in 1975, which specified dimensions for 120, , and related formats including spools and backing to ensure consistent manufacturing and global exchangeability. These standards extended to emulsion characteristics, with ISO 6 (1974) defining sensitivity measurement for films, promoting uniform quality across producers and enabling widespread interchangeable use in professional and consumer .

Formats and Types

35mm Format

The 35mm format, designated as , utilizes a strip of 35-millimeter-wide perforated wound onto a 135 , which protects the from light exposure during loading and unloading. The standard frame size measures 24 mm by 36 mm, allowing for typically 36 exposures per roll after accounting for leader and trailer sections. This configuration provides a balance of image quality suitable for consumer and professional use, with the perforations enabling accurate frame registration and transport within cameras. Originally developed in the late for motion picture applications, 35mm film was adapted for around 1913 when created prototype cameras using cinema at Leitz in . Commercial adoption accelerated with the introduction of the I rangefinder camera in 1925, which employed 35mm film in a compact, portable design and established the format as a standard for . Between 1925 and 1930, approximately 57,000 Leica I units were produced, driving widespread acceptance of 35mm among for its convenience over larger sheet or roll films. Variations of the 35mm format include half-frame photography, which exposes an 18 mm by 24 mm area—half the standard size—yielding up to 72 exposures per roll and appealing to users seeking economy or extended shooting sessions. This approach, popularized by cameras like the series starting in 1959, reorients the film vertically relative to the standard horizontal run. Another variation involves bulk loading, where photographers manually wind bulk rolls of unexposed 35mm film into reusable cassettes to create custom lengths, often for cost savings or specialized applications like extended sequences in fieldwork. The 35mm format significantly influenced camera design by enabling the development of compact single-lens reflex (SLR) cameras, such as the 1936 Ihagee , which offered through-the-lens viewing in a smaller body than medium-format alternatives. From the 1930s onward, affordable 35mm models like the Kodak Retina series democratized , with Japanese manufacturers expanding access in the post-World War II era through rangefinders and SLRs. By the and , automation features in 35mm cameras—such as autofocusing and built-in flash—dominated consumer markets, with millions of units sold annually until the 1990s transition to . As of 2025, 135 film remains one of the most widely produced and used roll film formats for both amateur and professional photography.

Medium Format Rolls

Medium format roll films, such as the widely used 120 type, feature a film width of 61.5 mm, including an opaque backing paper that protects the emulsion from exposure and aids in frame alignment during loading. This backing paper is integral to the format, allowing manual advancement in cameras without built-in metering. Common image formats exposed on 120 film include 6×6 cm (square, popularized by Hasselblad cameras), 6×7 cm (rectangular for broader aspect ratios), and 6×9 cm (panoramic-style for expansive scenes), with the usable image area typically measuring around 56 mm in width to account for margins. These formats yield 12 to 16 exposures per standard 120 roll, depending on the frame size selected by the camera's mask. The 120 format was introduced by in 1901 specifically for the No. 2 camera, marking a shift toward accessible roll film for amateur photographers and replacing glass plates with a more portable medium. By the , 120 film saw widespread adoption in folding bellows cameras, such as Kodak's Folding Pocket models, which offered higher resolution negatives compared to earlier formats and enabled compact yet high-quality imaging for portable use. A related variant, 220 film, maintains the same 61.5 mm width but doubles the length to approximately 3.6 meters, eliminating the backing paper along the emulsion length to accommodate up to 24–32 exposures while reducing bulk. Historical variations include the 116 and 616 formats, both using 70 mm wide on larger spools for image sizes around 2.5×4.25 inches (616) or similar, introduced by in the early for postcard-sized prints but discontinued in 1984 due to declining demand. Another simplified medium roll variant was the 126 Instamatic cartridge, launched by in 1963 as a user-friendly, drop-in with 35 mm wide film and square 26.5×26.5 mm frames, producing about 20 exposures per cartridge until its discontinuation around 1988. These formats catered to evolving camera designs but were eventually overshadowed by standardized 120 production. The primary advantages of rolls stem from their larger negative areas—up to 2.25 times that of —which capture finer grain and greater tonal detail, making them ideal for professional studio portraiture where enlargement potential is key, and requiring expansive . This enhanced resolution supports cropping and printing at sizes beyond typical consumer needs without visible quality loss. As of 2025, continues to be produced and remains popular for among enthusiasts and professionals.

Technical Aspects

Film Construction

Roll film is constructed from multiple layered components designed to light-sensitive while ensuring durability and quality. The foundational layer is the film base, a flexible transparent typically 0.1 to 0.2 mm thick, which provides mechanical stability during exposure, processing, and handling. Early bases were made of cellulose nitrate from until the , valued for its clarity but prone to flammability and . This was superseded by cellulose acetate starting in the as a safer alternative, with diacetate initially and triacetate introduced in the for enhanced dimensional stability and resistance to shrinkage. Modern roll films predominantly use () bases, adopted since 1955 for superior strength, minimal warping, and thinner profiles that allow more exposures per roll without increasing bulk. Atop the base sits the emulsion layer, a thin coating of gelatin embedded with light-sensitive silver halide crystals (primarily silver bromide or chloride), which capture the latent image upon exposure. Beneath the emulsion lies the anti-halation underlayer, often containing light-absorbing dyes or pigments, which prevents stray light from reflecting back through the base and causing halos or blurred edges in the image. On the emulsion's surface, a supercoat of hardened gelatin serves as a protective barrier against scratches, abrasions, and chemical damage during development. The reverse side of the base features an anti-curl layer, typically a thin gelatin coating, to counteract the natural tendency of the emulsion side to contract and curl the film strip. Manufacturing begins with producing the base as wide webs, onto which the is precisely coated using automated machines that apply molten gelatin- mixtures in controlled thicknesses. These coated webs, often meters wide, are dried in climate-controlled chambers before additional layers like the anti-halation and supercoat are applied. The large sheets are then slit into narrower rolls using razor-sharp blades and spooled onto cores or cassettes under conditions to prevent premature exposure. Emulsion formulations are tuned for specific sensitivities: films use panchromatic crystals responsive across the , while color films incorporate multiple layered emulsions with spectral sensitizers for red, green, and blue channels, processed via the C-41 method for negative images. The evolution of film construction prioritized safety and efficiency, with cellulose nitrate's high flammability—responsible for numerous studio fires—prompting the rapid adoption of acetate bases as "safety film" by the 1920s. Triacetate in the 1950s improved resistance to processing chemicals and environmental factors, reducing brittleness. Polyester's introduction enabled even thinner bases (down to 0.1 mm), facilitating longer rolls with up to 36 exposures in 35 mm formats compared to earlier thicker stocks limited to 24 or fewer. These advancements in base materials and layer optimization directly influence ISO speed ratings by improving light transmission and emulsion uniformity, though detailed sensing mechanisms are addressed separately.

Speed Sensing and Coding

The ISO speed rating measures a photographic film's to light, indicating how much exposure is required to produce an acceptable image density. Common values for roll film range from ISO 100 to ISO 800, balancing , , and versatility for various lighting conditions. This system originated from the unification of the American Standards Association (ASA) arithmetic scale and the Deutsche Industrie Norm (DIN) into a single in , as defined in the initial version of ISO 6. Before automated detection became widespread, photographers relied on manual film speed setting, where the ISO value printed on the cassette or packaging was entered directly into the camera's metering system to calibrate exposure calculations. Errors in this manual process, such as misreading the speed or failing to adjust for specific conditions, often resulted in overexposure (too much light, leading to washed-out highlights and reduced contrast) or underexposure (insufficient light, causing dense shadows and loss of detail). For earlier cartridge formats like 126 introduced by in the 1960s, speed sensing used mechanical es on the cartridge edge; cameras equipped with a sensing would detect the notch position to automatically adjust the shutter or for speeds such as ISO 64, 80, 125, or 160, though most such cameras were fixed for ISO 80 and lacked variable detection. The 110 format, introduced in the 1970s, used a simpler molded tab on the cartridge to indicate low (e.g., ISO 100) or high (e.g., ISO 400) speed settings for compatible cameras. In the 1980s, DX (Digital indeX) coding revolutionized automatic speed sensing for 35mm roll film, introduced by in March 1983 as an open, royalty-free standard adopted industry-wide. This system features a pattern of 12 conductive and non-conductive areas printed on the film's 135 cassette in two rows of six, read by electrical contacts in compatible cameras to encode the ISO speed (using the right column's binary-like configuration for values from ISO 25/15° to ISO 5000/38°), the number of s (typically 12, 24, or 36), and latitude tolerances. By ensuring the camera's uses the precise film sensitivity, DX coding minimizes errors that could otherwise cause over- or underexposure by one to three stops, preserving without . An earlier precursor appeared in 1977 when Fuji implemented electrical contacts on 135 cassettes for speed detection, but it lacked the comprehensive data and standardization of DX, limiting its adoption.

Applications and Legacy

Usage in Photography

Roll film is widely utilized in for its flexibility in capturing sequences of images on a single spool, allowing photographers to expose multiple frames without the need for individual plate handling. This format supports daylight loading in standard cassettes for (135 format) and spools for 120 rolls, with 135 allowing insertion into the camera back under ambient light and 120 typically requiring subdued light, then advanced frame by frame using a manual lever, knob, or motorized drive to position fresh for each . For 135 format, unloading typically involves rewinding the exposed film back into its original cassette to prevent fogging from stray light, while for 120 the exposed portion is wound onto the take-up spool before removal; these processes protect the until development. During the exposure process, photographers manually count frames via a camera's built-in counter or visual indicators to track remaining shots, often employing bracketing techniques—exposing multiple images at varied apertures or shutter speeds around a metered setting—to ensure creative control and account for metering inaccuracies in varying light conditions. Post-exposure, color roll films are processed using the C-41 chromogenic method, which involves developer, bleach-fix, and wash steps to produce vibrant negatives, while black-and-white rolls are developed in versatile solutions like Kodak D-76, a fine-grain developer that yields detailed negatives suitable for enlargement. Roll film integrates seamlessly with diverse camera designs, including cameras like the M-series, which use 35mm rolls for compact 35mm shooting, and twin-lens reflex (TLR) models such as the , optimized for 120mm rolls to deliver larger negatives with enhanced resolution. Single-lens reflex (SLR) cameras, exemplified by the Nikon F series, also accommodate roll film via interchangeable backs, enabling precise focusing and through-the-lens viewing for professional applications. These compatibilities make roll film a staple in both amateur and studio workflows, from to portraiture. Creatively, the inherent grain structure of roll film emulsions contributes to a distinctive aesthetic, imparting and depth that many photographers seek for artistic expression, particularly in low-light scenarios where finer-grained like Kodak Tri-X balance sharpness with visible character. Additionally, push/pull processing techniques allow adjustment of the film's effective ISO by over- or under-developing during ; for instance, pushing ISO 400 film to increases contrast and grain for dramatic effects in underexposed shots, while pulling reduces density for softer highlights in overexposed frames.

Decline with Digital Era

The advent of digital cameras in the marked the beginning of a significant decline in roll film usage, as these devices provided immediate image review and eliminated the need for chemical processing. In 1991, introduced the DCS 100, the first commercially available , which combined a body with a 1.3-megapixel , offering professionals a filmless alternative that reduced reliance on roll film for rapid workflows. This shift gained momentum through the late and early , when digital sensors matched or exceeded film quality while lowering costs and enabling instant feedback, leading to a sharp drop in film consumption. The integration of high-quality cameras into smartphones further accelerated the decline of roll film by the mid-2000s, making ubiquitous and accessible without dedicated equipment. adoption resulted in a 93% reduction in dedicated camera sales by 2020 compared to 2010, as users favored the convenience of on-device capture and sharing, further eroding the market for analog roll film. The market repercussions were profound, exemplified by 's struggles as film sales plummeted in the face of digital dominance. In 2012, filed for Chapter 11 bankruptcy protection, attributing the move to the destruction of its film-based by . Earlier, in 2009, discontinued , its iconic color slide film introduced in 1935, due to steadily declining demand in the digital era. Despite the overall decline, roll film has experienced a niche revival in the , driven by analog enthusiasts seeking tactile creativity and aesthetic uniqueness amid digital saturation. As of 2025, this revival persists, with increased interest among younger photographers and stable production from key manufacturers. Limited manufacturers continue production to serve this market, including , which offers black-and-white 35mm and 120 roll films like HP5 Plus for versatile applications. sustains output of color negative stocks such as Fujicolor Superia and Acros, catering to hobbyists and professionals alike. These films find ongoing use in art and , where their organic and color rendition provide a distinctive, timeless quality for editorial and advertising work. Roll film's legacy endures in digital technology, particularly through the adoption of the 35mm full-frame sensor standard, which mirrors the 36x24 mm negative size of traditional 135 roll film to ensure compatibility with existing lenses and aesthetics. Additionally, analog originals retain superior archival value over digital files, as film offers long-term stability without reliance on evolving storage formats, prompting institutions like Hollywood archives to use it for preserving even digitally shot content.

References

  1. [1]
    Original Kodak Camera, Serial No. 540
    George Eastman invented flexible roll film and in 1888 introduced the Kodak camera shown to use this film. It took 100-exposure rolls of film that gave ...
  2. [2]
    George Eastman, Kodak, and the Birth of Consumer Photography
    In 1885, Eastman introduced a roll film holder that fit into existing cameras, with the silver bromide emulsion coated directly on paper that had been spooled.Missing: definition | Show results with:definition
  3. [3]
    Kodak and the Rise of Amateur Photography
    Oct 1, 2004 · Invented and marketed by George Eastman (1854–1932), a former bank clerk from Rochester, New York, the Kodak was a simple box camera that came ...
  4. [4]
    From the Camera Obscura to the Revolutionary Kodak
    The first successful roll-film hand camera, the Kodak, was launched publicly in the summer of 1888. Inventor George Eastman received a patent (number 388850)
  5. [5]
    Technology of photography - Roll Film, Camera Types, Exposure
    The term roll film is usually reserved for film wound up on a spool with an interleaving light-tight backing paper to protect the wound-up film.
  6. [6]
    5.1 A Short Guide to Film Base Photographic Materials: Identification ...
    The three main film base types are cellulose nitrate, cellulose acetates, and polyester. Cellulose nitrate and acetates are unstable and require special care.Missing: silver halide
  7. [7]
    Photographic Film - an overview | ScienceDirect Topics
    Photographic film is defined as a light-sensitive medium that contains silver halide crystals, primarily silver bromide, which reacts to ionizing radiation ...
  8. [8]
    How Photographic Film Is Made - Lomography
    The film base is usually made of cellulose triacetate, acetate, or polyester. The emulsion is the active ingredient that will capture the final image.Missing: materials | Show results with:materials
  9. [9]
    Glass Holdings in the Still Picture Branch | National Archives
    Mar 1, 2024 · The cellulose plastic film (i.e., rolled film) that dominated photography during much of the 20th century emerged as an alternative to glass as ...Missing: originated | Show results with:originated
  10. [10]
    Introduction to Film Types - Lomography
    What are the different photographic film formats? The three main types of film format are 35 mm, medium format and large format. More unusual formats also exist ...
  11. [11]
    [PDF] Physical Properties of Polyester Film Base | Kodak
    The values are averages of several measurements, and are provided as a general guide to physical properties. Thermal Coefficient of Expansion. (length, width).
  12. [12]
    Standard Film Sizes - Antique and Vintage Cameras
    The film is 35 mm wide with perforations along each edge at a pitch of 3/16". The standard frame size, for still cameras, was 24 x 36 mm (image plus inter-frame ...Missing: characteristics | Show results with:characteristics
  13. [13]
    Width and tolerance of 120 film? - Photrio.com Photography Forums
    Nov 3, 2018 · According to ISO 732:2000, the width of the film must be between 60.7 and 61.7mm. Most films I've measured have been around 61.2mm.Kodak films narrower than others? - Photrio.com Photography Forums120 Roll Film Backing Paper | Photrio.com Photography ForumsMore results from www.photrio.com
  14. [14]
    120 Film: The History and Characteristics of Medium Format
    Oct 1, 2023 · Coming in approximately 61 mm wide and 820 mm in length, the film is attached to a piece of backing paper longer and slightly wider than the ...Missing: width perforations
  15. [15]
    Rollfilm - Camera-wiki.org - The free camera encyclopedia
    May 17, 2025 · Roll film refers to a method of film loading where the bare film is wound up on an open spool, but protected by an opaque paper backing.
  16. [16]
    [PDF] FILM SPECIFICATIONS - Squarespace
    All 35 mm camera films and some 16 mm camera films have perforations on both edges (2R in the sketch).
  17. [17]
    Celluloid and Photography, part 1: Celluloid as a substitute for glass
    Nov 3, 2012 · These films form a perfect substitute for glass plates, and have all the advantages of portability and lightness of paper films without ...
  18. [18]
    Developing Equipment History - Photographic Memorabilia
    Jul 15, 2025 · Roll films enabled a massive improvement in picture taking convenience compared to the use of large, heavy and fragile, glass plates but ...Missing: portability | Show results with:portability
  19. [19]
  20. [20]
    Celluloid and Photography, part 2: The development of celluloid roll ...
    Nov 10, 2012 · Throughout the 1890s, transparent celluloid roll film was manufactured in ever-increasing quantities by both Eastman and other firms that ...Missing: snapshot | Show results with:snapshot
  21. [21]
    History - Kodak
    When George Eastman marketed the first commercial transparent roll film in 1889, it enabled Thomas Edison to develop the first motion picture camera. Since ...
  22. [22]
    [PDF] María Fernanda Valverde - Rochester Institute of Technology
    Gelatin dry plates started being replaced as early as 1890, and they were almost completely replaced by the lighter nitrate film negatives by the end of the ...Missing: originated | Show results with:originated
  23. [23]
    History of Film | Kodak
    1889. The first commercial transparent roll film, perfected by Eastman and his research chemist, was put on the market. The availability of this flexible ...1940-1959 · 1960-1979 · 1980-2000
  24. [24]
    The History of the Leica I
    ### Summary of 1925 Leica and 35mm Film Popularization
  25. [25]
    Kodak 620 Rollfilm - kodak classics - mischa koning
    Kodak introduced 620 film in 1931 with the US model of the Six-20 Kodak and at almost the same time stopped producing cameras taking 120 film, a situation ...
  26. [26]
    Kodak Films To Be Coded - The New York Times
    Mar 11, 1983 · The electronically readable codes, resembling supermarket bar codes, could allow a camera to read 24 different exposure ratings, Kodak said.Missing: history | Show results with:history
  27. [27]
    A Kodak team effort : Advantix photographic system project - PMI
    ON 22 April 1996, consumers around the world began buying and using products and services from an entirely new photographic system: the Advantix Advanced Photo ...
  28. [28]
    ISO 732 - 1975-05 - DIN Media
    ISO 732:1975-05 Photography; Dimensions for 127, 120 and 620 roll film, backing paper and film spools. Buy Subscribe Price on request Add to basket
  29. [29]
    ISO 732:2000 - Photography — 120-size and 220-size films
    2–5 day deliveryThis International Standard provides specifications for. _ dimensions of 120-size and 220-size films and of the spools common to both,.Missing: 1975 roll<|separator|>
  30. [30]
    135 Film - Vintage Camera Lab
    135 Film Format Specifications ; Type: cartridge film ; Typical Frame Sizes: 36 x 24 mm ; 24 x 18 mm.Missing: roll | Show results with:roll
  31. [31]
  32. [32]
    How to Bulk Load 35mm Film by Amy Elizabeth
    Nov 11, 2022 · You now have all your supplies for bulk loading! Supplies - How to Bulk Roll Film on Shoot It With Film Bulk film loading supplies ... light-tight ...
  33. [33]
    The rise, rise, rise... and fall of the compact film camera
    Jul 29, 2021 · The Leicas and Zeiss Ikons that were instrumental in popularizing 35mm film were expensive, but in the late 1930s more affordable designs – such ...
  34. [34]
    Medium and 35mm Film Formats - Photoethnography.com
    Film Formats (35mm, Medium Format) ; 6x6, 56mm x 56mm 3136 sq.mm, 12 ; 6x7, 56mm x 67mm 3752 sq.mm, 10 ; 6x8. 56mm x 75mm 4200 sq.mm. 8 ; 6x9 ; 6x17 ...
  35. [35]
  36. [36]
    What Film Does Medium Format Cameras Take - K&F CONCEPT
    Aug 20, 2024 · 6x9 cm: The largest standard format for 120 film, using even more film per frame, resulting in about 8 exposures per roll. You can see these 120 ...
  37. [37]
    The fluff on film formats - Dante Stella
    By contrast, a roll of medium format that costs the same amount will yield 15-16 shots (6x4.5), 12 shots (6x6), 10 shots (6x7), 8 (6x9), 7 (6x10) and 4 (6x18).
  38. [38]
  39. [39]
    Folding Cameras: Medium Format in the Pocket - Lomography
    Folding cameras have been the typical amateur camera from the beginning of the 20th century to the 50s, mostly using either 120 or 620 medium format film.
  40. [40]
    220 Film (Medium Format Film) Guide | EverPresent
    It's the exact same width as 120 film (about 60mm wide), but it's twice as long, so it can hold twice as many exposures. 220 format film was used mostly in ...
  41. [41]
    History of Kodak Roll Film Numbers
    Discontinued Eastman Kodak Roll Films ; 616. 1932. May 1984. 2 1/2 x 4 1/4 ; 620. 1932. Jul 1995. 2 1/4 x 3 1/4.
  42. [42]
    126 Instamatic Film - History and Status
    Jan 24, 2024 · The 126 format, introduced by Kodak in 1963, became one of the most iconic and recognizable formats of this era.
  43. [43]
  44. [44]
  45. [45]
    Film thickness - Photrio.com Photography Forums
    Jun 17, 2013 · 35 mm film has 120 μm, 120 film 100μm thickness. Some companies make both from the same base. It may be that you have 120 μm MF or 100μm 35mm film.Thickness of film support | Photrio.com Photography ForumsUltra-thin film stocks | Photrio.com Photography ForumsMore results from www.photrio.comMissing: 0.1-0.2mm evolution
  46. [46]
    Base polymers | National Film and Sound Archive of Australia
    This was the original film base material that was used from 1895 to approximately 1950. Cellulose nitrate was manufactured using cotton linters, a by-product of ...Cellulose Acetates · Base Polymer Decomposition · Cellulose Acetate (di & Tri)
  47. [47]
    Film-Based Negatives and Positives | National Archives
    May 1, 2023 · Polyester was introduced in the mid 1950s but dates for its use vary for different formats. Generally, most sheet film from the 1970s onwards is ...
  48. [48]
    [PDF] 2. understanding film and how it decays - Mellon Guide.qxd
    Film stock has two primary layers. The thicker layer, the transparent plastic base, pro- vides support. The thinner layer, the emulsion, carries photosensitive ...
  49. [49]
    Glossary of Motion Picture Terms | Kodak
    A general term for form of film presentation in which the picture shown has an aspect ratio greater than 1.33:1.
  50. [50]
    Caring for photographic materials - Canada.ca
    Dec 14, 2018 · A supercoat, or topcoat, of clear gelatin is applied on top of the emulsion layer for protection. A layer of gelatin is applied to the verso of ...
  51. [51]
    [PDF] THE ESSENTIAL REFERENCE GUIDE FOR FILMMAKERS - Kodak
    In it you will find technical information—about light meters, cameras, light, film selection, postproduction, and workflows—in an easy-to-read- and-apply format ...<|control11|><|separator|>
  52. [52]
    ISO Speed Standard for Film Speed - The ANSI Blog
    The ASA and DIN scales were merged together to create the ISO scale, which was first introduced in the original 1974 version of ISO 6. ISO speed makes use of ...
  53. [53]
    using 126 film - kodak classics - mischa koning
    On the 126 film cartridge the film speed can be sensed, by a camera suitably equipped, from a notch in the upper front edge of the cartridge. This notch varies ...
  54. [54]
    ASA setting on 126 film cameras - Photo.net
    Nov 25, 2006 · The notch is analog, and indicates film speed. But 99% of the 126 cameras made were designed only for ASA 64 to 80 film, and had no sensor for ...
  55. [55]
    Underexposure vs Overexposure - A Beginner's Guide
    Jan 23, 2024 · In this article, we discuss the topic of underexposure and overexposure in photography, with image samples and other relevant information for beginners.
  56. [56]
    DX Encoding - What it is and how it became a standard for the ...
    Dec 11, 2018 · The system was developed by Kodak in January 1983. Popular Photography magazine at the time said “Kodak is making the DX system available ...
  57. [57]
    Video: What is DX encoding and how did it become an industry ...
    Dec 9, 2018 · They're called Camera Auto Sensing (CAS) codes and they're part of DX encoding, an industry standard first announced by Kodak in March 1983.Missing: history | Show results with:history
  58. [58]
    DX Film Code - FlynnGraphics
    Jun 22, 2018 · The code system was originally introduced by Kodak in March of 1983 for marking 135 and APS film and cartridges. speed on the camera.
  59. [59]
    The Birth of the Digital Camera: From Film to Filmless Revolution
    Apr 25, 2025 · In 1991, Kodak introduced the DCS 100, which was essentially a Nikon F3 SLR camera with a digital sensor and attached storage unit – the first ...
  60. [60]
    The History of the First Digital Camera from Concept to 2025 and ...
    Jun 18, 2025 · In 1991, Kodak launched the DCS-100, the first commercially available DSLR camera, built by combining a Nikon F3 body with Kodak's digital ...
  61. [61]
    The Evolution of Photography: From Film to Digital - Harmann Studios
    Jan 8, 2025 · Film photography, the process of capturing images on light-sensitive film, has a rich history that dates back to the early 19th century. Early ...
  62. [62]
    Decline of the camera industry accelerated by the Covid pandemic
    Mar 2, 2021 · As a direct result of the move to smartphones, the industry sold 93 per cent fewer cameras in 2020 than it had done a decade previously, with ...
  63. [63]
    How Kodak Failed - Forbes
    Jan 18, 2012 · This strategic failure was the direct cause of Kodak's decades-long decline as digital photography destroyed its film-based business model.
  64. [64]
    Kodak Retires Kodachrome After 74 Years - NPR
    Jun 23, 2009 · Eastman Kodak is discontinuing the manufacture of the Kodachrome brand color positive film. Sales were big in the 1950's and 60's but Kodachrome ...
  65. [65]
    The Resurgence of Analog Photography: Film is Coming Back!
    Jun 3, 2024 · Film photography is experiencing a renaissance, drawing both seasoned photographers and a new generation of enthusiasts back to its unique charms.<|separator|>
  66. [66]
    Black & White Film - Ilford Photo
    Black & White Film Collections: 35mm Film, 120 Roll Film, Sheet Film, 35mm Bulk Length Film. Items 1-12 of 40.35mm Film · 120 Roll Film · Sheet Film · 35mm Bulk Length Film
  67. [67]
  68. [68]
    Film's Comeback: Why Analog Photography Is Back - Nordie Art Studio
    Nov 18, 2024 · From high-fashion editorials down to advertising, the medium introduces a timeless element of class. The depth of color and texture present in ...
  69. [69]
    Why are Full Frame cameras called "Full Frame"? The history ...
    Sep 9, 2021 · All the sensors were originally smaller than the 36x24mm size of the 35mm negative back then, most having some sort of crop factor. For example, ...
  70. [70]
    Did You Know You Can Archive Your Digital Photos on Analog Film?
    Apr 18, 2021 · Analog film is such a stable archival format that Hollywood still uses it to archive their films, even the ones that were fully shot in digital format.