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  2. Cogset - Wikipedia

    en.wikipedia.org/wiki/Cogset

    This results in functionally compatible shifters, but specific freehub bodies, or necessitating the use of a spacer with a 7-speed cassette on an 8-speed hub. 8- and 9-speed cassettes and freehub bodies have the same width (41.5 mm), yet the sprockets on the 9-speed are closer together; as a result the shifters are not compatible, but they use ...

  3. List of abbreviations in photography - Wikipedia

    en.wikipedia.org/wiki/List_of_abbreviations_in...

    A lens accessory that fits between the lens and camera body and extends the focal length of the lens, often by 1.4x or 2x, at the cost of reduced light, decreased image quality, and slower autofocus. TCA: Transverse (lateral) chromatic aberration or lateral colour. Colour fringes that worsen the further the image point is from the optical axis ...

  4. Canon RF lens mount - Wikipedia

    en.wikipedia.org/wiki/Canon_RF_lens_mount

    Canon full-frame cameras have used the EF lens mount since 1987. In comparison with that mount, the RF mount's inner diameter is the same at 54 mm. [1] The RF mount's flange focal distance at 20 mm is much shorter than that of the Canon EF and EF-S mounts at 44 mm.

  5. List of Leica Camera models - Wikipedia

    en.wikipedia.org/wiki/List_of_Leica_Camera_models

    Leica Q (Type 116) compact full frame camera with a Summilux 28 mm f /1.7 ASPH lens was officially announced on June 10, 2015. [27] Its successor, the Leica Q2 with a 47.3 Megapixel full frame sensor, was launched in March 2019. In November 2020, the company released a monochrome version of the camera, the Q2 Monochrom, using a sensor similar ...

  6. Nikon F2 - Wikipedia

    en.wikipedia.org/wiki/Nikon_F2

    The F2's interchangeable viewfinders (also known as "heads") [3] marked it as a professional-level SLR and was considered by consumers one of its biggest strengths. By providing updated heads every few years, Nikon was able to introduce new versions of the F2 and keep the basic body in the latest technology until production ended in 1980.

  7. Freehub - Wikipedia

    en.wikipedia.org/wiki/Freehub

    The chain gear sprockets wear faster than the ratcheting mechanism. Replacing individual sprockets on a freehub cassette is easy compared to that on some freewheels. The ball bearings for the wheel's axle are in the hub, but a multi-speed freewheel requires a considerable distance between the drive-side bearings and the drive-side frame dropout ...

  8. Micro Four Thirds system - Wikipedia

    en.wikipedia.org/wiki/Micro_Four_Thirds_system

    Drawing showing the relative sizes of sensors used in most current digital cameras, relative to a 35mm film frame. The image sensor of Four Thirds and MFT measures 18 mm × 13.5 mm (22.5 mm diagonal), with an imaging area of 17.3 mm × 13.0 mm (21.63 mm diagonal), comparable to the frame size of 110 film. [4]

  9. Digital single-lens reflex camera - Wikipedia

    en.wikipedia.org/wiki/Digital_single-lens_reflex...

    A photographer will often use lenses made by the same manufacturer as the camera body (for example, Canon EF lenses on a Canon body) although there are also many independent lens manufacturers, such as Sigma, Tamron, Tokina, and Vivitar, that make lenses for a variety of different lens mounts. There are also lens adapters that allow a lens for ...