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  2. Telecompressor - Wikipedia

    en.wikipedia.org/wiki/Telecompressor

    A telecompressor or focal reducer is an optical element used to reduce focal length, increase lens speed, and in some instances improve optical transfer function (OTF) performance. It is also widely known under the name “Speed Booster”, which is the commercial name of a line of telecompressors by the manufacturer Metabones.

  3. Lens adapter - Wikipedia

    en.wikipedia.org/wiki/Lens_Adapter

    Active lens adapter: Canon EF to Sony E. In photography and videography, a lens adapter is a device that enables the use of camera and lens combinations from otherwise incompatible systems. The most simple lens adapter designs, passive lens adapters provide a secure physical connection between the camera and the lens. Some passive adapters may ...

  4. Nikon 1-mount - Wikipedia

    en.wikipedia.org/wiki/Nikon_1-mount

    The FT1 adapter mounts and meters with all AI-P, AF, AF-S, D and G lenses and compatibles providing autofocus with all lenses with integrated autofocus motor. [2] It further mounts Pre-AI, AI, AI-S and E lenses without metering as well as lenses which jut out the F-mount (needing mirror lock-up on cameras with mirror).

  5. Canon RF lens mount - Wikipedia

    en.wikipedia.org/wiki/Canon_RF_lens_mount

    The EF-M mount has a flange focal distance of 18 mm. An EF-EOS R lens adapter enables Canon EF, EF-S, TS-E and MP-E lenses to be used on cameras that have the RF mount. [9] The three adapters have differing features: [10] Mount Adapter EF-EOS R; Control Ring Mount Adapter EF-EOS R – the Mount Adapter EF-EOS R with a lens control ring

  6. Lenses for SLR and DSLR cameras - Wikipedia

    en.wikipedia.org/wiki/Lenses_for_SLR_and_DSLR...

    For example, a 100 mm to 400 mm lens may have a maximum aperture of f/4.0 at the 100 mm end but will diminish to only f/5.6 at the 400 mm end of the zoom range. Zoom lenses with constant maximum apertures (such as f/2.8 for a 24–70mm lens) are usually reserved for lenses with higher build quality and are thus more expensive than those with ...

  7. List of Sony E-mount lenses - Wikipedia

    en.wikipedia.org/wiki/List_of_Sony_E-mount_lenses

    Sony Lens Adapter E/A 1 2010 Mount adapter APS-C 110g LA-EA1 for A-mount lenses on E-mount camera, glass-less, CD-AF / OS-PD-AF with SSM/SAM lenses only. Sony Lens Adapter E/A 2 2011 Mount adapter APS-C 200g LA-EA2 for A-mount lenses on E-mount camera, SLT-PD-AF with all AF lenses. Sony Lens Adapter E/A 3 2013 Mount adapter 35mm 110g LA-EA3

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