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  2. Depth-of-field adapter - Wikipedia

    en.wikipedia.org/wiki/Depth-of-field_adapter

    The term 35mm adapter is common, since most designs use a focusing screen the size of a 35mm film frame (24×36 mm) and interface with lenses designed for 35mm cameras. The use of adapters has decreased largely due to the video function available on newer DSLR cameras. DOF adapters have been developed for use with smartphones, allowing DSLR ...

  3. Lens adapter - Wikipedia

    en.wikipedia.org/wiki/Lens_Adapter

    Another branch of lens adapters include an ND-filter to simplify changing lenses, which HolyManta introduced in 2013. [4] The depth-of-field adapter (also called a DOF adapter or 35 mm adapter) is a largely obsolete device that uses a ground glass focusing screen to enable the use of interchangeable lenses on a fixed lens camcorder. [5]

  4. Fujica X-mount - Wikipedia

    en.wikipedia.org/wiki/Fujica_X-mount

    The "mount adapter X-S and X-D" for M42 lenses. Two extension tubes : X25 (25 mm) and X50 (50 mm). The "auto bellows X" used with a 50 mm lens can provide 1 to 3× magnification. It can also be used with the "focusing rail X". The Fujica "slide copier X" mounted on the "focusing rail X" simplifies the copying of 135 film pictures.

  5. M42 lens mount - Wikipedia

    en.wikipedia.org/wiki/M42_lens_mount

    It is more accurately known as the M42 × 1 mm standard, which means that it is a metric screw thread of 42 mm diameter and 1 mm thread pitch. (The M42 lens mount should not be confused with the T-mount , which shares the 42 mm throat diameter, but differs by having a 0.75 mm thread pitch.)

  6. 35 mm equivalent focal length - Wikipedia

    en.wikipedia.org/wiki/35_mm_equivalent_focal_length

    35 mm equivalent focal lengths are calculated by multiplying the actual focal length of the lens by the crop factor of the sensor. Typical crop factors are 1.26× – 1.29× for Canon (1.35× for Sigma "H") APS-H format, 1.5× for Nikon APS-C ("DX") format (also used by Sony, Pentax, Fuji, Samsung and others), 1.6× for Canon APS-C format, 2× for Micro Four Thirds format, 2.7× for 1-inch ...

  7. Pentax K-mount - Wikipedia

    en.wikipedia.org/wiki/Pentax_K-mount

    The T-mount is a 42 mm diameter 0.75 mm pitch screw mount with a 55 mm flange focal distance. Later versions (T2, T4, TX) were more advanced and complex. Later versions (T2, T4, TX) were more advanced and complex.

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. GAU-12 Equalizer - Wikipedia

    en.wikipedia.org/wiki/GAU-12_Equalizer

    The General Dynamics GAU-12/U Equalizer is a five-barrel 25 mm Gatling-type rotary cannon.The GAU-12/U is used by the United States, Italy and Spain, which mount the weapon in their attack jets such as the AV-8B Harrier II, airborne gunships such as the Lockheed AC-130, and land-based fighting vehicles.

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