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  2. Template talk : Pentax K-mount lens compatibility chart

    en.wikipedia.org/wiki/Template_talk:Pentax_K...

    A second chart with focus on functionality between mount version and lens feature could be useful. -- Angerdan ( talk ) 19:27, 22 February 2018 (UTC) [ reply ] Related sources [ edit ]

  3. Template:Pentax K-mount lens compatibility chart - Wikipedia

    en.wikipedia.org/wiki/Template:Pentax_K-mount...

    lens function compatibility. KAF2 digital SDM without aperture simulator and with ED-interface: K-70. After update of firmware: K-50, K-1, K-3, K-3II, K-S2, K-S1. 2 – K10D can be updated to change from Powerzoom-use to SDM-drive. On cameras with K AF /K AF2 -mount without aperture simulator during Av metering the aperture has to be adjusted ...

  4. Contact lens - Wikipedia

    en.wikipedia.org/wiki/Contact_lens

    A pair of contact lenses, positioned with the concave side facing upward. Putting contacts in and taking them out. One-day disposable contact lenses with blue handling tint in blister-pack packaging. Contact lenses, or simply contacts, are thin lenses placed directly on the surface of the eyes. Contact lenses are ocular prosthetic devices used ...

  5. 1951 USAF resolution test chart - Wikipedia

    en.wikipedia.org/.../1951_USAF_resolution_test_chart

    A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens. It is widely used in optical engineering laboratory work to analyze and ...

  6. Pentax FA 31mm Limited lens - Wikipedia

    en.wikipedia.org/wiki/Pentax_FA_31mm_Limited_lens

    The SMC Pentax-FA 31mm f/1.8 AL Limited is a full-frame moderate wide-angle lens for Pentax K-mount. On an APS-C camera, it gives a normal field of view. It lacks Quick Shift Focus , which is now found on most other Pentax lenses, and therefore does not allow manual focusing while in autofocus mode.

  7. Spasm of accommodation - Wikipedia

    en.wikipedia.org/wiki/Spasm_of_accommodation

    A spasm of accommodation (also known as a ciliary spasm, an accommodation, or accommodative spasm) is a condition in which the ciliary muscle of the eye remains in a constant state of contraction. Normal accommodation allows the eye to "accommodate" for near-vision. However, in a state of perpetual contraction, the ciliary muscle cannot relax ...

  8. List of contact lens complications - Wikipedia

    en.wikipedia.org/wiki/List_of_contact_lens...

    Corneal abrasion. Corneal erosion. Contact lens acute red eye (CLARE) Corneal epithelial infiltrates. Keratitis. Corneal ulcer. Corneal stroma. Corneal neovascularisation. Corneal oedema.

  9. Landolt C - Wikipedia

    en.wikipedia.org/wiki/Landolt_C

    The Landolt C, also known as a Landolt ring, Landolt broken ring, or Japanese vision test, is an optotype: a standardized symbol used for testing vision. It was developed by the Swiss-born ophthalmologist Edmund Landolt . The Landolt C consists of a ring that has a gap, thus looking similar to the letter C. The gap can be at various positions ...

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