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2. Extension tube - Wikipedia

   en.wikipedia.org/wiki/Extension_tube

   Extension tubes are sometimes confused with teleconverters, an optical component (i.e., containing lenses) designed to increase effective focal length. A close-up lens also enables focusing closer for macro photography but, unlike an extension tube, a close-up lens actually is an optical element.

3. Macro photography - Wikipedia

   en.wikipedia.org/wiki/Macro_photography

   Many macro lenses are characterised by a high amount of chromatic aberration, especially when using reversed-lens, extension tube or close-up lens. Some macro lenses, called apochromatic lenses, are designed to better control this, such as the Laowa 100mm f/2.8 2x Ultra Macro APO and the Sigma APO MACRO 150mm F2.8.

4. Close-up lens - Wikipedia

   en.wikipedia.org/wiki/Close-up_lens

   That distance is sometimes given on the filter in millimeters. A +3 close-up lens has a maximal working distance of 0.333 m or 333 mm. The magnification is the focal distance of the objective lens (f) divided by the focal distance of the close-up lens; i.e., the focal distance of the objective lens (in meters) multiplied by the diopter value (D) of the close-up lens:

5. Fujica X-mount - Wikipedia

   en.wikipedia.org/wiki/Fujica_X-mount

   The "macro cine copy X" is a macro lens with specific windows to take copies from 8 mm and 16 mm films. The "microscope adapter X" to adapt the camera body to a microscope. A "reverse adapter X", that can be mounted with an extension tube. A classic "teleconverter 2X". Fuji Photo Recorder back.

6. 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!

7. Bellows (photography) - Wikipedia

   en.wikipedia.org/wiki/Bellows_(photography)

   A macrophotography bellows mounted on a Canon FT QL (1966) A folding Kodak camera with bellows In photography, a bellows is the accordion-like, pleated expandable part of a camera, usually a large or medium format camera, to allow the lens to be moved with respect to the focal plane for focusing. [1]