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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. Canon TS-E 135mm lens - Wikipedia

   en.wikipedia.org/wiki/Canon_TS-E_135mm_lens

   The Canon TS-E 135 mm f / 4L MACRO is a tilt-shift, Macro prime lens that provides the equivalent of the corresponding view camera front movements on Canon EOS camera bodies. Unlike most other EF-mount lenses, it does not provide autofocus .

4. Macro photography - Wikipedia

   en.wikipedia.org/wiki/Macro_photography

   True macro lenses, such as the Canon MP-E 65mm f/2.8 1-5x Macro, Laowa 25mm f/2.8 2.5-5X Ultra Macro (a relatively shorter focal length) or Minolta AF 3x-1x 1.7-2.8 Macro, can achieve higher magnification than life size, enabling photography of the structure of small insect eyes, snowflakes, and other minuscule objects. Others, such as the ...

5. Canon Extender EF - Wikipedia

   en.wikipedia.org/wiki/Canon_Extender_EF

   The Canon Extender EF lenses are a group of teleconverter lenses made by Canon. These lenses are used between any compatible EF type lens and any of the Canon EOS line of cameras. When used with a compatible lens, they will multiply the focal length of the lens by a factor of either 1.4x or 2x, at the cost of decreasing the lens' aperture by 1 ...

6. 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:

7. List of Canon products - Wikipedia

   en.wikipedia.org/wiki/List_of_Canon_products

   In 1987, Canon introduced the EOS Single-lens reflex camera system along with the EF lens-mount standard to replace the 16-year-old FD lens-mount standard; EOS became the sole SLR camera-system used by Canon today.