Kenko has announced the second version of its 400mm f/8 telephoto mirror lens. The new version features optical tweaks to improve image quality, compared to the previous model (which came out in July ...
The technical definition of a telephoto lens is one with a focal length greater (or longer) than 50mm (on the 35mm/full frame forma), but the telephoto range is more generally accepted to begin at ...
Digital Camera World on MSN
Canon wants to make zooms more compact. But what is a catadioptric lens?
Canon has patented a bunch of lenses with mirrors for full frame cameras and I’ve made some educated guesses why ...
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