For hundreds of years, the principle behind the telescope has been as simple as it gets: build a lens or mirror to collect a large amount of light, focus that light onto a detector (like an eye, a ...
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 ...
Hands-on impressions and sample shots from the Kenko Tokina 400mm f/8 mirror lens for Sony NEX and Micro Four Thirds cameras. Hands-on impressions and sample shots from the Kenko Tokina 400mm f/8 ...
[Robb] has had a little experience making lenses from scratch. His first attempt was for a DIY projector, and while the lens was a little blurry, it did work rather well for something carved out of a ...
Digital Camera World on MSN
Everyone is going nuts over this new reflex lens. Don't they know how horrible reflex lenses are?
The Kase Reflex 150mm f/5.6 AF is getting a lot of hype online –but does nobody remember how bad these lenses are?
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