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Geek Articles

Nikon 105mm f/1.4 E MTF Bench Tests

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Joey recently wrote an article about his new crush, the Nikon 105mm f/1.4 E lens, and has been in the lab about every other day since then, asking me if I’ve run the MTFs yet. “You’re going to be blown away,” he says. And every other day I tell him, “I don’t get blown away […]

Geek Articles

Fun with Field of Focus Part 1

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I’ve mentioned in some other posts that our optical tools can do a lot more than just test a lens’ MTF. For most of the last two years, though, testing MTF is what we’ve been doing. We may not seem all that busy, but we’ve assembled what is probably the world’s largest database of current camera lenses; […]

Lenses and Optics

The (sort of) Great 400mm Lens Shootout!

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I get asked a lot about different telephoto lenses. Is the 400 DO II better than the 400 DO? Which is better, the Tamron 150-600mm or the Sigma 150-600mm? You’ve probably noticed that I don’t answer those questions. The reason is simple. Our optical bench is designed to test lenses up to 2.5kg weight and […]

Equipment

More PhotoGeekery: Finite Conjugate MTF Bench Tests for Macro Lenses

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For the last several years we’ve talked about the fact that lens performance can vary with focusing distance. Our optical bench tests at infinity. Computerized target analysis (Imatest and DxO) tests at close distances. But when the results of target analysis and bench tests differ it’s hard to decide if the difference is because of different testing […]

Photography

Pay Attention to the Man Behind the Curtain

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  A Reasonably Non-Geeky Guide to Lens Tests and Reviews Hardly a day goes by that on some forum somewhere a nasty argument is going on about lens testing and reviewing. (Going forward, I’m going to use the abbreviation R/Ts for Reviewers and Testers.) As with all things on the internet, these discussions tend to gravitate […]

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