Sigma 70mm f/2.8 Macro Art Series Reviewed

Equipment

Review of the Sigma 70mm f/2.8 Art Series Macro Lens

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I love my Canon 100mm f/2.8L Macro lens. Since I got it six months ago from Lens Authority (after renting it half a dozen times for projects), it hasn’t really left my camera body. Though like most macro lenses I’ve used, it’s a bit slow to focus, and can be a little fickle when using […]

How to MTF Test a Lens

Geek Articles

Developing a Rapid MTF Test for Photo and Video Lenses

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. . . Or What I Did for the Last Year Instead of Having a Life. Nearly a decade ago, I started testing lenses. A few years later, after I complained about a manufacturer’s claiming an awful lens was in spec, an engineer patted me on the head and told me “you really don’t have the […]

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