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How To's

Testing for a Decentered Lens: an Old Technique Gets a Makeover

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What is Decentering and What Does it Do? Strictly speaking, decentering would involve one or more of the lens elements being off of the central axis of the lens. This would prevent the curved surfaces of the lens from bending the light properly. In severe cases it could result in halos or ghosting. In most […]

Equipment

Standard-range micro 4/3 Imatest Results

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  This is the second in a series of three posts about Imatest results on m4/3 mount lenses. The first post covered most of the lenses of 25mm and wider focal length. Most of the zoom lenses in that test were done at, or near, their widest focal length since we were concentrating on the […]

Roger's Corner

Roger Gets a New Job

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Long ago in a lifetime far away, I discovered photography. I loved it. I mean, I really, really loved it. Not just learning how to make photographs. I loved learning how the camera and lenses made those photographs. I loved learning about the major and minor differences various lenses had. I spent every free moment […]

Lenses and Optics

Some Mirrorless 5X Macro Fun. (Too much fun, actually).

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I generally don’t write separate reviews on items. I put a ‘take’ up on most items we rent, letting people know what I think about it. That lets me be neutral because it doesn’t make me any difference what people rent as long as they’re happy with it: the return on a $10,000 lens and […]

Equipment

Wide-Angle Micro 4/3 Imatest Results

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Note: The results for standard range m4/3 lenses and zooms at 25mm are in the next article. A lot of Sony users liked seeing some Imatest results for NEX lenses, and some micro 4/3 users asked us to do the same thing. That’s a more complicated undertaking for several reasons. First, there is a much […]

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