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Technical Discussions

Autofocus Reality Part 3A: Canon Lenses

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  Sometimes I get to write cool, new stuff. Sometimes there’s just grunt work to be done, usually of my own making. This is one of those times. To bring you up to date if you’ve landed here first, this is how I got here. Autofocus Reality Part 1 showed that on center-point, single-shot autofocus, […]

Technical Discussions

Autofocus Reality Part 2: One vs. Two, Old vs. New

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The first part of this series confirmed what we already new: Live view focus is more accurate than phase detection AF. This part is going to (sort of) look at something I’ve wondered about along with some related old wives’ tales. And unlike the first article, at the end of this we’ll have learned something […]

Technical Discussions

Autofocus Reality Part 1: Center-Point, Single-Shot Accuracy

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Once upon a time I wrote an article attempting to explain phase-detection autofocus¬†and its limitations.¬†That was a lot like trying to explain what happened to the Mary Celeste or why Stonehenge was built. Actually we probably have a better handle on the Stonehenge thing than we do on the Mary Celeste or phase-detection autofocus. So […]

Teardowns and Disassembly

The Olympus 75mm f/1.8 is Expensive Because It’s Worth It.

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The first Olympus 75mm f/1.8 m4/3 lens arrived today, courtesy of Tyler’s connections with the King of Siam or wherever it is he gets these things. I had to test it, of course, because that’s what I do. I hadn’t planned on writing about it; the lens has already been reviewed thoroughly at SLRgear.com, sample […]

Lenses and Optics

Canon’s 18-135mm IS gets an STM Makeover

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So the usual happened today: I read in a couple of places that the Canon 18-135mm IS STM lens isn’t going to be available in the U. S. for a while. A few minutes later Tyler walks in my office with one, asking if I want to test it. Let me be clear where I’m […]

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