Technical Discussions
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 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
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 […]
Roger's Corner
My mind is a strange and dangerous place. I shouldn’t go in there alone after dark. But the other night I was thinking, just me and myself, about all the new camera releases this year. Which has made the biggest impact? Is it the Canon 5D III with that world-class autofocus system? The Olympus OM-D […]
Lenses and Optics
I write a lot about the fact that every copy of a lens is slightly different than every other copy. Now don’t get me wrong: I’m talking slight differences that are barely detectable, not good or bad. Even when things appear to be in the “bad lens” area, they usually aren’t. The majority of the […]
