I'm Roger and I am the founder of Lensrentals.com. Hailed as one of the optic nerds here, I enjoy shooting collimated light through 30X microscope objectives in my spare time. When I do take real pictures I like using something different: a Medium format, or Pentax K1, or a Sony RX1R.
Humor and Sarcasm
Somedays I get bored with testing. Somedays I have to read new product release blurbs and get nauseous. And somedays I find something funny on the internet. All three of these happened the other day, which led to me randomly corresponding with Seb Pearce about my thoughts that today’s photography marketing blurbs were so boring they […]
Humor and Sarcasm
It’s been obvious for a long time that people don’t want to read long drawn out blog posts about lenses. They want a numerical score so that they can make quick comparisons. We have pounded the drum for a long time that things like validity, relevance, transparency and scientific methodology are of critical importance. But The […]
Geek Articles
I’ve been writing peer-reviewed scientific papers for way longer than I’ve been blogging about optics. I value significant numerical information presented with methods that allow reproducibility as much as anybody. But way too many people who can’t define either spurious accuracy or spurious resolution believe (and unfortunately create) nonsense numbers on the internet and repeat them as though they mean something. So […]
Geek Articles
You probably shouldn’t read this article unless you’ve at least skimmed through Part 1. To summarize, we had a Sony FE 70-200mm f/2.8 GM OSS lens that had been dropped and no longer would focus. We tore it down both to see if we could repair it and to see what-all was up inside there. In the […]
Geek Articles
A lot of you are aware that we’ve been rather puzzled by the Sony FE 70-200mm f/2.8 GM OSS lens. It didn’t test like we expected it to, which led us to reevaluate our testing methods with outside consultants (we’re now comfortable they are valid, BTW), question the accuracy of different types of autofocus, and search […]
