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.
Equipment
For, oh, about 2 years now, every time we do a lens teardown I get emails from Fuji shooters asking me to tear down one of their lenses. There are several reasons we haven’t. For one thing, we have far fewer copies of those lenses so there is less reason to work on them. Since […]
Equipment
We always get excited when a lens comes out with some new technology or major changes. This time, the new technology came from an unexpected source when Leica released the Vario-Elmarit-SL 24-90mm f/2.8-4 ASPH lens. I know most of you don’t think of Leica as technological groundbreakers and most of you probably barely noticed the release of […]
Equipment
Pinhole images from new, but optically decentered lens. Olaf Optical Testing, 2016 After we published a number of posts about copy-to-copy variation, people were quick to say that this company or that needs to ‘just’ improve quality control. I totally agree but realize most people don’t have a clue what ‘improving quality control’ […]
Equipment
I got an email the other day that got me thinking. A guy simply asked “How far do I have to stop down a lens to get maximum performance. I’ve heard two stops from wide open. I’ve heard down to f/8. Which is correct?” I asked him which lens he was referring to, and was […]
Equipment
Last week we did a tear down of the Canon 35mm f/1.4 Mk II, an expensive, large, weather-resistant lens. Then we did a tear down of the Sony FE 35mm f/1.4 ZA lens, and expensive, weather-resistant lens with very different technology. Today we’re going to tear down the Sigma 35mm f/1.4 DG HSM A1 (Art) lens, […]
