Geek Articles
Just the Lenses: The 70-200mm f/4 Comparison
There is a very good reason that we haven’t gotten around to testing one of the most commonly used zoom lenses until just now. We forgot. I was testing the Sony FE 70-200mm f/4 G OSS lens because we had just torn one down, I was impressed by the construction, and I wanted to see if the copy-to-copy…
LensRentals Tears Down the Zeiss Batis 25mm f/2 Lens
LensRentals hasn’t been able to get enough copies of the Zeiss Batis lenses to even fill our existing orders, much less enough for Aaron and I to test and play with them. But one of our customers was kind enough to drop a Zeiss Batis 25mm f/2 lens the other day. Nothing looked smashed, but after…
Mythbusting: Parfocal Photo Zooms
About twice a week I get a call from a photo-videographer wanting to know which photo zoom lenses in a certain focal length are parfocal (stays in focus while changing focal lengths). It’s understandable why they would ask; a superb photo zoom is 1/10th the cost of a good video zoom. They get…
How to Clean Your Camera Lenses (And Check For Problems)
In the past, Roger has shown us time and time again, that internal dust and other artifacts rarely have an effect on the image quality produced by your lenses. With how complicated the optics in a lens are designed, lenses are rarely affected by these small flaws such as lens dust. That said, every…
The Long-Awaited, Scary and Amazing Fuji Lens Teardown
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 we can’t get parts…
A Peek Inside the Leica Vario-Elmarit-SL 24-90mm f/2.8-4 ASPH
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…