Category: Technical Discussions
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A Look at Electromagnetic Focusing
If you’re like me you like to know what’s going on inside your camera or lens to some degree. They are tools, and if I want to get the best use out of my tool I need to know it’s strengths and weaknesses. You may not have noticed, especially if you shoot just Canon or Nikon, but there’s been a…
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Is the New RED Weapon, the Weapon of Choice?
The choice is simple; are you cool, or are you boring? That has to be the big decision RED wants you to make, right? Sure, the argument could be made that you choose RED for the stunning 6K resolution that it offers, or the 16.5 plus glorious stops of dynamic range, but really you want it because…
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Sony FE 85mm f/1.4 GMaster Emergency Tear Down
*Credit: DC Super Friends Feature Vehicle Assortment 2012 Series 01* OK, I usually don’t respond to requests to disassemble things. I have a day job and the blog stuff is my hobby. But every so often the Bat Signal get’s raised over Gotham Internet and Aaron and I feel the need to fight the crime…
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Sony FE 85mm f/1.4 G Master Lens MTF and Variance
We are pretty excited about the new Sony G Master Lenses for FE mount cameras. Our excitement may be a little different than yours because we see the Sony FE lenses as an evolving new product. There were some things we really liked and some things we really didn’t like about the first FE mount…
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Sony Goes World Class: The 24-70mm f/2.8 GM MTF and Variance Tests
I was one of those who noted Sony had some troubles, as manufacturers often do, with some of their first generation lenses for full-frame FE mount cameras. When they announced the G Master lens series I was really excited to test them. I was expecting Sony to have made progress both with optical…
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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…
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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…
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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…
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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…
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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…
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Comparing the Leica Monochrom to a Sony a7R II
## What Is A Monochrome Sensor And Why Does It Exist? Leica cameras have always been exciting to me. I think it’s mostly because of how expensive they are. Holding and using something incredibly out of my budget gives the shooting experience a little extra magic. But even with that magic, I…
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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…
