The a7R has no anti-aliasing (AA) filter. The a7 has one that’s pretty weak, and mostly operates in one direction. With its big fat pixels, the a7S would seem to be prone to aliasing. What did Sony do about that when they designed the camera? I set out to learn. I put the sharpest lens… [Read More]

The a7S has a silent shutter mode. When running silent, the mechanical shutter is on vacation, lying back and catching Z’s while the sensor does all the work. The mechanical shutter is a rabbit, completing an exposure in 1/250 second (for shutter speeds faster than that, a slit moves across the sensor, but it takes… [Read More]

Next up in my search for rangefinder wide angle lenses that work well on the Sony a7S: the Leica 18mm f/3.4 Super-Elmar-M ASPH. I also tested the Zeiss 21mm f/2.8 Distagon ZF.2, an F-mount lens with a  retrofocus design that shouldn’t have any angle-of-incidence problems. I don’t have an F-mount 18mm prime, or I would have… [Read More]

Today I continued my search for rangefinder wide angle lenses that work well on the Sony a7S. The current candidate is the Leica 24mm f/3.8 Elmar-M ASPH. I also tested the Nikon AF-S Nikkor 24mm f/1.4 G ED, an F-mount lens with a seriously retrofocus design that shouldn’t have any angle-of-incidence problems. First, a couple… [Read More]