Archives for July 2014

…and, as a bonus, on the Leica M240. When I tested the Zeiss 35 mm f/2 Biogon ZM on the a7S, I thought it was the worst-case lens for the camera. Wrong. I received a request to try the Leica 28mm f/2.8 Elmarit ASPH on the a7S. “Why not?” I thought, but I didn’t really… [Read More]

I re-ran the tests of the previous post with the WATE set to 21 mm focal length. The Expodisc images: f/4     f/11 f/16 The corners are fine. The garden scene: The upper right corners:   More than a bit soft, but not as soft as at 16 mm. OK The best all around f-stop… [Read More]

A reader wrote in to say that his WATE (aka Leica 16-18-21mm f/4 Tri-Elmar ASPH) had blue corners when used on the Sony a7. I thought I’d try the lens on the a7S. Expodisc shots at 16 mm: No corner casts to speak of. My usual scene at 16mm: The upper right corner: Soft, like… [Read More]

I ran a similar series of bookcase pictures as the ones I posted earlier today, only with 3 stops higher ISO settings. I put a Zeiss 35 mm f/2 Biogon ZM on the Sony a7S, using a Novoflex adapter. I put the camera on a big RRS carbon fiber tripod. I set the ISO to… [Read More]

When I post flat-as-Kansas corrected SNR vs ISO curves like I did yesterday, I often get emails saying, “That can’t be right. Show me some pictures.” I always oblige. I put a Zeiss 35m mf/2 Biogon ZM on the Sony a7S, using a Novoflex adapter. I put the camera on a big RRS carbon fiber… [Read More]