The new Sigma 24mm f/1.4 Art lens is getting a lot of good press these days, and I thought it might be instructive to do one of my informal tests that included it. I rounded up the following 24mm lenses: Sigma 24mm f/1.4 DG Art AF-S Nikkor 24mm f/1.4 G ED AF-S Nikkor 24-70mm f/2.8… [Read More]
Archives for April 2015
Heavy and light tripods with Sony a7R, a7II
For the past few days, I’ve been doing tests of image sharpness with the Sony 70-200 f/4 OSS FE lens mounted on a Sony a7R and a a7II camera. I’ve been using a really sturdy tripod — the RRS TVC-43 — and head — the Arca Swiss C1 Cube — for the testing when I’ve… [Read More]
a7R and a7II camera motion blur compared
Two days ago, I posted data for the Sony a7R and a7II paired with the Sony 70-200mm f/4 OSS FE lens. I did tests on a tripod and handheld, and with and without image stabilization. Slicing and dicing the data another way, we can see when the a7R shutter shock degrades sharpness to a7II levels,… [Read More]
Sony 70-200 f/4 OSS lens on Sony a7II
In the previous post, I reported on the performance of the Sony 70-200mm f/4 OSS FE lens on the a7R camera, with and without OSS turned on. In this post, I’d like to present similar results for the same lens on the a7II, with and without in-body image stabilization (IBIS), and with electronic first-curtain shutter… [Read More]
Sony 70-200 f/4 OSS lens on Sony a7R
Rishi Sanyal, one of the reviewers on DPR, mentioned that he was seeing parasitic interaction of Sony a7R shutter shock and optically-stabilized (OSS, in Sony-speak) lenses that meant that users were often better off leaving OSS turned off. I thought I’d do some testing. I mounted a Sony 70-200mm f/4 OSS FE lens on an… [Read More]