Lloyd Chambers has reported that the a7R shutter vibration is worse when the camera is in portrait orientation. This makes sense if the camera is mounted directly to the tripod head, or if the mounting is very close to the camera, but my guess is that for long lenses with tripod collars that the effect… [Read More]
Leica 90mm ‘cron on Sony a7R
In the previous post we did some testing that indicated that SLR lenses work well on the a7R. In an earlier post, I found some corner casts with the Leica 50mm f/1.4 Summilux ASPH that surprised me. I have not tested that lens for corner smearing; I’m waiting for the diffuser that will let me… [Read More]
Nikon 14mm on a7R
The Nikon 14mm f/2.8 ED is the widest full frame Nikon prime currently available. It’s downright tiny compared to the AI Nikkor 13mm f/5.6s of thirty years ago, and a tad bigger than the 15mm f/5.6 AI of the same era. It’s fast, with good center performance and OK corner sharpness. It’s not the first… [Read More]
Lens adapter tolerance
The Novoflex Nikon F to Sony E adapter that I used with the Zeiss 21mm f/2.8 is short by about the same amount as the Novoflex Leica M to Sony E adapter that I used with the 24mm f/3.8 Elmar. I got to wondering why the focusing error caused by improper adapter spacing showed up… [Read More]
A little EVF trick
While testing various wide angle lenses on the a7R, I discovered a trick that is useful with any camera with an EVF and focus peaking. It can give you a quick idea of the loss of sharpness at the periphery of an image without making even one exposure. Out of focus, focus field curvature, corner… [Read More]
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