Tariq Gibran wrote: Ron Pfister wrote: Tariq Gibran wrote:I was curious about this so compared the Imaging-Resource raws from both. Unfortunately, there is still a major variable here at work which is the lens. The A7r is tested with the FE 55 and the D800E with the Sigma 70mm Macro. This results in a slightly different magnification between the two favoring the D800E slightly. Even still, the A7r looks as though it may have a tiny edge.
These are 100% crops with default ACR conversion. D800E on left, A7r on right.
Thanks - yes I saw these. I hope this perceived edge is indeed real. But as you say, making a valid comparison regarding sensor resolution is a difficult task, even if the lenses are the same. Where did you find the RAW files?
In the Imaging-Resource camera reviews, you will find a page with the test images which contains a link for the raws. Here it is for the D800E:
Thanks. Since the crops you had posted were quite a distance from the center of the original images, and because I thought the difference between the A7R and the D800E samples may well be due to lens aberrations, I took a closer look myself. Below center crops of A7, A7R and D800E. The resolution advantage of the A7R over A7 is very obvious. The A7R sample also clearly shows more detail than that of the D800E, but - as discussed - that may well be due to the different lenses used. That said, I prefer the result from the A7R oner the others.
NB: all files were first converted to DNG and then processed in LR4 with default settings except for appropriate sharpening with identical settings for all images. I\'m aware this is somewhat off-topic, but I hope still relevant to everyone\'s interest.
Tariq Gibran wrote: Ron Pfister wrote: Tariq Gibran wrote:I was curious about this so compared the Imaging-Resource raws from both. Unfortunately, there is still a major variable here at work which is the lens. The A7r is tested with the FE 55 and the D800E with the Sigma 70mm Macro. This results in a slightly different magnification between the two favoring the D800E slightly. Even still, the A7r looks as though it may have a tiny edge.
These are 100% crops with default ACR conversion. D800E on left, A7r on right.
Thanks - yes I saw these. I hope this perceived edge is indeed real. But as you say, making a valid comparison regarding sensor resolution is a difficult task, even if the lenses are the same. Where did you find the RAW files?
In the Imaging-Resource camera reviews, you will find a page with the test images which contains a link for the raws. Here it is for the D800E:
Thanks. Since the comparisons you posted were quite a distance off-center, and I thought the difference between the A7R and the D800E samples may well be due to lens aberrations, I took a closer look myself. Below center crops of A7, A7R and D800E. The resolution advantage of the A7R over A7 is clear. The A7R sample also clearly shows more detail than that of the D800E, but - as discussed - that may be due to the different lenses. That said, I like the A7R result best of all. NB: all files were processed in LR4 with default settings except for appropriate sharpening with identical settings. I\'m aware this is somewhat off-topic, but I hope still relevant to everyone\'s interest.
Nov 20, 2013 at 11:00 AM
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