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Philip. And anyone else. How do you find the a7 compares with the NEX7? This is a key question for me as it is becoming clear that the new cameras are no better with LM mount wide angled lenses than is the NEX range. However, they still have interest for me because they can use legacy SLR manual lenses at their correct focal length without worrying about the issues that affect Biogon type lens designs. That said, I would see little point in upgrading from my NEX 7 unless there is a significant uplift in sensor performance with regard to IQ and low light behaviour. I am also very interested to know if you find the EVF in the A7 to be an improvement on that of the NEX 7, particularly in low light where the NEX7 EVF is pretty poor.
On another matter dpreview has just done a fascinating studio comparison between the a7, a7r, d800 and d7100 in jpeg and raw. There is a large number of iterations both for ISO and for cameras and the widget allows you to focus on different areas of the very comprehensive studio scene for comparisons of absolute behaviour. these are shot with adapted fast 85mm lenses for full frame and 50mm (75 eq) for crop frame, all at f5.6. Unfortunately there is no option to include the NEX-7 but the NEX-6 can be included and has significantly weaker behaviour than the a7(R).. However, I expect that resolution on the NEX-7, with its higher pixel density than even the a7R, would compare very favourably with both new cameras, albeit with a cropped perspective. The jpgs are good but clearly there is a lot of noise reduction going on. The raw files give a much better indication of comparative strengths. Interestingly, in many ways I think this demonstration, admittedly studio testing rather than real life, tends to favour the a7 rather than the a7r. The Canon 5D3 comes out very well, rather better than the D800 in my view. I was also fascinated by the poor comparative performance (in my opinion) of the RX1R across the ISO range to the extent that I wonder whether it has been mis-focused.
I went to our local stockist and tried out the A7 and have now been able to compare the NEX-7 and A7 with real life photos. Direct comparison is still not possible for me because I have no way presently of converting the A7 raw files and jpg vs jpg may also disguise differing internal algorithms. However it is evident, whether comparing LR4 adjusted Nex7 raw files with A7 jpgs or jpgs from each camera , that the IQ from the A7 is significantly better at mags up to 100% (I saw no point in going further). By comparison the Nex7 files are muddy and lack clarity. I took the comparison photos within 15 minutes of each other and used the Rokkor-M 40/2 CLE at 5.6.
Edited on Nov 22, 2013 at 03:58 PM · View previous versions