It is the highest DxOMark rated camera that you can mount an EF lens on (via an adapter.) Its overall score tied the D800 (95 points) and it was one point behind the D800E (96 points.)
D800E 96 points
a7R 95 points
D800 95 points
1DX 82 points
5D III 81 points
DxO is saying the sensor in the a7R is the SECOND BEST THEY HAVE EVER TESTED. One can argue over the granular measurements that make up that score, whether or not DxOMark is a good system to measure sensor performance (yada yada yada), but at this point it\'s the only \"scientific\" comparison we have right now.
Yes, AF will be worse than the 1DX and 5D III. I think David summarizes well who will find AF acceptable and who will not (based on what type of shooting they do.)
Canon has a sensor problem, especially for those who are looking for more DR and resolution. Right now it\'s the achilles heel in their lineup. It does not mean they are not top of the game on AF, or in other areas....it just means they are vulnerable right now when it comes to certain photographic disciplines (like landscape photography.) If AF is low in the list of importance for that segment, it\'s hard to justify the price to upgrade from a 5D II to a 5D III for example (really applies to me...incremental sensor improvements..but vast AF improvements.) While the 5D III is a much better camera overall, the areas of dramatic improvement are low priority in the list of things that are important to me.
So bottom line this is no way people are going to agree on this as it all depends on the priority one places on each of these features. Want a better balanced solution, get the 5D III...want to shoot sports or BiF....get the 5D III....want more resolution and DR....get the a7R....want a smaller camera....get the a7R.....want better battery life...get the 5D III. You could do this for every measurable feature.
If Canon can get out of the rut they are in with sensor design, then the only real gap is no FF mirrorless solution. Which seems to be less of a challenge to overcome then sensor design.
While adding PDAF to the last APS-C sensor is an improvement, it\'s not the breakthrough in image performance. When and if they close the gap, the conversation changes.
-Tim
Nov 02, 2013 at 06:16 AM
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