I don't know if it's been covered in this thread, but what is the focus point coverage? It is one of the worst things about the D700, the focus points are very narrowly distributed not reaching anywhere near the frame boarders making AF-tracking almost useless.
Rodluvan wrote:
I don't know if it's been covered in this thread, but what is the focus point coverage? It is one of the worst things about the D700, the focus points are very narrowly distributed not reaching anywhere near the frame boarders making AF-tracking almost useless.
I'm VERY happy to see 100% VF coverage.
Interesting to find out which digital camera has its focusing point located at the frame boarders, and also focuses at f/8.0?
All I am aware of is the 1/3 rule that most photographers place their focusing point at, and that is as close to the frame boarder. But even so many pro cameras don't even allow it to focus at f/8.0.
hans98ko wrote:
Interesting to find out which digital camera has its focusing point located at the frame boarders, and also focuses at f/8.0?
All I am aware of is the 1/3 rule that most photographers place their focusing point at, and that is as close to the frame boarder. But even so many pro cameras don't even allow it to focus at f/8.0.
You may be right. I was under the impression that the D700/D3's inherited the coverage from the DX formats (D300) which made it more narrow than 'it should be'.
Rodluvan wrote:
I don't know if it's been covered in this thread, but what is the focus point coverage? It is one of the worst things about the D700, the focus points are very narrowly distributed not reaching anywhere near the frame boarders making AF-tracking almost useless.
I'm VERY happy to see 100% VF coverage.
I believe the AF coverage has to do with the limitations on bending light to the AF sensors, which is why the FF spread seems to be less than DX.
Rodluvan wrote:
You may be right. I was under the impression that the D700/D3's inherited the coverage from the DX formats (D300) which made it more narrow than 'it should be'.
Actually, there are more to it than just that.
Most lenses have higher distortion as well as chromatic aberration at its edges, so making it impractical to have the focusing points located at those locations.
cputeq wrote:
I believe the AF coverage has to do with the limitations on bending light to the AF sensors, which is why the FF spread seems to be less than DX.
Yep. Current tech would need a larger submirror, which would likely require a mount change.
Moving phase detect on sensor could change that, though.
I think the 1D-X will have the largest area of focus points but even then they weren't able to make it much bigger than the Nikon system or the current 1D system. 1D array appears bigger because of the 1.3 crop just as the DX cameras appear to cover more area. As people have already mentioned, without some new design changes it isn't possible to have points way out to the edges on a FF camera. And it also looks like the 1D-X had to give up F8 focus just to expand the area by the small amount that they did. (although recent rumours say that Canon is adding F8 back but I'd guess it will not be equal to Nikon's offering of F8 cross point and 10 assist points).
