Canon’s Testing a 75MP+ Pro DSLR

Started Jul 21, 2013 | Discussions thread
Great Bustard Forum Pro • Posts: 42,270
Re: Eh?

SubPrime wrote:

Great Bustard wrote:

The 1.6x would only apply to the center of the frame, which is always the sweet spot. The corners are what suffer.

The pixel size of a 75 MP FF sensor would be the same as the pixel size of a 29 MP 1.6x sensor. Whether or not the corners suffer is another matter all together, but, as I've said many times before, it doesn't really make sense to talk about corners if they are outside the DOF, and when we compare FF to 1.6x at the same DOF, the corners of FF generally come out ahead.

Wrong on both counts.

Actually, not really, though.

The gratest criticism of the 16-35 (1 and 2) is that it suffers from soft corners.

Except, at the same AOV and DOF, the 16-35 / 2.8L II on a 5D2 outperforms the 10-22 / 3.5-4.5 on a 50D.

The Nikon 14-24G had legendary status for it's corner sharpness (even at 24 mpx) until the D800 came along and revealed softness in corners.

Except the 14-24 / 2.8G on a D800 outresolves any other body using the lens.  Weird, huh?

The reason the TSE17 has received such rave reviews is because it is so sharp corner to corner.

The 16-35 / 2.8L II at 16mm f/8 resolves as well as the 17 / 4L TSE at f/8 when not using the special TSE functionality, and almost as well at f/5.6.  Corner sharpness matter much wider than f/5.6 on FF?

The Nikon 70-200 VR1 ot glowing reviews on 1.5x crop cameras, but revealed soft edges and vignetting on FF.

Indeed.  We can always find a lens that performs poorly on FF in the corners if that's what we're looking for, but the point here is that most aren't looking for such a lens, that the corners matter only when stopped down if only for DOF reasons (an exception being astrophotography), and that FF has plenty of lenses that resolve more in the corners than smaller formats, if corner sharpness is important to you.  After all, I've not heard of landscape photographers ditching FF for smaller formats, have you?

And, you know what?  Add more pixels, and the resolution will only increase, never decrease.

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