I was more refering to the zoom lenses.
Zooms, primes -- it makes no difference. Take a look here:
http://forums.dpreview.com/forums/read.asp?forum=1018&message=26764202
We can see that the both the 16-35 / 2.8L ($1000) and Tamron 28-75 / 2.8 ($400) do quite well in the corners by f/11 (f/5.6 on 4/3), and the tokina 20-35 3.5-4.5 II (a total POS lens) did fairly well, too.
In fact, I was quite surprised by the performance of the Tamron, since Amin says that the Tamron is not a strong performer in the corners at 28mm:
http://forums.dpreview.com/forums/read.asp?forum=1022&message=25387839
I do have a test gallery of the lens, but it only goes from f/2.8 to f/5.6 (f/1.4 - f/2.8 on 4/3), if you're interested:
http://www.pbase.com/joemama/tamron_2875__28
Yes, when someone prefers to use prime lenses and uses the feet to
zoom, and uses a tripod to stabilise, fullframe has no disadvantages.
Actually, many of the zooms are as good, if not better, than the primes in the corners stopped down.
But often its not possible to use the feet to zoom ( as in my case ).
For sure. However, as I mentioned in the other thread, I don't know what kind of pics people are taking where they expect sharp corners at the more shallow DOFs. A big reason that you need to stop down so far to get sharp corners on 35mm FF is not merely for the improved lens performance, but because the corners are out of the DOF at smaller f-ratios.
Still, I've yet to see a
single image where the corners mattered and the person could not have stopped down to have gotten sharp corners. I can imagine such a situation, however: an architectural pic in low light. However, for such an image, you would be using a tripod, anyway, right? So stopping down would be a non-issue.
Anyway, as I say, if you have any examples of pics where the extreme corners actually matter that 35mm FF could not have stopped down to have gotten, I'd really like to see them.
Allow me to link the singular image I have where sharp corners
might matter, and I did not stop down enough to get them, as the corners mattered less to me than the noise in the image:
Canon 5D + 16-35mm / 2.8 @ 30mm, f / 5.6, 1/100, ISO 800
http://www.pbase.com/joemama/image/63290556
For sure that pic would have been better stopped down using an IS lens (and better still with a tripod). But, I don't own the 24-105 / 4L IS, and don't use a tripod, so I was SOL. : )
So, for people for whom shots like that are common, and they do not use a tripod, then I agree that 4/3 may be the better option. But if they used a tripod, then the advantage, as you note, goes right back to 35mm FF (in terms of IQ).
--
--joe
http://www.josephjamesphotography.com
http://www.pbase.com/joemama/