04-13-2011, 10:21 PM
[quote name='mst' timestamp='1302732501' post='7620']
DOF is rather thin at 300mm, especially with subjects very close.
The sharpness isn't impressive, but honestly that's not really surprising at f/22, where diffraction eats away lots of resolution already.
If possible, try to shoot something similar again with f/11 or less.
-- Markus
[/quote]
Hi Markus,
I did several of these shots at f11, f16 and f22... On several of them the focus was clearly out... all the f11 shots were worse than these three. Two of these are at f16.
One of the things I find difficult to understand is that I took each shot twice, using the remote. In most cases the focus was off in the first, the second sharper. Does the camera re-focus using the remote (I didn't think it did). Could something else cause camera shake in these circumstances - not much wind but they were long-ish exposures?
I did these after trying hand-held at f5.6 with VC, which weren't good at all.
So, do you mean the sharpness is less than you'd expect from this lens with the D7000, (+ mounted on a tripod, using remote and mirror-up).
I know this isn't good testing... just wondered if these pics gave any indication
I'll take more shots at the weekend with better light, faster shutter speeds, etc.
Ian
DOF is rather thin at 300mm, especially with subjects very close.
The sharpness isn't impressive, but honestly that's not really surprising at f/22, where diffraction eats away lots of resolution already.
If possible, try to shoot something similar again with f/11 or less.
-- Markus
[/quote]
Hi Markus,
I did several of these shots at f11, f16 and f22... On several of them the focus was clearly out... all the f11 shots were worse than these three. Two of these are at f16.
One of the things I find difficult to understand is that I took each shot twice, using the remote. In most cases the focus was off in the first, the second sharper. Does the camera re-focus using the remote (I didn't think it did). Could something else cause camera shake in these circumstances - not much wind but they were long-ish exposures?
I did these after trying hand-held at f5.6 with VC, which weren't good at all.
So, do you mean the sharpness is less than you'd expect from this lens with the D7000, (+ mounted on a tripod, using remote and mirror-up).
I know this isn't good testing... just wondered if these pics gave any indication
I'll take more shots at the weekend with better light, faster shutter speeds, etc.
Ian