wfrank wrote:
Here are some street efforts from today, trying to fix focus on (mostly) walking people. Wideopen CY 100/2 and 5D2.
Nice set of street scenes! P100 wide open is really impressive, especially the OOF blur. Did you correct vignetting? The 1-stop drop into the corner is hardly noticeable.
Just wondering if anyone here has read the "Is this sensor or lens reflections" thread? The problem is with a Leitaxed ZF21 on a Sony A850. Anyone here experienced any internal reflection issues with the ZE/ZF21? Or, does the A850's sensor reflect more than most other sensors?
I don't recall having seen anything like that with either ZF21 or ZF.2 21 on my D3. It is not impossible that I could provoke it, but I haven't seen it in normal shooting for a couple of years now.
It's a crop, the seagull is in center of the original shot. The bird is in good focus though not perfect, perhaps 10 mm off if I should guess. What I find curious is that some of the doves (the far left two) are quite in good focus too. They're much closer.
This may be a stupid question, but this must be strong field curvature going on, right? Since I focus through a precision matte (EG-S) - I can set focus in any part of the screen. As I rarely shoot flat objects I simply dont bother too much about things like field curvature. But here it shows up as a quite odd effect, if it is?
Superficially it looks like, but I wonder. That is quite a bit of curvature for a 100... Maybe the plane of focus is slightly closer than the gull, and the pigeon is slightly farther away than it looks due to the arrangement of the other pigeons?
I bet all things considered they are in the same plane of focus, I think that is too much curvature for a 100 prime. 3-4 of the pigeons are in better focus and they are behind the others.
Thanks. I think you all are right, it's a mixture of a number of phenomenons going on. Also, I did straighten the image - and the result is probably also contributing to the tilt/shifted curvature - heres the full image, un-cropped and un-straightened.
Right! Here's another CY 100/2 observation from same minutes. Distance is about 2m and the average DOF calc says DOF is about 5 cm. I'd say it's more like 1 cm for this lens - for a webres image here at FM. Also notice the 0 vignetting in this wideopen shot.
(could have been a good dove shot with a tasteful crop if I hadnt cut the feet, this is SOOC)
