hey guys!
After a quick micro-adjustment to the 7D, i've been trying to take portraits of my siblings. I am having such a hard time keeping their eyes in focus. It's only with this camera that i'm experiencing this issue.
I've tried Single AF point, AF point expansion and Single AF spot. I've also tried Single shot, AI focus and AI servo. My hit rate is about 6-7/10 with the 7D. With my previous cameras, i've been getting a 9-10/10 hit rate with the eyes.
Any tips would definitely help.
-EDIT-
Some more samples...
7D + 85L | 85mm | f2.0 | ISO 1600 | 1/160 (AF using AF expansion - Single shot || Note: i've found this to be the best way to get the sharpest results)
5DII + 85L | 85mm | f2.0 | ISO 1600 | 1/160 (AF using Peripheral AF point- Single shot)
- edit #2 -
I've found a couple of things from the-digital-picture about the 7D's "focus issue" (or lack there of to some people)...
The 7D images are softer than the other DSLRs at the same sharpness setting - repeated testing confirms this. There is no focus error here and the examples use an aperture wider than the DLA. A set of examples processed at a DPP sharpness setting of "2" shows similar sharpness to the T1i and 50D. Also noticeable is that sharpening sharpens the noise which makes it more apparent. Thus, equal sharpness results in the 7D losing some of its lead in the high ISO noise comparison.
..Once again, many comparisons can be made. In this example, the fine details of the fabric better-hides the high ISO noise. The Canon EOS 7D shows a slight resolution increase over the 50D, but again, appears slightly less-sharp at the "1" sharpness setting. Even though the 50D image is slightly sharper, the 7D image is still better than the 50D uprezzed to 7D dimensions. Honestly, the resolution differences are not huge and in my opinion, not a good reason alone (there are many other good reasons) to upgrade from the 50D to the 7D for most. ...
...A sharpness setting of "2" helps the 7D a lot in this example. The 5D Mark II, on the other hand, is a clear winner in this comparison.
...In all cases, in the 7D images are slightly less-sharp than the 50D images when processed with identical settings. Here is a another look at the sharpness and resolution differences between these two cameras...
...I'm guessing that the 7D's anti-alias filter is a little stronger relative to the individual pixels on this sensor compared to the T1i or 50D. And that the 50D and T1i's anti-alias filter are a little stronger relative to their individual pixels compared to the 5D II and some other prior DSLR models...
-EDIT- Feb 8 2009.
I will be exchanging the camera on Wednesday or Thursday night. I'm hoping that i get a better copy.
-EDIT- Feb 10 2009.
I was able to exchange the body for another one... After a few initial tests without any AF adjustment, i realized that the body is performing better than the original 7D that I had. The AF system was more consistent shot after shot...
here are some examples... These shots were doing right after each other. and as you can see, the AF did not focus shift.
NOTE: I haven't done any af adjustment on the body, and i used single AF point for focus.
The exif is as follows: 7D + 85L II @ iso 1600, 85mm, 1.2, 1/160
I will definitely be doing more testing on friday and i will post my results here.
-EDIT - feb 10 2009 (2)
I'll put up more pictures tomorrow with something that's lower in ISO, has less NR for people to be happy.
I'm all about pleasing people.
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