Groan. Groan again. Groans of empathy. The softness. There is a
continuum from CMOS "silky smoothness" through softness and on to
blatant OOF. Figuring out what is...
(a) Me (camera shake)
(b) Misfocus (slight, gross, something in between) by the AF
(c) Softness from my inexpensive lenses
(d) Good ole CMOS smoothness
... has vexed the hell out of me. I've been trying to work through
them methodically. To understand (c), I bought a Canon 50mm f1.8
prime. I bought it for the optics, but the big aperture/shallow
DOF made something
very clear: I had a front-focus issue. I
hadn't done structured tests previously, but I did so immediately
after seeing initial shots at f1.8. Here's my thread...
http://forums.dpreview.com/forums/read.asp?forum=1019&message=5385762
Last night, I exchanged my 10D. The new one still front-focuses,
but to a lesser degree. Updating from prior results...
- Canon 50mm: 0.75" FF (down from 1.5"), shooting distance 24" (f1.8)
- Sigma@28mm: 1.25" FF (same), shooting distance 16" (f4.0)
- Sigma@70mm: 0.25" FF (down from 1.5"), shooting distance 32" (f4.5)
- Sigma@135mm: 0.5" FF (same), shooting distance 36" (f5.6)
For grins, I also picked up Canon's 80-200 F4.5/5.6 II while
exchanging the camera (cheap; even cheaper for Circuit City
associates!). It has some tendancy to FF as well, but will often
nail the focus. Focus target is almost always in the DOF.
What am I doing from here? Gonna keep this body, for the time
being. My 30-day return period was reset yesterday, so I have some
time. I'm going to watch for the firmware upgrade next week, read
what Canon sez about it, then wait for findings from early
adopters. But,
most importantly , I am going to put down my ruler
and shoot a ton of pix this weekend, to see real-world results with
new body and lens.
I'll let you know findings. Knowing what this camera can do, I am
determined to get this all worked out and get this focus thing
out of my head! Got my fingers crossed for 1ofYouz as well. :-D
Joe
I don't know if you saw my post on focus tests yesterday.
http://forums.dpreview.com/forums/read.asp?forum=1019&message=5390072
I would be interested in your opinion due to your recent experience
with 2 different cameras. Based on the feedback I'm going to
retest with MAC's "gum on the road test" lol, and also try bolding
the target line on the scale and trying again. I'm getting
inconsistent results with my 10d. When its sharp its wonderfully
sharp. But a large % of my images are just a tad off. And I don't
think its "softness" it seems more just barely OOF to me. If I
take one of my images that seems to be nailed focus wise I can get
satisfactory sharpening or not even bother to sharpen it at all and
it still looks great. If its slightly OOF no amount of sharpening
really makes it look sharp. Based on my test results tho, where I
got opposite problems between the lenses it seems like it would be
a lens issue not a camera issue. What do you think? Thanks,
Cindy--
CindyD or SarahD
If one of us is laughing, and the other one isn't, one of us must
be wrong...