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 p.2 #15 · Canon 40D sharpness issue | |
dhphoto wrote:
I have to say, to me this is a clear case of user error.
Your shutter speed is too low, you are not properly focused on your subject, you are using the softest possible picture style and you won't use RAW.
Not much wrong with the gear IMHO, digital slrs are good, but they aren't magical yet
David
I have to agree with David.
105mm, f4, 500 ISO, 1/25
First off, try to stay away from "in-between" ISO numbers like 500, 640, etc. More often than not they cause image degradation, in my experience. Stick to 100, 200, 400, 800, 1600 (and 3200 if you are inclined to do so). For your sample shots, I would have started at 1600, then bumped my shutter speed up two stops.
If you're shooting at 105mm, you should be shooting at something faster than 1/25th. If I recall, the 24-105 IS is good for three stops of help, which *should* mean that one can hand-hold the camera down to 1/15th, but in my experience, you have to be very well-practiced and using good technique to be handholding 1/15th shots.
If you were to follow the 1/focal length rule, then you should be shooting this scene at 1/125th. Given you have a 1.6 crop sensor, your shutter speed more accurately should have been 1/(105 x 1.6) = 1/168! At 1/125th, with IS, you should have a stable picture. I would think that you could even get down to 1/60th, but that would be pushing it for a beginner, imo.
Digital images need to be sharpened. If you are in the field, on a deadline, I can understand having your camera sharpening set high, with custom tone settings, so you can just send your images by wire and be done with it. However, for most of us who are not under an editorial gun, I would suggest you use the Neutral Picture Style, set your sharpening to zero for JPG, or even better - start using RAW, and learn to post-process your images (there is a whole forum here on Post Processing filled with some outstanding people who are very happy to help).
Another thing I might suggest is selecting the center auto-focus point, and if you wish to recompose the picture, do so. At f/4 (the fastest the 24-105 goes) on a crop sensor, you shouldn't have too many issues with focus plane issues if you use the "focus, lock, recompose" technique.
Try these things and get back to us.
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