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I may have gotten a bad Canon lens. Thoughts? EF-S 15-85 - Page 3

post #21 of 53
Throw it on a tripod and shoot some test charts.
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post #22 of 53
my bad. yeah, well for that price you should jump up to a 17-55 2.8 IS. they go for $900 used.
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post #23 of 53
Quote:
Originally Posted by MistaBernie View Post
Didn't think to open it up in DPP - but that shows it was on auto focus point selection. I don't trust auto point selection pretty much ever.
The camera was on continuous shooting mode and AI focus mode too =(

Quote:
Originally Posted by r31ncarnat3d View Post
Slow day in the ER?
worked almost 90 days strait (86) and my attending said i can't do that anymore lol
Edited by Dream Killer - 11/5/11 at 1:14am
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post #24 of 53
Thread Starter 
Quote:
Originally Posted by Dream Killer View Post
The camera was on continuous shooting mode and AI focus mode too =(



worked almost 90 days strait (86) and my attending said i can't do that anymore lol
AI focus is automatic switching between servo and one shot focus. It says in the manual that it will behave like one shot focus when you have a subject that is still and it will switch to servo focus when you are tracking a moving target. Don't think that has to do with anything.

Also I usually shoot with continuous shooting mode on because I do a lot of bracketed exposures for HDR
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post #25 of 53
Quote:
Originally Posted by killeraxemannic View Post
AI focus is automatic switching between servo and one shot focus. It says in the manual that it will behave like one shot focus when you have a subject that is still and it will switch to servo focus when you are tracking a moving target.
Just use One Shot mode for static objects. AI Focus is missing on pro bodies for a reason.

Quote:
Also I usually shoot with continuous shooting mode on because I do a lot of bracketed exposures for HDR
Ugh, HDR.
post #26 of 53
Quote:
Originally Posted by Dream Killer View Post
worked almost 90 days strait (86) and my attending said i can't do that anymore lol
That CAN'T be good for you...

Anyway, OP, lens looks fine, don't see any issues.
post #27 of 53
One other piece of advice. Have you tried shooting in RAW? Especially if you are going to do post processing this will help you get a the end product that you had in your mind.
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post #28 of 53
Quote:
Originally Posted by killeraxemannic View Post
AI focus is automatic switching between servo and one shot focus. It says in the manual that it will behave like one shot focus when you have a subject that is still and it will switch to servo focus when you are tracking a moving target. Don't think that has to do with anything.

Also I usually shoot with continuous shooting mode on because I do a lot of bracketed exposures for HDR
based on my experience with focus systems (1dsmk2, d700) one-shot focus and single shutter mode is more accurate. the camera knows you're in the continuous shutter and ai focus mode and will sacrifice focus accuracy to get you more fps.
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post #29 of 53
Thread Starter 
I was looking through some photos from my powershot 300hs and it seems like it is clearer at %100 crop than this lens was. Can post some examples if anyone is interested.
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post #30 of 53
1. Did you downsize the images from your T1i to the same pixel dimensions as the PowerShot's output?

2. Did you test sharpness by mounting the camera on a tripod, using live view + 10x magnification to obtain precise focus?

3. Have you looked at other sample shots using your camera/lens combo?

4. Why does it matter what it looks like at 100%? Do you have any idea what size the print would have to be, and how close you would have to stand to it for a 100% on-screen view to be representative?

Your methodology is flawed if you haven't done these things, and your lens' return trip to Canon will end up with a speedy "No Fix Required" turnaround.

http://www.the-digital-picture.com/R...ns-Review.aspx
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