Old 05-26-2008, 09:00 PM   #1
Peter MacCauley
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I was out yesterday taking some pictures with my Canon XTi (with my sigma 18-200 lens attached), and ran into some AF trouble. I didn't notice the problem until i got home and uploaded the pics to my computer. I noticed that several shots (more than the usual 2-3) were out of focus, but not by much. Usually i notice this when i'm shooting and can tell right away if the shot didn't turn out. Fortunately, nothing really important got messed up. But this brings me to my question: has anyone else ever had serious problems with their AF? At the time, it was set to AF servo (that one that tracks moving subjects). To me, the AF seemed a little bit slower than usual, but the lense is less than a year old so i don't anticipate any major problems. Also, if it turns out that something is wrong, i was already planning to replace it, likely with a L-series 70-200 F/4.0 lens from Canon (if anyone could post a few sample pics with this lens or comment on it, I'd appreciate it).

Many thanks, Peter.
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Old 05-26-2008, 10:24 PM   #2
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Quote:
L-series 70-200 F/4.0 lens from Canon (if anyone could post a few sample pics with this lens or comment on it, I'd appreciate it).
I have the non-IS version and it is beyond awesome. Here are some recent shots:
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Old 05-27-2008, 05:49 AM   #3
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Quote:
Originally Posted by Ween
I have the non-IS version and it is beyond awesome. Here are some recent shots:
Well, I sure hope you used a tripod for those shots.
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Old 05-27-2008, 06:46 AM   #4
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Well, I sure hope you used a tripod for those shots.
Hand held. Can you believe it?!?!? At least the doors were closed and there were no FREDs visible.
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Old 05-28-2008, 07:07 AM   #5
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Quote:
Originally Posted by Ween
Hand held. Can you believe it?!?!? At least the doors were closed and there were no FREDs visible.
No way! You're lucky you didn't get a FRED, those are guaranteed to ruin photos....
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Old 05-28-2008, 07:17 AM   #6
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No way! You're lucky you didn't get a FRED, those are guaranteed to ruin photos....
Tell me about it. But truth be told, two of those shots are ruined. They have initials on the nose. Putting initials on the nose is lazy and stupid. From now on, if there's not a full word there, I will not shoot it.
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Old 05-28-2008, 06:56 PM   #7
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Originally Posted by Ween
Tell me about it. But truth be told, two of those shots are ruined. They have initials on the nose. Putting initials on the nose is lazy and stupid. From now on, if there's not a full word there, I will not shoot it.
What about stripes?
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Old 05-28-2008, 07:02 PM   #8
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What about stripes?
It depends...do they slant left-to-right or right-to-left, because that makes a difference. Forget about ones where they slant either side from the center of the nose. That's just dumb.

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Old 05-29-2008, 12:48 AM   #9
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Quote:
Originally Posted by Ween
It depends...do they slant left-to-right or right-to-left, because that makes a difference. Forget about ones where they slant either side from the center of the nose. That's just dumb.

Once I got a shot of one of those are I just formatted the entire card on the spot.
That's how bad those kind of stripes are.
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Old 05-30-2008, 07:11 AM   #10
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Peter - there is some stuff on the L-series 70-200 lens from Canon here as I went this route, as well as places where you can see example pics.

http://forums.railpictures.net/showthread.php?t=6293

I like the lens - very good and use it a lot for nature and animals now as well!
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Old 05-30-2008, 02:31 PM   #11
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Quote:
Originally Posted by Peter MacCauley
L-series 70-200 F/4.0 lens from Canon (if anyone could post a few sample pics with this lens or comment on it, I'd appreciate it).
Image ©
PhotoID:
Photograph ©


Image ©
PhotoID:
Photograph ©


Image ©
PhotoID:
Photograph ©


Those were shot with my XT and 70-200L (no IS), although I did use a monopod for all three of those shots. As Ween has already said, it's a fine product.
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Old 05-30-2008, 06:49 PM   #12
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I glad that I know you guys are joking around. Some poor newbie is pulling his hair out somwhere trying to follow the above guidelines/
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