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11-19-2010, 10:09 AM   #1
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Do I have a problem with Tamron 10-24?

Hi guys,
I'll go straight to the point, I wonder if I should be worried about my Tamron 10-24. When I look directly into it wde open, il looks like this:

It's not evenly open, shouldn't form a perfect circle wide open? The bumps you can see on the periphery are the blades. Is it a normal behaviour for this lens (or any lens for that matter)?
It's still under warranty, maybe I should send it back for checking up... The pictures seem quite fine, I didn't buy that lens for its exceptional sharpness anyway!
Thanks a lot for your help.
Victor

11-19-2010, 10:50 AM   #2
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QuoteOriginally posted by victordeamorin Quote
It's not evenly open, shouldn't form a perfect circle wide open? The bumps you can see on the periphery are the blades. Is it a normal behaviour for this lens (or any lens for that matter)?
Hi victor. It looks as it should (not a perfect circle); however, the photos aren't sharp enough to make a accurate analysis; post some more photos with the lens stopped down ( at f8,... f22) if you can.
11-19-2010, 11:19 AM   #3
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Hey thanks for the quick reply.
I've having a really hard time taking these pics with my kit lens (it's all I've got so far) and low light (in Europe it's already night time). There is no aperture ring on that lens, so it's either wide open (photos) or completely stopped down (I can't take a usable picture of it), actionning the lever with my finger.
However I can tell you the problem quickly disappears when stopped down, I suppose that already at f4 it becomes a regular heptagon (yes it has 7 blades).
Victor

Last edited by victordeamorin; 11-19-2010 at 11:20 AM. Reason: wrong language
11-19-2010, 11:33 AM   #4
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I Have exactly the same lens and it look exactly like yours . I took over 500 photos this summer with it, nothing wrong with it

11-19-2010, 11:42 AM   #5
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Thanks, I guess I should feel reassured now!
Being able to read all these posts and tests on forums (GREAT forums) like this one is excellent on one hand, but on the other hand isn't it possible that it makes us all paranoids and worried we didn't get the best value for our money?
Anyway... I'll keep on hanging here!
Victor

PS. @Manuel sorry, no offense, at first I didn't realize you were a fellow from the old continent as well...
11-19-2010, 12:15 PM   #6
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QuoteOriginally posted by victordeamorin Quote
PS. @Manuel sorry, no offense, at first I didn't realize you were a fellow from the old continent as well...
By all means. Yes, there are people from all over the world in Pentax Forum. Quite extraordinary for a web forum.

Regards
11-20-2010, 01:03 PM   #7
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Viktor, I also have the same lens, do not worry mine looks the same and works 100% ok.
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