how did you notice your lens sample was defective? was it easily noticeable or did you have to zoom in and do some various tests to verify?
1701754
After the first shooting I used it, it was a failure. It was extremely noticeable it was defective. However, I did also run some lens cal test to verify if I could do some microadjustments, to no ado.
2242622
sorry don't rember ever having that problem ?? but i'll look in the manual tomorrow!! doyou have a correct lens on?
1026016
Do you have a filter on the lens? If so, try it with no filter. Something might be interfering with lens movement.
11116
No...I have not. It could be an issue of of wrong corrective lenses to your prescription.
842336
I haven't but I can tell you this lens is very wide and appears to be coming from a very far distance. it might be a bit too wide & distant to really capture what you want but try it out and let us know how it comes out!
1558941
Are you happy/satisfied with the one you've got? I'm not sure how you can tell but I'm sure there are those who know. My opinion is "if it aint broke, don't fix it". That being said, I am very satisfied with this lens and would highly suggest it.
1692070
Ronald if this question is directed at me I cannot help you. I no longer have the camera, didn't experience any lens or sensor problems and do not have one for sale. Sorry.
1278588
Try adjusting the diopter adjustment on the viewfinder- likely was off. Should view and record in focus.
1419231
Used a small flat head screw driver. Look on the side of each lens and you will see the
1936777
If you look at my prior answers, you will see that I had to have my lens calibrated to my D800 specifically. I don't know that that makes it of poor quality. Once I got it back from Sigma (who were very helpful and quick, by the way), it is absolutely beastly in focus lock, focus speed, and image quality.
767371
I have my camera's IS on and the lenses off. I figure that it would do a better job. I have not tried it the other way. It would be an interesting test. I will let you know how it works out.
2080931
Send it back immediately- Amazon is great about returns. Mine is as solid as a brick and is the best built lens I own. You will see when you get another one back.!
296069
yeah, i had one with a bad focus ring. returned it, got a new one and now it works awesome!
582699
Okay, thanks a lot, new at this and I wasn't sure if the lens quality is the same. I appreciate everyone's help!
37173
mine wouldnt focus, it mustve been defective. see: http://www.youtube.com/watch?v=Q0xpIp2u2cg
1190250
I haven't heard this noise on my lens when focusing. Are your images affected in any way?
874722
I have not, but i would strongly expect a converer to smear detail on the corners. This lens, when focused properly, is very sharp in the corners. I use mine on a Fuji XE1 and now issues at all.