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#181
09-08-2012, 07:48 PM
Thanks for the link. I just tried the test for my Sigma 30mm. I didn't know how to measure 45 degrees from chart to camera lens. I tried to guesstimate and use a protractor on my android phone. Hard to get it exact. I tried the test also on my Canon 50mm 1.8 and it passed on my estimated 45 degree angle. Then tried the Sigma and it seems off about 22-26mm front focusing. How did you get 45 degree angles? Just taking regular pictures it seems the colors on my nifty fifty is a lot nicer than the Sigma. If I send back to Unique can they tell I took how many photos I took with it already? I just want an exchange. Thanks. |
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Multi-Quote| 09-08-2012, 07:48 PM | |
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#182
09-09-2012, 01:10 PM
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#183
09-09-2012, 02:13 PM
I am not sure how others do it, but first of all, you don't have to have exactly 45 degree angles to test it, it is mostly just to give you the best view with the 45 degree angle is all when you check for the focus issue. As for how I do my 45 degree angle, i just use a piece of paper, fold it once, that will give you a perfect 45 degree angel, then i just line that up with the lens and to get my 45 degree, not exactly perfect, but again, it should be good enough to test out the focus issue. |
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#184
09-09-2012, 04:38 PM
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My 17-50 came in on Tuesday, was able to check it out today and I have zero focus issues.
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#185
09-09-2012, 06:09 PM
there is a reason why you need to send the body in. |
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#186
09-09-2012, 07:03 PM
I might exchange it with Unique Photo. Is there a way they can tell how many counts were taken? Does it matter? I didn't find any information about that in their returns section but someone said it needs to less than 200 shots. I think I just slightly went over that. Thanks |
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#187
09-10-2012, 07:02 AM
Can they tell if it's under 200 clicks for a lens? I know cameras have counters but not sure about lenses. From googling it seems like they can't. I didn't see that and went over. If so I will have to send it to Sigma. If Sigma calibrates this lens will it mess up my other lenses calibration? Last edited by yazyazoo; 09-10-2012 at 07:23 AM.. |
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#188
09-10-2012, 07:35 AM
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Bought sigma lens for the first time(30mm f1.4) totally impressed!!!!. the color the detail etc awesome.
Sign me up for the next sigma sale.  Thank you. |
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#189
09-10-2012, 09:48 PM
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#190
09-11-2012, 12:42 AM
1) Canon 24-105mm IS 2) Canon 70-200mm F4 IS 3) Canon 100mm IS 4) Tokina 11-16mm All lenses were tested for front/back focus on the body and all came out spot on. |
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#191
09-13-2012, 05:46 PM
I did the same as you. My 10-12 lenses work well on my 3-4 cameras (sometimes the inventory is in flux) and the Sigmas I bought all misfocused on all the cameras. Having said that, I did document my Sigma experience (lots of photos with a tripod) and sent the lens back to Sigma for calibration. It was not a speedy service but it was returned properly calibrated. So they are able to calibrate it correctly WITHOUT your camera. However, I wasn't too impressed with the Sigma 50mm f/1.4 and sold it a few weeks later. |
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