05-04-2013, 04:36 PM
Quote:I have looked at 100% and can spot nothng. It is one speck and there appears to be another even tinier speck next to it. As far as I can tell the defect is not having a negitive impact on picture quality. I agree that a decentered lens would be much worse. Unless, somthing shows up in my images I will keep the lens. Thanks for your help.
I think you misunderstand; the only way someone is going to find the 'flaw' due to a single 'dot' is if they look at the image with at 1:1 and know exactly where to look (such as masking with a different lens) and even then they might not spot a difference. Your talking about something (if i understand your description) that is smaller than a speck of dust. It is possible (though unlikely) that such a flaw could catch a ray of light and create a streak but it would have to actually be a fairly deep defect (such as a nick in the element) which I doubt from your description.
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Believe me as someone who obsessed over new equipment I've been down this path of fret more than once. The optical defect of decentered lens is far greater.
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Please ignore what I wrote if the mark you are talking about is significantly larger than 2 or 3 specks of dust.