...related to the Diffractive Optics lens' physical structure? Just curious. Very pleased with lens sharpness and performance otherwise. The perfect travel lens. No, the problem is not with the lens. ...
...sharp macro photos (but manual focus as autofocus does not work with the 105mm). But put the TC-17E II and 70-200mm and autofocus only sporadically works. Most of the time I get chattering over close ...
...70 along with the canon 550d. It looks to me not sharp, not crisp, looks worst like the older 350 with the normal 18-55 canon. Is this normal for sigma? If you bought these locally, this would be a ...
...70-300mm IS USM lens which has been working ok. On the XSI all photos are blurry. My 28-135 lens works ok on the XSI.What could cause this problem? Good Afternoon, if I'm to understand your problem ...
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