Five Lens rigorous test with Kenko Pro 300 1.4x and 2.0x Telextenders
Albert -
What you say about the light transmission of the Sigma is true, but I believe the quality of the lens image is a function of the physical lens aperature setting iteself, eg. f/13 is f/13 for image quality. Can anybody help me out here?
ps. The Kenko telextenders do read AF-S lenses and Sigma\'s with similar function correctly....it is the older screw-drive lenses that they do not report accurately.
Jul 21, 2010 at 10:35 AM
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