Wickerprints already mentioned this. A TC simply adds another factor or variable to the overall modulation transfer function of the \"system.\"
Depending on your \"output\" MTF requirements and all of the above either the new TCs will help or they won\'t.
They likely won\'t help 4x6\' prints. They likely won\'t help small web images. They \"might\" help in large prints or when viewing 100% image crops (depending on the characteristics of the lenses used in combination with the TC). Results will also vary by sample variation of the TC itself and the lens that its mated with.
For many of us adding these new pieces of glass will not make our existing lens kits noticeably better for our personal applications.
Dec 29, 2010 at 07:34 AM
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