Alley in Pisa, Italy

by Lars Kotthoff

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7
votes
2answers
228 views

Why can only certain Canon lenses be fitted with an extender?

Is there a reason only certain lenses can be fitted with an extender? I'd really love to be able to fit the extender to some of my cheaper lenses.
8
votes
2answers
303 views

Are there any downsides in using 2x extenders?

What are the negatives with using teleconverters?