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part of the editing process whereby unwanted portions are removed from the edges of an image
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What will be my aperture with a 2× teleconverter? [duplicate]
I have a Canon 60D (crop factor 1.6x) and an 85mm f1.8 prime lens. Now I want to add a 2x teleconverter and attach the 85mm lens to it.
My question is: What will the effective aperture be?