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I hope I'm in the right part of the forum. I know there are some sites that give you mathematical numbers about depth of field when you punch in different numbers, but I don't really understand what I'm seeing. I'm interested in buying an extender because I do need the extra reach. I'd use it...

Canon discontinued 200mm f1.8 IS USM when it was 14 or 15 years of age - which means you can "no longer fix it" (or even without the quotes?). I have a great opportunity of purchasing a mint condition 300mm f2.8 IS USM for a ridiculous low price from a guy 100km away from me, but since this...

Hello, this may be a stupid question, but I'm seriously wondering.. can you put one LP-E6 and one LP-E6N into the battery grip? I don't want to potentionally destroy something.