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Which confuses me. The 500L is f/5.6, and each TC is a one stop loss. Why is it that you lose a whole stop with the 1.4x TC and the same one stop with the 2.0x TC. Is that just because they don't want to say f/10.xxxx?Originally Posted by Rap Sizzle
Yep and I believe the largest aperture setting he could have used is about f/11