Would agree with Johnsey, I have the 17-40 for landscapes and the 70 - 200 f2.8 for wildlife and stick on a x2 extender when needed! The 70-200...
Had a similar issue using a x2 Canon extender on a 7d mark ii body with 70-200 f2.8 - found that the lens/extender needs to be attached with the...
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