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The biggest differences between the two lenses can be seen at 200mm and f/2.8, but that is where many of us use a 70-200 f/2.8 the most. If you ever plan on using a 2x extender with your 70-200 f/2.8, the difference between the two lenses at 400mm are remarkable. In the end, everyone has to decide for themselves what the relationship is between "close ...


Depending on which Tamron lens you have there could be a switch on the left side of the lens itself to toggle between "AF" and "MF". Make sure it is still set to AF. There are various ways to change the focus mode of the camera itself, but that can vary with the button configuration. You'll need to go through the manual and check the settings in the menus ...


The Sony TCs are designed specifically for Sony G lenses and CANNOT be used with other lenses without risk of damaging both the lens and the TC - this is due to the extremely tight tolerance (about a mm gap) between the lens' rear glass and the TC's front glass. Likewise the new Sigma APO TCs are specifically tailored for a limited set of lenses such as the ...

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