>>2922670So I did some more testing with AF and MF in live view, and it's noticeably less sharp than the HD 55-300. going to see how much I can get at a local pawn shop, and buy new DA* 300mm f4. already have a tamron 1.4x tc and want to see how it performs (though I'm not expecting too much) before thinking about coupling it with an HD 1.4x tc.