jcolwell
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 Re: Tamron SP 90mm 2.5 Macro | |
It\'s probably a very nice lens, but I don\'t think it will be better than the Canon EF 100/2.8 macro. I currently have the Canon 100/2.8 Macro USM and Mamiya 645 A 120/4 APO Macro (both go to 1:1). I\'ve owned the Tokina AT-X 90/2.5 Macro, and Vivitar Series 1 90/2.5 Macro in the past. All of these 90/2.5\'s (including the SP) only go to 1:2 without a matched 1:1 Extender (which I had for both the Tokina and Vivitar). The Tokina/Vivitar (same optics, same factory) is one of the sharpest lenses ever tested at the old photodo, with average MTF = 4.6, while the Tamron SP 90/2.5 tested at 4.2 (the newer Tamron SP 90/2.8 is 4.3). I\'m very happy with the Canon 100/2.8, even in comparison with the old masters, as I found they had relatively high CA. I think the Mamiya is better that any of them, but it\'s slower at f/4, so there\'s a tradeoff.
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