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Tokina RMC Doubler
Latest Review Posted Tamron 278D AF 80-210mm 1:4.5-5.6
This is an incredible performer. I've been using some software called MTF Mapper to profile all my lenses (so many lenses, all Vivitar S1's, Kirons, Tamron SP's etc.) Given that the sensor on the K7 is capable of resolving 75lpmm, you need a lens that can do the same....this lens can at 135mm f8. There are not any other lenses which come close. The lens is not as great at the short or long end, but at 135mm, wowsers, this lens is amazing.

Tamron 278D at 135mm f8, MTF25 resolution

Tamron 278D at 135mm f8, contrast at 20, 40, 80lpmm

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