Originally posted by WPRESTO If you want to get closer with the Tamron = higher magnification, you might try a Raynox unit. The quick attach device will attach one in a flash. With the 150 Raynox you'd be at eight inches with the lens focused to infinity, with the 250 you'd be at four inches before you started focusing the lens closer. The Raynox are not too be thought of in the same breath with ordinary single-element close-up filters. The IQ with a Raynox competes easily with dedicated macro lenses and can be superior to using extension tubes. Track down the Raynox thread on PF for examples.
Yes, the Raynox on macro lens is a great combination that I've just started exploring with my 250. Here are some with a Tamron 52BB 90mm f2.5 and the Raynox 250:
And some from today with the 250 on my Sigma EX DG 70mm f2.8:
and 100% of the above, rotated 90 degrees:
The Sigma 70mm is no slouch on its own, either:
100% of the above:
...and again, 100%. You can see the sawtooth edges of the scales on the wing.