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Forum: Pentax SLR Lens Discussion 02-01-2016, 03:33 PM

Macro lens bake-off!
Posted By Des

Replies: 43
Views: 5,836

Yes that's what I had in mind. I haven't tried this myself but some people have got good results: https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/188167-tele...2-8-macro.html

If you can be bothered to test the macros with the 1.7x TC I think macro shooters would find it useful. It introduces a comparison of the same lens with and without TC.

Identical to the Promaster Spectrum 1.7x (also basically a Tamron design), according to the TC guru: Rokunar MC 1.7x AF teleconverter???: Pentax SLR Talk Forum: Digital Photography Review
Real magnification seems to be about 1.5x: Teleconverter magnification comparison. (5 imgs): Pentax SLR Talk Forum: Digital Photography Review
Reviews are positive: Promaster Spectrum7 AF 1.7x Lens Reviews - Miscellaneous Lenses - Pentax Lens Review Database

Forum: Pentax SLR Lens Discussion 01-31-2016, 02:23 PM

Macro lens bake-off!
Posted By Des

Replies: 43
Views: 5,836

Sounds great.

Only extra thing I could think of would be to add tests with a teleconverter if you have one.

But you are already going to a lot of trouble - thanks for undertaking it and sharing.

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