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05-18-2011, 07:32 AM   #1
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Sigma 170-500+1.4X Tamron TC

It's been my experience playing around with the Tamron 1.4 TC and my Pentax 55-300 that I was better off cropping than using the Tele converter. Just for fun I thought I would play around with the TC and my new to me 170-500. Lighting conditions were very good and I shot TAV, f13, 1/800, 700mm, handheld. Focus was fairly quick and not too much hunting considering the TC. Admittedly not supersharp, but not terrible, and I think better than without the Tele converter and cropping. Remember handheld the camera's image stabilization thinks it's a 500 mm lens 700 mm. I shot raw and did a little PP in ACR. These are 100% crops. I think I might find a use for the old Tamron TC yet. Any thoughts would be appreciated?
http://img836.imageshack.us/img836/9165/igp1349.jpg
http://img571.imageshack.us/img571/4466/igp1346.jpg

05-18-2011, 08:49 AM   #2
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For 100% crops...these, I think, are very good for being shot with that lens and a TC. I have a Tokina 80-400, I may have to look for one of these TC's.

Is that the standard Tamron F 1.4 teleconverter?
05-18-2011, 10:22 AM   #3
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Yes I think soIt's the Tamron with the PZ designation which means it has the contacts for automatic focus
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