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07-12-2013, 04:42 AM   #1
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DA*300 with Tamron 14 Teleconverter

Hi

I would appreciate any experience using the DA*300 f4 with the Tamron 1.4x PZ-AF MC4 Teleconverter

Thanks


07-12-2013, 04:48 AM   #2
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QuoteOriginally posted by RockvilleBob Quote
Hi

I would appreciate any experience using the DA*300 f4 with the Tamron 1.4x PZ-AF MC4 Teleconverter

Thanks
i wasn't happy with it...too slow to focus...ironically it worked well for the da 60-250 but not so good with the 300...found the 1.7 adapter by pentax worked well but you have to focus close and then it will autofocus...was there something specific you wanted to know how it handled because i can check it...i also would not have a problem shipping mine to you to try out ...can live without it for a short time if you want to play with it

Last edited by pearsaab; 07-12-2013 at 04:56 AM.
07-12-2013, 05:06 AM   #3
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I have both the DA* 300 and Tamron 1.4, and agree with pearsaab that it is a little slow to focus. It's quite usable for static subjects, and image quality doesn't seem to be adversely affected, but I've tried it for motor sport and it wasn't great.

It's interesting and encouraging to hear the comment about the 60-250, as that's next on my lens shopping list :-)
07-12-2013, 05:10 AM   #4
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QuoteOriginally posted by pearsaab Quote
i wasn't happy with it...too slow to focus...ironically it worked well for the da 60-250 but not so good with the 300...found the 1.7 adapter by pentax worked well but you have to focus close and then it will autofocus...was there something specific you wanted to know how it handled because i can check it...i also would not have a problem shipping mine to you to try out ...can live without it for a short time if you want to play with it
Thanks - I may get back to you this fall. I bought the adapter with the hope of finding a used Pentax FA*300 2.8 or used Sigma 300 2.8. I do not do enough bird in flight and wildlife photography to buy the Sigma 500 but would get good use out of a 300 if it cold be used to photograph eagles and hawks. From what you describe it would not be that good. I tried just the DA* via a rental and found the auto-focus iffy with the K-5 (it would go off into no-where-land and not return easily). I will try using the K SMC 500 4.5 with the AF 1.7 for eagles this fall and hope it works in good light. I also have the Sigma 150-500 which is pretty good up to 400.

07-12-2013, 05:21 AM   #5
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QuoteOriginally posted by RockvilleBob Quote
Thanks - I may get back to you this fall. I bought the adapter with the hope of finding a used Pentax FA*300 2.8 or used Sigma 300 2.8. I do not do enough bird in flight and wildlife photography to buy the Sigma 500 but would get good use out of a 300 if it cold be used to photograph eagles and hawks. From what you describe it would not be that good. I tried just the DA* via a rental and found the auto-focus iffy with the K-5 (it would go off into no-where-land and not return easily). I will try using the K SMC 500 4.5 with the AF 1.7 for eagles this fall and hope it works in good light. I also have the Sigma 150-500 which is pretty good up to 400.
someone on the site said the af 1.7 worked with the sigma 150-500 although i have never tried it...do you have the 1.7?
07-12-2013, 06:19 AM   #6
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QuoteOriginally posted by pearsaab Quote
someone on the site said the af 1.7 worked with the sigma 150-500 although i have never tried it...do you have the 1.7?
Yes - I have the Tamron, AF 1.7 and the 1.4R for the SMC 500 - lots of adapters. I will have to try the 1.7 on the 150-500 as well as the SMC 500 for eagles. Thanks for the tip.
07-12-2013, 06:25 AM   #7
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QuoteOriginally posted by percy Quote
I have both the DA* 300 and Tamron 1.4, and agree with pearsaab that it is a little slow to focus. It's quite usable for static subjects, and image quality doesn't seem to be adversely affected, but I've tried it for motor sport and it wasn't great.

It's interesting and encouraging to hear the comment about the 60-250, as that's next on my lens shopping list :-)
I don't know what faith to put into the Pentax roadmap but the current roadmap shows a DA Zoom ranging from about 150 to 350. I am hoping that is still in the works and a little faster than f4 and improved auto-focus capability.
07-12-2013, 09:25 AM   #8
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I have a Kenko 1.5x PzAF and it doesn't work well with the AF of the DA* 300/4, but very well (with enough light) with my Sigma 150-500 HSM. My brother also said that it worked well with the DA* 50-135 with big slowdown but my Sigma 70-200/2.8 HSM Macro II is jerky and unreliable at best with the TC.

It seems like guessing the performance with a PZ teleconverter and in-lens motor is impossible without trying it.

07-12-2013, 06:35 PM   #9
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QuoteOriginally posted by RockvilleBob Quote
Hi

I would appreciate any experience using the DA*300 f4 with the Tamron 1.4x PZ-AF MC4 Teleconverter

Thanks
I'll agree with the others: The DA*300/Tamron TC combo isn't effective -- autofocus is slow and hit or miss. I've owned a bunch of teleconverters in the search for extra reach, but I now own none. The Tamron 1.4 and Sigma 1.4 were the sharpest, but in my experience the conditions had to be nearly perfect (plenty of light, camera on tripod, stationary subject, and mirror locked up) to get results from them that were visibly better than cropping to the same field of view and postprocessing for sharpness. In everyday use under imperfect conditions, my results from cropping were nearly always better than my results from using a TC. This is with 500mm lenses. Things might be different with shorter lengths.

Russ
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