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thibs · 02-01-2008, 01:25 AM

New Tamron ultra W/A announced 10-24 f3.5-4.5: Pentax SLR Talk Forum: Digital Photography Review

Arpe · 02-01-2008, 01:58 AM

Do Tokina or Tamron not do any version of SDM/HSM/USM etc.

thibs · 02-01-2008, 03:45 AM

Originally posted by Arpe

Do Tokina or Tamron not do any version of SDM/HSM/USM etc.

I do not know exactly what you are talking about so I will respond to the 2 possibilities:

* They do not have a Ultrasonic-like tech. They can of course use in-lens motors but no USM thingies.

* I do not know if Pentax does want / will / already license their SDM tech to Tamron. Sigma does not care since they never license anything (reason for compatibility problems). Maybe later mabe never. Pentax never licensed AFAIK their TTL/PTTL protocol, they might not license their SDM tech and even if they do, Tokina/Tamron will proba bly use simple in-lens motors.

**barondla** · 02-01-2008, 08:48 AM

If Tamron was smart they would release their 180 macro in Pentax mount. Only Sigma seems able to build long lenses. Why?
thanks
barondla

02-01-2008, 01:25 AM	#1
thibs Pentaxian Join Date: Jun 2007 Location: Belgium Photos: Albums Posts: 7,001	New lenses for Pentax : the listing New Tamron ultra W/A announced 10-24 f3.5-4.5: Pentax SLR Talk Forum: Digital Photography Review

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02-01-2008, 01:58 AM	#2
Arpe Pentaxian Join Date: Sep 2006 Location: New Zealand Photos: Gallery \| Albums Posts: 4,452	Do Tokina or Tamron not do any version of SDM/HSM/USM etc.

02-01-2008, 03:45 AM	#3
thibs Pentaxian Join Date: Jun 2007 Location: Belgium Photos: Albums Posts: 7,001 Original Poster	Originally posted by Arpe Do Tokina or Tamron not do any version of SDM/HSM/USM etc. I do not know exactly what you are talking about so I will respond to the 2 possibilities: * They do not have a Ultrasonic-like tech. They can of course use in-lens motors but no USM thingies. * I do not know if Pentax does want / will / already license their SDM tech to Tamron. Sigma does not care since they never license anything (reason for compatibility problems). Maybe later mabe never. Pentax never licensed AFAIK their TTL/PTTL protocol, they might not license their SDM tech and even if they do, Tokina/Tamron will proba bly use simple in-lens motors.

02-01-2008, 08:48 AM	#4
barondla Site Supporter Join Date: Sep 2006 Location: midwest, United States Photos: Gallery \| Albums Posts: 5,717	If Tamron was smart they would release their 180 macro in Pentax mount. Only Sigma seems able to build long lenses. Why? thanks barondla

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