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02-01-2008, 01:25 AM   #1
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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

02-01-2008, 01:58 AM   #2
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Do Tokina or Tamron not do any version of SDM/HSM/USM etc.
02-01-2008, 03:45 AM   #3
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QuoteOriginally posted by Arpe Quote
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
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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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