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05-20-2011, 03:34 PM   #1
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tele converter for the sigma 50-150 2.8

I looked on the sigma site and it tells me there is no t/c for pentax with this lens? Is there an alternative?
cheers
Jan

05-20-2011, 03:58 PM   #2
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I'm not 100% sure but wouldn't this t/c work? Or at least something similar?
05-20-2011, 04:19 PM   #3
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QuoteOriginally posted by KxBlaze Quote
I'm not 100% sure but wouldn't this t/c work? Or at least something similar?
Yes, the 1.7x AF-A would work, but it would require the user to manually focus close to the correct focus and then the engage the AF of the 1.7x AF-A itself.

As far as I know, there aren't any Sigma auto-focus TCs that are compatible with the Sigma HSM motors.

Last edited by dgaies; 05-22-2011 at 06:15 AM.
05-20-2011, 04:21 PM   #4
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QuoteOriginally posted by dgaies Quote
Yes, the 1.7x AF-A would work, but it would require the user to manually focus close to the correct focus and then the engage the AF.

As far as I know, there aren't any auto-focus TCs that are compatible with the Sigma HSM motors.
Oh yeah, forgot about the HSM motor. Good point!

05-20-2011, 06:22 PM   #5
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Many thanks guys.....I now know what to keep my eye open for!
cheers
Jan

ps hmmm might be cheaper to get another lens!
05-22-2011, 06:10 AM   #6
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I own a Kenko 1,5x SHQ teleconvertor that works with Sigma HSM and Pentax SDM. Theres also a Tamron 1.4x thats supposed to work, but I don't own one,
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