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firstshot · 01-14-2011, 09:04 AM

Hello, My question is can you attach a k adapter for 645 lens to k20d and then attach A 645 2x rear converter then 645 lens. What happens to f/stops and A/F, M/F. Thank you, Jerry

Adam · 01-14-2011, 09:16 AM

Moved to the lens forum.

The answer to your question is yes: you can definitely do that. You lose 2 stops of light, are restricted to manual focus, and have a very poorly-balanced lens that will pretty much need to have its own tripod mount.

firstshot · 01-14-2011, 09:22 AM

Thank you Adam.

01-14-2011, 09:04 AM	#1
firstshot Forum Member Join Date: Jan 2011 Location: Meridian, Idaho Posts: 69	645 rear converter Hello, My question is can you attach a k adapter for 645 lens to k20d and then attach A 645 2x rear converter then 645 lens. What happens to f/stops and A/F, M/F. Thank you, Jerry

01-14-2011, 09:16 AM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	Moved to the lens forum. The answer to your question is yes: you can definitely do that. You lose 2 stops of light, are restricted to manual focus, and have a very poorly-balanced lens that will pretty much need to have its own tripod mount. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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01-14-2011, 09:22 AM	#3
firstshot Forum Member Join Date: Jan 2011 Location: Meridian, Idaho Posts: 69 Original Poster	Thank you Adam.

645 rear converter

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