1.7 Teleconverter compatibility

Tigs · 03-19-2017, 12:21 PM

I'm considering purchasing a SMC Pentax-F 1.7x AF Adapter. Will this work well on non-Pentax lenses, say a Samyang 135mm?

Thanks

**sergysergy** · 03-19-2017, 12:27 PM

The 1.7 is mainly used with fast lenses and 50mm lenses (the brand should not matter) if I am not mistaken.

Adam · 03-19-2017, 01:30 PM

It should work just fine, just bear in mind that the AF adjustment range is smaller on telephoto lenses so you may need to use the focusing ring on the lens from time to time.

03-19-2017, 12:21 PM	#1
Tigs Senior Member Join Date: Feb 2017 Posts: 146	1.7 Teleconverter compatibility I'm considering purchasing a SMC Pentax-F 1.7x AF Adapter. Will this work well on non-Pentax lenses, say a Samyang 135mm? Thanks

03-19-2017, 01:30 PM	#3
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,608	It should work just fine, just bear in mind that the AF adjustment range is smaller on telephoto lenses so you may need to use the focusing ring on the lens from time to time. 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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03-19-2017, 12:27 PM	#2
sergysergy Site Supporter Join Date: Jan 2011 Photos: Gallery Posts: 5,175	The 1.7 is mainly used with fast lenses and 50mm lenses (the brand should not matter) if I am not mistaken.