Compatibility?

Wosp · 08-22-2011, 12:21 PM

PENTAX-F 1.7X SMC and Sigma EX 300/2,8 APO DG?
Any issues with this kombination ( i got a K5 and a K7)
If anyone got this combination feel free too give an old-
man some guidance

Adam · 08-22-2011, 12:31 PM

They will both work with your K5/7, just make sure that the Sigma has a Pentax mount.

Pentax-F 1.7x AF Adapter Reviews - Pentax K-mount Teleconverters and Adapters - Pentax Lens Reviews & Complete Lens Database
Sigma 300mm F2.8 APO EX DG Lens Reviews - Current Prime Lenses - Sigma, Tamron, Adaptall and 3rd Party Lens Review Database

Wosp · 08-22-2011, 12:49 PM

Originally posted by Adam

They will both work with your K5/7, just make sure that the Sigma has a Pentax mount.

Pentax-F 1.7x AF Adapter Reviews - Pentax K-mount Teleconverters and Adapters - Pentax Lens Reviews & Complete Lens Database
Sigma 300mm F2.8 APO EX DG Lens Reviews - Current Prime Lenses - Sigma, Tamron, Adaptall and 3rd Party Lens Review Database

Tnx for a quick reply =o)

**Ash** · 08-22-2011, 01:22 PM

I think you'll find that combination on your K-5 a dream to use.

swifters · 09-13-2011, 12:14 AM

Please share your experience with this bazooka!

**Lowell Goudge** · 09-13-2011, 07:52 AM

While the combination will work, and while the SMC-F 1.7x AF converter is a very good tele converter, Assuming you have correctly listed your lens as the non HSM version, you may also be interested to try the sigma APO 1.4x EX DG and APO 2x EX DG teleconverters.

these are specifically designed for long and fast sigma Tele and Tele Zoom lenses, and yeild excellent results.

I should at some time, do a head to head as I have all 3 TCs, i.e. both sigma and the pentax AF.

08-22-2011, 12:21 PM	#1
Wosp New Member Join Date: Sep 2009 Posts: 21	Compatibility? PENTAX-F 1.7X SMC and Sigma EX 300/2,8 APO DG? Any issues with this kombination ( i got a K5 and a K7) If anyone got this combination feel free too give an old- man some guidance

08-22-2011, 12:31 PM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,597	They will both work with your K5/7, just make sure that the Sigma has a Pentax mount. Pentax-F 1.7x AF Adapter Reviews - Pentax K-mount Teleconverters and Adapters - Pentax Lens Reviews & Complete Lens Database Sigma 300mm F2.8 APO EX DG Lens Reviews - Current Prime Lenses - Sigma, Tamron, Adaptall and 3rd Party Lens Review Database 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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08-22-2011, 12:49 PM	#3
Wosp New Member Join Date: Sep 2009 Posts: 21 Original Poster	Originally posted by Adam They will both work with your K5/7, just make sure that the Sigma has a Pentax mount. Pentax-F 1.7x AF Adapter Reviews - Pentax K-mount Teleconverters and Adapters - Pentax Lens Reviews & Complete Lens Database Sigma 300mm F2.8 APO EX DG Lens Reviews - Current Prime Lenses - Sigma, Tamron, Adaptall and 3rd Party Lens Review Database Tnx for a quick reply =o)

08-22-2011, 01:22 PM	#4
Ash Loyal Site Supporter Join Date: Mar 2007 Location: Toowoomba, Queensland Photos: Gallery \| Albums Posts: 23,920	I think you'll find that combination on your K-5 a dream to use.

09-13-2011, 12:14 AM	#5
swifters New Member Join Date: Sep 2011 Posts: 6	Please share your experience with this bazooka!

09-13-2011, 07:52 AM	#6
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,891	While the combination will work, and while the SMC-F 1.7x AF converter is a very good tele converter, Assuming you have correctly listed your lens as the non HSM version, you may also be interested to try the sigma APO 1.4x EX DG and APO 2x EX DG teleconverters. these are specifically designed for long and fast sigma Tele and Tele Zoom lenses, and yeild excellent results. I should at some time, do a head to head as I have all 3 TCs, i.e. both sigma and the pentax AF.