2x teleconverters

slr · 08-19-2011, 07:22 AM

does pentax make a af 2x teleconverter? the only thing i can find is the old 2x-S or 2x-L.

bymy141 · 08-19-2011, 07:30 AM

Not any more for a long time.

If you are lucky, you can still find some "old stock, new in box" 1.7x AF TC's.
A batch of them was sold a couple of months ago here on this forum.

There are other 3rd party TC's, including 2.0x TC's available in the market.
Be aware that the Sigma 2.0 TC's do not work with all lenses.
In general you will see that your camera have a lot of problems focusing with a 2.0 TC.

Bert

Adam · 08-19-2011, 11:58 AM

Unfortunately the Pentax system is still fairly lacking in this area, but there are some third-party TC's that give you screwdrive AF compatibility- check the lens review section!

**Lowell Goudge** · 08-19-2011, 03:12 PM

It might help if you tell us what lens you plan to use it with

smartguyus · 08-20-2011, 11:19 AM

I own a Pentax K-r and have two lenses so far. The DA 18-55mm that came with it and the Quantarray AF70-300mm F4-5.6 LD Macro. I am REALLY pleased with the Quantarray and have taken some great shots with it.

I just purchased a Tamron MC Teleconverter and I noticed that it seems to work OK with the exception that I cannot set the aperture. It displays 'F--', however I can still set the shutter speed, ISO, etc..

Does anyone have any workaround ideas or am I just screwed and will have to ante up for a Pentax Teleconverter at some crazy cost?

Thanks in advance-
Mark

**boriscleto** · 08-20-2011, 11:31 AM

I have a Quantaray 2x AF teleconverter I picked up for about $20 as a scratch & dent from Tech4less. The only thing "wrong" with it was that it didn't have lens caps. They had a large number of these they picked up from the Ritz bankruptcy. Unfortunately they ran out of Pentax mount Quantaray lenses and converters last year. All they have now are 2 Optios and the red K-x. You might be able to find one on evilBay for less than $100.

It will autofocus the F 70-210 @ 210, the FA 80-320 @ 300 and the DA L 55-300 @ 200.

08-19-2011, 07:22 AM	#1
slr New Member Join Date: Nov 2009 Location: florida Posts: 8	2x teleconverters does pentax make a af 2x teleconverter? the only thing i can find is the old 2x-S or 2x-L.

08-19-2011, 11:58 AM	#3
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	Unfortunately the Pentax system is still fairly lacking in this area, but there are some third-party TC's that give you screwdrive AF compatibility- check the lens review section! 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:

08-20-2011, 11:19 AM	#5
smartguyus Inactive Account Join Date: Jun 2011 Location: Sarasota, FL Photos: Albums Posts: 7	Tamron MC Teleconverter 2x for P/K I own a Pentax K-r and have two lenses so far. The DA 18-55mm that came with it and the Quantarray AF70-300mm F4-5.6 LD Macro. I am REALLY pleased with the Quantarray and have taken some great shots with it. I just purchased a Tamron MC Teleconverter and I noticed that it seems to work OK with the exception that I cannot set the aperture. It displays 'F--', however I can still set the shutter speed, ISO, etc.. Does anyone have any workaround ideas or am I just screwed and will have to ante up for a Pentax Teleconverter at some crazy cost? Thanks in advance- Mark

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08-19-2011, 07:30 AM	#2
bymy141 Veteran Member Join Date: Aug 2007 Photos: Gallery Posts: 1,563	Not any more for a long time. If you are lucky, you can still find some "old stock, new in box" 1.7x AF TC's. A batch of them was sold a couple of months ago here on this forum. There are other 3rd party TC's, including 2.0x TC's available in the market. Be aware that the Sigma 2.0 TC's do not work with all lenses. In general you will see that your camera have a lot of problems focusing with a 2.0 TC. Bert

08-19-2011, 03:12 PM	#4
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,888	It might help if you tell us what lens you plan to use it with

08-20-2011, 11:31 AM	#6
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,475	I have a Quantaray 2x AF teleconverter I picked up for about $20 as a scratch & dent from Tech4less. The only thing "wrong" with it was that it didn't have lens caps. They had a large number of these they picked up from the Ritz bankruptcy. Unfortunately they ran out of Pentax mount Quantaray lenses and converters last year. All they have now are 2 Optios and the red K-x. You might be able to find one on evilBay for less than $100. It will autofocus the F 70-210 @ 210, the FA 80-320 @ 300 and the DA L 55-300 @ 200.