Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
02-15-2010, 08:09 PM   #1
Senior Member




Join Date: Feb 2010
Photos: Gallery
Posts: 175
Any 1.4x TC with AF for HSM or SDM

Anyone been able to confirm whether any 1.4x or 1.5x exists that will AF with Pentax DA* SDM lenses or Sigma HSM lenes. Have a K7; interested in the sigma 70-200 f/2.8 EX DG HSM and would like a TC that preserves AF functionality.

02-15-2010, 09:29 PM   #2
Site Supporter
davidreilly3207's Avatar

Join Date: Sep 2009
Location: South Jersey
Photos: Gallery | Albums
Posts: 587
My DA*50-135mm Pentax works well with my Tamron 1.4x AF-PZ MC4 on my K20d body. The PZ stands for power zoom and those are the contacts used for SDM.
02-15-2010, 11:04 PM   #3
Loyal Site Supporter
imtheguy's Avatar

Join Date: Mar 2009
Location: Virginia Beach
Photos: Gallery | Albums
Posts: 2,950
QuoteOriginally posted by tram57 Quote
Anyone been able to confirm whether any 1.4x or 1.5x exists that will AF with Pentax DA* SDM lenses or Sigma HSM lenes. Have a K7; interested in the sigma 70-200 f/2.8 EX DG HSM and would like a TC that preserves AF functionality.
Welcome to the Forum.

There are a lot of threads recently on your question. You might get a lot more info if you use the Forum search tool and find a few.
02-16-2010, 06:39 AM   #4
Senior Member




Join Date: Feb 2010
Photos: Gallery
Posts: 175
Original Poster
spent quite a bit of time searching, and reading about the TC's - does a particular thread come to mind that clearly addresses this question? Tx.

02-16-2010, 07:48 AM   #5
Veteran Member




Join Date: Sep 2007
Location: La Crescenta, CA
Posts: 7,452
afaik the only TC that will work with Sigma HSM lenses is the Kenko 1.5x SHQ, which is quite rare.
02-16-2010, 08:23 AM   #6
Veteran Member
pop4's Avatar

Join Date: Aug 2007
Location: YMML
Photos: Gallery
Posts: 1,877
I have a Kenko Pz-AF 1.5x Teleplus SHQ TC that works fine with my Sigma 70-200mm f/2.8 HSM II lens. And since it works with Sigma HSM, I see no reason why it shouldn't work with SDM.
02-16-2010, 03:12 PM   #7
Senior Member




Join Date: Feb 2010
Photos: Gallery
Posts: 175
Original Poster
Interesting. The user reviews on the B&H site state that the Kenko1.5x DF AF TC does not autofocus with the pentax DA* SDM lenes. Is the Kenko TC you are referring to as working with the Sigma lens a different model, or the same?
02-16-2010, 04:23 PM   #8
Veteran Member




Join Date: Sep 2007
Location: La Crescenta, CA
Posts: 7,452
The one you're looking for is the one pictured here: Kenko 1.5X Pz-AF Teleplus SHQ teleconverter for Pentax - eBay. (end time 30-Jan-10 00:04:14 AEDST)

Which as far as I can tell is not the same one on the B&H site.

02-16-2010, 06:39 PM   #9
Veteran Member
pop4's Avatar

Join Date: Aug 2007
Location: YMML
Photos: Gallery
Posts: 1,877
QuoteOriginally posted by tram57 Quote
Interesting. The user reviews on the B&H site state that the Kenko1.5x DF AF TC does not autofocus with the pentax DA* SDM lenes. Is the Kenko TC you are referring to as working with the Sigma lens a different model, or the same?
They are two different teleconverters.

The one on BH is a Kenko 1.5x DF AF Teleconverter, which I believe doesn't support HSM/SDM. The markings on this TC are: 1.5X TELEPLUS MC

The one I have is a Kenko 1.5x Pz-AF SHQ Teleconverter, which I KNOW for sure supports HSM. The markings on this TC are Pz-AF 1.5X TELEPLUS SHQ

Hope that clears things up.
02-16-2010, 06:45 PM   #10
Senior Member




Join Date: Feb 2010
Photos: Gallery
Posts: 175
Original Poster
Thanks! Very informative.
02-16-2010, 06:52 PM - 1 Like   #11
Pentaxian
danielchtong's Avatar

Join Date: Jul 2007
Location: Toronto
Posts: 848
QuoteOriginally posted by tram57 Quote
Thanks! Very informative.
I have compiled from this and other forums what experienced users know. Updated late 2009. Pl note that there is still no current TC that works with any SDM lenses . Two TCs are known to work with SDM and they are not current model. That means you have to buy them used or from ebay


+++++++++++++++++++++++++++++++++++++++++++++++

Tamron 1.4x Pz-AF MC4 AF works. SDM no re Brad (photo.net)

Tamron-F Pz-AF MC4 1.4x both SDM & AF works for DA*300mm re Dave (photo.net)


Tamron-F Pz-AF MC4 1.4x both SDM 7 AF works for DA*60-250mm as per dick eduard of dpreview

Tamron-F Pz-AF MC4 1.4x *I had with the lens is its compatibility with the Tamron SP 1.4x TC Sigma* 70-200mmHSM F2.8

HSM works fine at 70mm, but absolutely will not lock focus at or anywhere around 200mm, and I tested it in*full sun*- very high contrast conditions. Hunts back and forth,****
Ash of Pentaxforums said 090904


Tamron-F Pz-AF MC4 1.4x both SDM & AF works for DA*300mm as per Toshi, moderator of Pentaxforums.com.

Tamron-F Pz-AF MC4 1.4x both SDM & AF works only 10% of the time for DA* 50-135mm but hunts a lot re Miserere

Tamron-F Pz-AF MC4 1.4x with the Sigma 70-200mm -new with HSM . The HSM AF works. It really didn't work all that well indoors at night according to Dave Hollander of Photo.net

Kenko DG Pz-AF 1.5x TELEPLUS MC no AF no SDM on DA*300mm re Dave (photo.net)

Kenko DG Pz-AF 1.5x TELEPLUS MC AF works on older AF lens re Dave (photo.net)

Kenko Pz-AF 1.5X TELEPLUS MC only AF works; SDM no as per jgredline of Pentaxforums.com

Kenko Pz-AF 1.5x TELEPLUS SHQ both AF & SDM works for DA*200mm and all older AF lens re Daniel

Kenko Pz-AF 1.5x TELEPLUS SHQ both AF & SDM works for DA*300mm re Borno (Tom) of Pentaxforums.com .SDM hunts a bit with DA*300mm

Kenko Pz-AF 1.5x TELEPLUS SHQ both AF & SDM works for DA*50-135mm but it does hunt quite a bit and often fails to lock focus according to heliphoto of Pentaxforums ; Buddha Jones of Pentaxforums not happy with its result ;

**************************************************

Daniel, Toronto
02-16-2010, 06:53 PM   #12
Pentaxian
danielchtong's Avatar

Join Date: Jul 2007
Location: Toronto
Posts: 848
QuoteOriginally posted by pop4 Quote
They are two different teleconverters.

The one on BH is a Kenko 1.5x DF AF Teleconverter, which I believe doesn't support HSM/SDM. The markings on this TC are: 1.5X TELEPLUS MC

The one I have is a Kenko 1.5x Pz-AF SHQ Teleconverter, which I KNOW for sure supports HSM. The markings on this TC are Pz-AF 1.5X TELEPLUS SHQ

Hope that clears things up.
Statement confirmed


Daniel
02-16-2010, 07:09 PM   #13
Site Supporter
NeverSatisfied's Avatar

Join Date: Dec 2007
Location: S.E. Michigan
Posts: 666
QuoteOriginally posted by danielchtong Quote
I have compiled from this and other forums what experienced users know. Updated late 2009. Pl note that there is still no current TC that works with any SDM lenses . Two TCs are known to work with SDM and they are not current model. That means you have to buy them used or from ebay


+++++++++++++++++++++++++++++++++++++++++++++++

Tamron 1.4x Pz-AF MC4 AF works. SDM no re Brad (photo.net)

Tamron-F Pz-AF MC4 1.4x both SDM & AF works for DA*300mm re Dave (photo.net)


Tamron-F Pz-AF MC4 1.4x both SDM 7 AF works for DA*60-250mm as per dick eduard of dpreview

Tamron-F Pz-AF MC4 1.4x *I had with the lens is its compatibility with the Tamron SP 1.4x TC Sigma* 70-200mmHSM F2.8

HSM works fine at 70mm, but absolutely will not lock focus at or anywhere around 200mm, and I tested it in*full sun*- very high contrast conditions. Hunts back and forth,****
Ash of Pentaxforums said 090904


Tamron-F Pz-AF MC4 1.4x both SDM & AF works for DA*300mm as per Toshi, moderator of Pentaxforums.com.

Tamron-F Pz-AF MC4 1.4x both SDM & AF works only 10% of the time for DA* 50-135mm but hunts a lot re Miserere

Tamron-F Pz-AF MC4 1.4x with the Sigma 70-200mm -new with HSM . The HSM AF works. It really didn't work all that well indoors at night according to Dave Hollander of Photo.net

Kenko DG Pz-AF 1.5x TELEPLUS MC no AF no SDM on DA*300mm re Dave (photo.net)

Kenko DG Pz-AF 1.5x TELEPLUS MC AF works on older AF lens re Dave (photo.net)

Kenko Pz-AF 1.5X TELEPLUS MC only AF works; SDM no as per jgredline of Pentaxforums.com

Kenko Pz-AF 1.5x TELEPLUS SHQ both AF & SDM works for DA*200mm and all older AF lens re Daniel

Kenko Pz-AF 1.5x TELEPLUS SHQ both AF & SDM works for DA*300mm re Borno (Tom) of Pentaxforums.com ….SDM hunts a bit with DA*300mm

Kenko Pz-AF 1.5x TELEPLUS SHQ both AF & SDM works for DA*50-135mm but it does hunt quite a bit and often fails to lock focus according to heliphoto of Pentaxforums ; Buddha Jones of Pentaxforums not happy with its result ;

**************************************************

Daniel, Toronto
To add to this tally:
I tried a Kenko 1.5 from B&H a while back, don't remember which version now (sorry), but it didn't work AT ALL for any of my SDM lenses.

I have the Tamron 1.4 which works VERY poorly on the DA*50-135, hardly ever locks focus unless it's bright light and contrasty, hunts a lot. HOWEVER, this same TC works much better on my DA*300, go figure! (And it works quite well on my Tamron 70-200/2.8 but of course that is not an SDM or HSM lens.)

Last edited by NeverSatisfied; 02-16-2010 at 07:40 PM.
02-16-2010, 07:29 PM   #14
Veteran Member
pop4's Avatar

Join Date: Aug 2007
Location: YMML
Photos: Gallery
Posts: 1,877
Kenko Pz-AF 1.5x TELEPLUS SHQ both AF & SDM works for Sigma 70-200mm F2.8 HSM II re pop4 of PentaxForums.com
02-17-2010, 07:35 AM   #15
Pentaxian
danielchtong's Avatar

Join Date: Jul 2007
Location: Toronto
Posts: 848
QuoteOriginally posted by NeverSatisfied Quote
To add to this tally:
I tried a Kenko 1.5 from B&H a while back, don't remember which version now (sorry), but it didn't work AT ALL for any of my SDM lenses.
I mentioned that SDM compatible ones are no longer in production. If you can order from B&H new, it is not going to work.


QuoteQuote:

I have the Tamron 1.4 which works VERY poorly on the DA*50-135, hardly ever locks focus unless it's bright light and contrasty, hunts a lot. HOWEVER, this same TC works much better on my DA*300, go figure! (And it works quite well on my Tamron 70-200/2.8 but of course that is not an SDM or HSM lens.)
Sounds reasonable .
TC works best with fast & prime lens. It sucks usually with slow lens or zoom as the latter has more optical elements resulting in more interior refraction and distortion of course.
Also all these TC are not custom-made for your lens. So mileage does vary.



Daniel
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
1.4x, 1.4x tc, af, hsm, k-mount, pentax lens, sdm, sigma, slr lens, tc, tc with af
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Pentax SDM vs Sigma HSM. Which is better? Peter Zack Pentax SLR Lens Discussion 31 07-27-2009 11:00 AM
Lens Converter for HSM or SDM Denis Pentax SLR Lens Discussion 19 09-30-2008 07:36 AM
K100D and SDM/HSM lenses nathanjberry Pentax SLR Lens Discussion 7 03-04-2008 04:11 PM
HSM, SDM lenses on K10D montezuma Pentax DSLR Discussion 9 02-06-2008 02:25 PM
HSM/SDM lenses for Pentax? azcavalier Pentax SLR Lens Discussion 3 11-04-2007 08:50 PM



All times are GMT -7. The time now is 06:05 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top