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04-21-2009, 11:01 AM   #1
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Kenko 1.5x Teleconverter for DA50-135mm?

Hi,

Has anyone tried Kenko Teleplus DG 1.5x teleconverter with DA50-135mm lens? How is the image quality? Does the AF work? Should I buy it?

I know that Tamron 1.4x is much better, but it's too difficult to find one. Now the Kenko one seems to be only option.

Thanks,
Feng

04-21-2009, 03:58 PM   #2
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Actually, it seems for a while "they" were saying Kenko actually made the Tamron, althoughit might have been the more expensive Kenko "Pro" model that was the same as the Tamron?
04-21-2009, 04:06 PM   #3
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QuoteOriginally posted by Marc Sabatella Quote
Actually, it seems for a while "they" were saying Kenko actually made the Tamron, althoughit might have been the more expensive Kenko "Pro" model that was the same as the Tamron?
Well, I couldn't find the "Pro" model for Pentax fit, it appears that they only produce the lower class "Teleplus" for Pentax.
04-21-2009, 05:46 PM   #4
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QuoteOriginally posted by FengyBoy Quote
Hi,

Has anyone tried Kenko Teleplus DG 1.5x teleconverter with DA50-135mm lens? How is the image quality? Does the AF work? Should I buy it?

I know that Tamron 1.4x is much better, but it's too difficult to find one. Now the Kenko one seems to be only option.

Thanks,
Feng
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/50145-tc-pentax-da-lenses.html


This should give you some info


Daniel

04-21-2009, 06:16 PM   #5
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with regards to the kenko 1.5x and the 50-135. I bought the kenko - it did not work (would not AF) - I returned it. I now have a tamron 1.4x that works just fine
04-21-2009, 06:21 PM   #6
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Kenko didn't work for mine

I tried the Kenko 1.5 TC, but it wouldn't do a thing when I used it with the DA*50-135. Couldn't seem to communicate with the camera at all. Althought I've heard other people say the Kenko HAS worked for them, so maybe mine was defective. I sent it back and bought the Tamron 1.4 TC, which works pretty well on the DA*50-135, and on my Tamron 70-200/2.8 as well. Even the Tamron's not 100% on the DA*, sometimes it's pretty slow to lock focus. It seems to work more reliably on the Tamron lens. Image quality on either lens is pretty good. I'm really looking forward to the new TC that Pentax is supposed to come out with, hopefully it will give even better AF performance.

By the way, some people claim that they are the exact same TC, just re-branded, but having owned both the Kenko and Tamron, they are NOT the same.
04-21-2009, 06:33 PM   #7
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QuoteOriginally posted by NeverSatisfied Quote
I tried the Kenko 1.5 TC, but it wouldn't do a thing when I used it with the DA*50-135. Couldn't seem to communicate with the camera at all. Althought I've heard other people say the Kenko HAS worked for them, so maybe mine was defective. I sent it back and bought the Tamron 1.4 TC, which works pretty well on the DA*50-135, and on my Tamron 70-200/2.8 as well. Even the Tamron's not 100% on the DA*, sometimes it's pretty slow to lock focus. It seems to work more reliably on the Tamron lens. Image quality on either lens is pretty good. I'm really looking forward to the new TC that Pentax is supposed to come out with, hopefully it will give even better AF performance.

By the way, some people claim that they are the exact same TC, just re-branded, but having owned both the Kenko and Tamron, they are NOT the same.


Hmm can you confirm which version of Kenko 1.5x you have?

1.Kenko DG Pz-AF 1.5x TELEPLUS MC

2.Kenko Pz-AF 1.5x TELEPLUS SHQ

If I am correct you have the MC (1) version



Daniel
04-21-2009, 08:19 PM   #8
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QuoteOriginally posted by danielchtong Quote
Hmm can you confirm which version of Kenko 1.5x you have?

1.Kenko DG Pz-AF 1.5x TELEPLUS MC

2.Kenko Pz-AF 1.5x TELEPLUS SHQ

If I am correct you have the MC (1) version



Daniel
Well, just to add some info, I have #2, the Kenko Pz-AF 1.5x TELEPLUS SHQ, and it will AF with my DA* 50-135mm, but it does hunt quite a bit and often fails to lock focus. It focuses better with screw drive lenses.

04-21-2009, 09:44 PM   #9
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Some Kenko TC's have the electrical contacts that can be used to drive power zoom (pz) or the SDM focus system, others do not. To use a TC on the 50-135 on a body that expects to do SDM, you'll need the versionof the TC that has the contacts. Probably should have the letters Pz in the name somewhere, as josh says, although of course not all vendors are as careful about details like that as they should be.
04-22-2009, 06:09 AM   #10
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The kenko that works with the SDM is the SHQ model, I tried it on the DA*50-135mm at the zoo and was not happy with the results. Still like it no the DA*300mm tho.
04-22-2009, 12:44 PM   #11
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QuoteOriginally posted by heliphoto Quote
Well, just to add some info, I have #2, the Kenko Pz-AF 1.5x TELEPLUS SHQ, and it will AF with my DA* 50-135mm, but it does hunt quite a bit and often fails to lock focus. It focuses better with screw drive lenses.
That reflects my tests on the 16-50 (the only SDM lens in my repertoire). Works, but hunts - so no go for me. But all in all the Kenko tc is a capable product on screw driver AF lenses.

Ben
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