Search results for 'back focus' - page 772
tele converter
I second the Kenko 1.5, though it does cause focus hunting on my DA* 50-135. Better on the DA* 16-50. Works a dream on my Sigma 18-200!
Posted by beakynet on 06/05/2009 - 12:52
tele converter
I second the Kenko 1.5, though it does cause focus hunting on my DA* 50-135. Better on the DA* 16-50. Works a dream on my Sigma 18-200! I have the Kenko 1.5 and was disappointed that it doesn't appear to work at all on my DA* 300 mm/K10D. You have to manual focus since the lens seems to think that...
Posted by brownargus on 06/05/2009 - 14:53
tele converter
I second the Kenko 1.5, though it does cause focus hunting on my DA* 50-135. Better on the DA* 16-50. Works a dream on my Sigma 18-200! Interesting, I'm considering a Kenko 1.5x for use on my Sigma 18-200, looking at the aperture settings it should also work on my Tamron70-300. Anybody tried th...
Posted by Hardgravity on 06/05/2009 - 16:53
tele converter
I have the Kenko 1.5 and was disappointed that it doesn't appear to work at all on my DA* 300 mm/K10D. You have to manual focus since the lens seems to think that it is still in SDM mode. Also, with the combination attached to the camera, when you press the menu button it flashes off immediately and...
Posted by Anvh on 06/05/2009 - 19:43
tele converter
The DA* 300 still has the camera driven focus spigot. so you would think that it would use that system on a none SDM Kenko 1.5x with Auto Focus, but it will only manual focus
Posted by bforbes on 06/05/2009 - 20:04
tele converter
Yes since the camera gets the info that the lens can do SDM so it won't use the camera driven focus but is trying to use the SDM to focus, if the TC doens't have the contacts the signal doesn't come trhough of course. I don't believe there is away around it, for camera driven AF the camera also w...
Posted by Anvh on 06/05/2009 - 20:58
tele converter
I have the Kenko 1.5 and was disappointed that it doesn't appear to work at all on my DA* 300 mm/K10D. You have to manual focus since the lens seems to think that it is still in SDM mode. Also, with the combination attached to the camera, when you press the menu button it flashes off immediately and...
Posted by RichardDay on 06/05/2009 - 21:35
tele converter
Yes since the camera gets the info that the lens can do SDM so it won't use the camera driven focus but is trying to use the SDM to focus, if the TC doens't have the contacts the signal doesn't come trhough of course. I don't believe there is away around it, for camera driven AF the camera also w...
Posted by bforbes on 06/05/2009 - 22:11
tele converter
[quote:3496ace15f="brownargus"]I have the Kenko 1.5 and was disappointed that it doesn't appear to work at all on my DA* 300 mm/K10D. You have to manual focus since the lens seems to think that it is still in SDM mode. Also, with the combination attached to the camera, when you press the menu button...
Posted by bforbes on 06/05/2009 - 22:17
tele converter
Yes since the camera gets the info that the lens can do SDM so it won't use the camera driven focus but is trying to use the SDM to focus, if the TC doens't have the contacts the signal doesn't come trhough of course. I don't believe there is away around it, for camera driven AF the camera also w...
Posted by Anvh on 06/05/2009 - 22:30
tele converter
Thanks for the feed back, was thinking of using a converter on the Tamron 70-200 and future pentax 300, not something I would consider using on the bigma as this lens is hard work as it is.manual focus is ok as thats all I use anyway.Only ones I see for pentax here are sigma and tamron. Thanks agai...
Posted by 08tiger on 07/05/2009 - 06:39
tele converter
If I get the Pz version, will this function correctly with the 300 DA*? John I use the Pz-AF 1.5X Teleplus SHQ with a DA*300 and it works fine with SDM. I also have a Pz-AF 1.5X Teleplus MC and it will not Auto focus at all with the DA*300. hope this helps.
Posted by bforbes on 07/05/2009 - 10:33
tele converter
If I get the Pz version, will this function correctly with the 300 DA*? John I use the Pz-AF 1.5X Teleplus SHQ with a DA*300 and it works fine with SDM. I also have a Pz-AF 1.5X Teleplus MC and it will not Auto focus at all with the DA*300. hope this helps. I have asked the importers (Intro 2020)...
Posted by RichardDay on 07/05/2009 - 10:52
tele converter
I second the Kenko 1.5, though it does cause focus hunting on my DA* 50-135. Better on the DA* 16-50. Works a dream on my Sigma 18-200! Interesting, I'm considering a Kenko 1.5x for use on my Sigma 18-200, looking at the aperture settings it should also work on my Tamron70-300. Anybody tried th...
Posted by beakynet on 07/05/2009 - 10:59
tele converter
[quote:3496ace15f="beakynet"]I second the Kenko 1.5, though it does cause focus hunting on my DA* 50-135. Better on the DA* 16-50. Works a dream on my Sigma 18-200! Interesting, I'm considering a Kenko 1.5x for use on my Sigma 18-200, looking at the aperture settings it should also work on my Tamr...
Posted by Martin Shilliday on 07/05/2009 - 12:44
tele converter
Heard back from Intro 2020 about the current DG tele-converters. Sadly no go, here's their response: Dear Richard, I have checked with our own Pentax K10D & 16-50 D* lens, unfortunately the Kenko converters don't have the extra two contacts to make them work. :cry:
Posted by RichardDay on 08/05/2009 - 18:49
tele converter
By the way, if SDM is not a major issue for you... Well that's the major problem isn't it. Pentax already said to drop the screw-drive with new lenses that has SDM. They said it cost too much to build two focus systems in a lens and that it's an engineering challaging to do so in a small lens body...
Posted by Anvh on 09/05/2009 - 09:58
Tamron SP AF compatible?
I dont think there is such thing as a auto focus mount for the Adaptall 2 lenses. There are PK/A, PK (also labelled PK/M) and screw mounts from what I can remember.
Posted by Mike-P on 07/05/2009 - 21:53
Tamron SP AF compatible?
I agree with Mike. As far as I know, all Tamron Adaptall and Adaptall 2 mounts and lenses are Manual Focus only.
Posted by grahamwalton on 08/05/2009 - 13:27
Tamron SP AF compatible?
Agree with Mile-P and grahamwalton Adaptall mounts and lenses are manual focus only.
Posted by Rees on 10/05/2009 - 18:01
