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Kenko 1.5 Teleplus DG problem

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Maybe it is possible, but, perhaps, there is another contact that tell to K10 the lens is a SDM lens.
On the 50-135 there are six edge contacts
On the TC tgera are six edge contacts (like the zoom)
On the 16-45 (the works with screw) there are only five edge contacts

I tried to insulate the sixth contact on TC but it doesn't work!!!

Marco

I'm Italian so sorry for my English
 
Ma se voglio sfruttare l'AF del corpo tramite la vite (che c'è anche sui DA star) invece che quello dello zoom, come è possibile fare?

--
Marco

I'm Italian so sorry for my English
 
Marcos58 said:
Maybe it is possible, but, perhaps, there is another contact that
tell to K10 the lens is a SDM lens.
On the 50-135 there are six edge contacts
On the TC tgera are six edge contacts (like the zoom)
On the 16-45 (the works with screw) there are only five edge contacts

I tried to insulate the sixth contact on TC but it doesn't work!!!
Click to expand...
Marco

The 6 contacts are direct (straight through) connections, as are the power contacts mentioned below, so the TC is really "invisible" as far as the lens and the camera are concerned, but you may have a problem with them not making exact contact with the lens or body contacts.

In addition you must have the 2 extra gold contacts for SDM power. I show these contacts in the 3 photos below (Tamron TC shown, the Kenko should be virtually the same):

Camera contacts.



Rear TC contacts.



Front TC contacts.



I hope this helps to clear up any issues.
--
Richard Day - 'Carpe Diem!'
Gloucester UK
 
Marcos58 said:
Ma se voglio sfruttare l'AF del corpo tramite la vite (che c'è anche
sui DA star) invece che quello dello zoom, come è possibile fare?

--
Marco

I'm Italian so sorry for my English
Click to expand...
onestamente non lo so, speravo funzionasse la vite, ma con la k20
non va, invece con una Pentax SFXn funziona :(
 
I remember now, if you upgrade to 1.3 you can use SDM, but the SDM lenses no longer are able to use the screw drive. Pentax really needs to provide a firmware update to provide a menu switch to allow the SDM lens to use the screw driven AF if needed.

Thank you
Russell
 
Russell Evans said:
I remember now, if you upgrade to 1.3 you can use SDM, but the SDM
lenses no longer are able to use the screw drive. Pentax really needs
to provide a firmware update to provide a menu switch to allow the
SDM lens to use the screw driven AF if needed.
Click to expand...
Definitely. An overide, both auto and manual, is required.
--
Richard Day - 'Carpe Diem!'
Gloucester UK
 
Marcos58 said:
richardday said:
I hope this helps to clear up any issues.
--
Richard Day - 'Carpe Diem!'
Gloucester UK
Click to expand...
Yes, thank you.
My TC has only the outer Sdm power contacts but not the inner
(forward the lens)
Click to expand...
Then I would query the supplier as it seems that it's not quite correct. It should had the power contacts on both sides of the TC for the SDM motor to have a power feed, having just one side seems really wierd.
--
Richard Day - 'Carpe Diem!'
Gloucester UK
 
I think he's saying its got the PKA contact not the Pz contacts.

This means its not the teleplus PZ converter and my statement at the start was true!!!
 
awaldram said:
I think he's saying its got the PKA contact not the Pz contacts.

This means its not the teleplus PZ converter and my statement at the
start was true!!!
Click to expand...
This is getting more and more confusing as it goes on!

Are you saying that Kenko make two 1.5x DG converters?

I was certain there was only the one, which is what Paul (aka channeler) has (see my other post), and the only one that's currently available, at least here in the UK.

I'm going to have to do some more research into this.
--
Richard Day - 'Carpe Diem!'
Gloucester UK
 
I have the same Kenko TC as Marco58 and my DA*300 does the same thing that his camera is doing.

Flashing MF in the viewfinder and the camera function screen is disabled.

There seems to be SDM contacts but they don't seem to have the little spring mounted ball-bearing contacts.

Tried using a multimeter to see if current is going thru - but no power seems to be passing thru the contacts. But its difficult to hold the probes on the contact single-handed,

So maybe the P/AF 1.5 TELEPLUS MC is not compatible with SDM and the Pz is?
 
Maybe if Marco or Cannuck could post an image of the converter they have then all would become clear .??
 
Are you sure you don't have the outer contact?

I have the same "P/AF 1.5x TELEPLUS MC KENKO DG" & have both the inside & outside contact like pics shown. Although I have no SDM lens to test it.

--
Marcos58 said:
My TC has only the outer Sdm power contacts but not the inner
(forward the lens)
--
Marco
Click to expand...
--



Steven
K100d, Tamron 17-50, FA77 silver, Kenko 1.5xTC, Metz 48, Domke F-5Xb,
DA21 (Sold), Tamron 28-75 (Sold), Nikon SB-20
http://www.flickr.com/photos/slam1222/sets/72157602293919893/detail/
 
I have the Kenko 1.5x and the 50-135 and 200 SDM lenses. The TC does have the two contacts, and SDM works in the sense that the camera can and does drive the SDM focusing. However, it does NOT work for any practical purposes. The reason is that for some reason the camera is confused when the TC is mounted, and generally overshoots when focusing by quite a bit. It then realises that the subject is out of focus, focuses the other way, and overshoots in that direction. And so on. This extreme form of focus hunting can go on for practically ever (so focus would lock after several seconds only, with luck).

The converter works fine on the 55-300 (which even focuses at the 300mm even though speed is only f8.3), and with the DA* on the K10D which uses screw drive with the old firmware.

I have resigned myself to needing the Pentax SDM converter to use SDM.
 
Sorry for the delay

The picture aren't very good (I'm very tired after a working day) but I hope these pictures explain clearly

This is the lens side ...



... this is the body side ...



... and this is the type of my TC (you can't see but it is a DG type also)



--
Marco

I'm Italian so sorry for my English
 
Here is a picture of my KENKO TC bought on June 2nd 2008. Getting a close up picture reveals what is actually there.



It looks like there are contacts in place on my TC, but using a multimeter I can't pass a current thru them. So I think they are not functional. Looking at richardday photo of his TC it seems that his camera side contacts are slightly raise and maybe the ones on mine are recessed?

I talked to a KENKO tech about this and he asked me to send it in. I asked him about the difference between a P/AF and a Pz/AF and using SDM lenses. He said that if the TC has the gold "DG" lettering (lower RH photo) then it should be SDM compatible.

So I'll send it off and see if they can fix it.
 
Marcos58 said:
Sorry for the delay

The picture aren't very good (I'm very tired after a working day) but
I hope these pictures explain clearly

This is the lens side ...



... this is the body side ...



... and this is the type of my TC (you can't see but it is a DG type
also)



--
Marco

I'm Italian so sorry for my English
Click to expand...
So Marcos, what's the latest situation with your Kenko converter? Mine just came today from B&H Photo and they had sent me the exact one like yours. I called them up and tried to explain to them that they had sent me a wrong converter, 2 sales men and a Cust. Service guy are all seemed very clueless and very rude too. Actually, the first sales person wasn't rude. They agreed to give me an RMA for a return or an exchange. I'm not sure what I should do now because it seems like this is a very confusing matter, and noone seems to know for sure what's the right answer!

--
Wil
Damn the Pentax Manual
 
thanks (?) for this post guys, I will hopefully be getting an AF TC soon, and given that the tamron 1.4x seems to be discontinued was looking at the kenko one.

If I've got this straight there is a P/AF version and a Pz/AF version of the 1.5xTC

Whilst the P/AF version looks like it should have the contacts for SDM it seems that some has a manufacturing defect and the contacts on one side are covered by plastic, hence the scuffing visible on marcos pics ? ouch !

If this is correct then to get marcos lens to work with the TC he could perhaps do a firmware downgrade to 1.2 to re-enable screwdrive ? (NB no personal experience here) Depends how much the TC is used though as to whether it's worth the hassle, and how many other SDM lenses he has of course.

--
Pentax SLR talk FAQ (courtesy Cideway et al)
http://forums.dpreview.com/forums/read.asp?forum=1036&message=23161072

When the search feature isn't working here, go to Google, and type the following:
site:forums.dpreview.com your search string
OR for pentax SLR site:dpreview.com forum=1036 your search string
 
bladerunneruk said:
If I've got this straight there is a P/AF version and a Pz/AF version
of the 1.5xTC
Click to expand...
I ordered one of these TCs a couple of weeks ago. The version shown on the website was Pz but the one that came was P/AF. The moulding had space for the SDM contacts but there were none present.

I tried the TC with all my lenses and AF worked for everything but the DA*200. That came up in the VF as MF. As my main reason for buying the TC was to push out the 200 to 300 it was no use to me so I sent it back.

I explained the problem and asked the supplier if he could get a Pz version. The answer was that Kenko say the Pz version is not available. This is in UK but if Kenko is making Pzs I would exect them to be available anywhere.

However, now that Kenko and Pentax are part of the same group it may be that they are preparing a Pentax-badged version and the P/AFs still around are just old stock.

--
Gerry


First camera 1953, first Pentax 1983, first DSLR 2006
http://www.pbase.com/gerrywinterbourne
 
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