[jcool]

found two lens and I assume it should work on my k20d but dont, am I missing something? one is a tokina 28mm1:2 P/K which attaches to the k20 but get a flashing F so to speak lol,,, wont fire.... the other is tokina 35-70mm 1:4 K/AR wich does not attach to camera both manual lenses....

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Last edited by jcool; 11-06-2010 at 11:02 PM.

[ovim]

P/K should mount without problems but K/AR is Konica mount I think and there isn't an adapter available to mount it on your camera or at least I haven't seen one. That 28mm 1:2 sounds interesting, can you post pictures of the lens?

[SOldBear]

one is a tokina 28mm1:2 P/K which attaches to the k20 but get a flashing F so to speak lol,,, wont fire....

Read this thread.

the other is tokina 35-70mm 1:4 K/AR wich does not attach to camera

K/AR mount is Konica Bayonet II mount (Konica AutoReflex I guess). It does not fit Pentax camera. I doubt if the value of the lens is worth looking for an adapter, if it exists.

[jcool]

Thanks, I will just throw out the Konica lens, your right on that... @OVIM, I can't post any pics on since it wont work, just get a flashing f, and when mounted , the k20 does not detect the lens being there,,,, free is free so no loss,...

[jolepp]

...
just get a flashing f, and when mounted
...

Have you enabled the "allow use of aperture ring" custom menu setting?

[jcool]

jolepp, no , I was trying to enable the focal option in the record menu, but that option stays ghosted and cannot select it , will try that ap ring though.... thanks...

[jcool]

Thanks SOldbear and jolepp, that was all I needed to do, I do not know why I could not find that info in the manual.the only thing I found was about entering the mm info, but that field was not available hmmmm... But works fine now, let me see what I can do with the lens now..... ovim i will post some pics later. thanks everyone....

[sajah]

@OVIM, I can't post any pics on since it wont work, just get a flashing f, and when mounted , the k20 does not detect the lens being there,,,, free is free so no loss,...

I believe Ovim wanted to see the picture of the lens, not the picture taken with the lens. I also interested to see the picture of the lens, because I've never heard of Tokina 28mm F2 before. I have Kiron 28mm F2 and wondering if I there's any resemblance between the two. AFAIK the Kiron 28mm F2 is similar to (some) Vivitar 28mm F2. Here's a picture of my Kiron, it has either 52 or 55mm filter thread (at the office atm and don't have the lens with me).

[jcool]

sorry for the confusion, it is a tokina 1 :2 8 like the one in the third party lens reviews, I must put my glasses on more often, the older I get the worse my eyes get....