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03-11-2009, 11:12 AM   #1
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pentax tokina 28mm f2.8 pka r pka mount


hi...
will this mount work on my k200d??
pin removal??
will i lose the 'a' functionality..
i don't want to go down to ricoh rikenon route again.............


Last edited by dcmsox2004; 03-12-2009 at 05:20 AM. Reason: missing pics
03-11-2009, 11:20 AM   #2
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03-11-2009, 11:22 AM   #3
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03-11-2009, 12:04 PM   #4
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your images don't show up, they say "This Photo is Currently Unavailable".... maybe you have them protected on FLickR?

03-11-2009, 12:22 PM   #5
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all set now..... thanks............
i need a 'rest'.... regards
03-12-2009, 05:21 AM   #6
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03-12-2009, 05:22 AM   #7
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03-12-2009, 05:23 AM   #8
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03-12-2009, 08:32 PM   #9
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QuoteOriginally posted by dcmsox2004 Quote
I don't think so.
My wife has the K110D which isn't the same but I would expect it to be the same result.
I have a Magnicon 28mm f2.8 which is a Blacks photography brand lens which rebrands other brands like a Tokina lens. My Magnicon looks pretty much like your Tokina and may well be the same. In any case, in this image of your lens, you can't really see it from the angle but it looks like there is a curving wall that goes 2/3rds around the mount starting from that flat pin like thing that sticks out. If this is the case, then probably won't fit since mine doesn't. On other K-mount lenses, this wall like thing is only about 1.5 cm long as opposed to my 3+cm wall.
Sorry if what I'm saying isn't very clear. I can't think of how to make it more easier to understand. I'll see about posting a pic later if I have time.
Any thoughts anyone else?
03-13-2009, 11:51 PM   #10
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this will work fine in your K200D, don't think there any pin removable needed.
03-14-2009, 05:40 PM   #11
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Well, this is my Magnicon lens.



It looks awfully like the Tokina lens.
03-14-2009, 05:44 PM   #12
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Now take a look at this photo.



And look at the top of the mount.
That curved wall like part.
It's much wider than any K-mount lens I have ever seen, albeit I only have 4 other lenses as reference.
What ever the case, this lens does not fit the Pentax K110D.
If the K200D is the same as the K110D, and if my Magnicon lens is the same as the Tokina lens then you may find it does not fit.
Can anyone confirm?
03-14-2009, 06:49 PM   #13
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Both the Tokina and Magnicon lenses pictured here have a Ricoh pin. It appears to be the rounded kind that is rarely a problem. I have a couple of Vivitars and Sigmas like this that work fine.

The Magnicon has an extended light shield that showed up at about the same time on non-Pentax lenses. My Vivitar 28mm f2 lens had this. You can remove just the light shield and the lens will mount. I see one black phillips-head screw just outside of the "curved wall", and there's probably a couple of others. After it's off, you can cut the curved wall down so it looks like a Pentax light shield, smooth with sandpaper, blacken with a permanent marker and reinstall.
03-16-2009, 10:53 AM   #14
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QuoteOriginally posted by Just1MoreDave Quote
Both the Tokina and Magnicon lenses pictured here have a Ricoh pin. It appears to be the rounded kind that is rarely a problem. I have a couple of Vivitars and Sigmas like this that work fine.

The Magnicon has an extended light shield that showed up at about the same time on non-Pentax lenses. My Vivitar 28mm f2 lens had this. You can remove just the light shield and the lens will mount. I see one black phillips-head screw just outside of the "curved wall", and there's probably a couple of others. After it's off, you can cut the curved wall down so it looks like a Pentax light shield, smooth with sandpaper, blacken with a permanent marker and reinstall.
Hey thanks. Took the light guard off and tried mounting the lens and it went on easily. Taking it off was another story. I guess I'll be trying to take off the Ricoh pin after all. Thankfully there seems to be enough info about how to do this so should be easy as pie
My question (pardon me if it's a dumb question) is about the light guard. Should I file it down or can I just leave it off? Other than guarding the lever (aperture lever?) does it do anything else? Does it actually block light somehow?
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