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Old Non-Pentax lenses on K10D?

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romicsteve

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We just returned from the camera store after buying my Christmas present - a K10D. The salesman told me that Pentax advises against using any older non-Pentax k-mount lenses, due to their potential to screw up the camera lens mount. Since I have some older Tamron and Tokina K-mount zooms, I'd like to know if thre is any truth to this.
 
no truth whatsoever! The only concern is that metering is inaccurate with pre-A series lenses. The only K mount lenses to be wary of are Ricoh lenses which have their own P setting pin. This pin can jam in the the AF drive slot on a Pentax.

--
Steve

http://www.pbase.com/steephill
 
Many versions of various Vivitar lenses and other brand lenses made by the same companies that built Vivitar lenses have an issue that causes problems with some Pentax cameras: A flange which is meant to protect the diaphragm actuation lever but which is much bigger than is really necessary. If your particular lens has this feature it will prevent the lens from being mounted on many Pentax cameras, including all the digital SLR's.

Ray
 
what is the metering problem?

i just bought a pentax-m 50 lens
 
Have four old M42 lenses (Asahi and Sigma), and I'm using them on my K10D.

If you can be interested on this possibility, take a look at the kind of adapter ring (low profile) suggested:

Side detail:



Whole set:



Doesn't matter the brand of it, just the low profile so it can flush completely over body.

--
Best regards,

Juan Carlos Martins
 
Yep, it's true that some older Vivitar lenses have a "protection" flange that's bigger than it needs to be, but it's also pretty easy to fix if you're comfortable with small tools.

Use a jewlers screwdriver to remove the flange then you can use a dremel tool to cut the offending flange to size. To get a idea of what to cut, simply compare the flange to one on a lens that fits. I did this on a Vivitar Flat Field 90-180mm zoom that I simply HAD to use on my *ist DS!!

Chip
 
Chip B said:
Yep, it's true that some older Vivitar lenses have a "protection"
flange that's bigger than it needs to be, but it's also pretty easy
to fix if you're comfortable with small tools.

Use a jewlers screwdriver to remove the flange then you can use a
dremel tool to cut the offending flange to size. To get a idea of
what to cut, simply compare the flange to one on a lens that fits. I
did this on a Vivitar Flat Field 90-180mm zoom that I simply HAD to
use on my *ist DS!!
Click to expand...
Hi Chip,

I removed the flange on a Vivitar 120-600/8 and it was very easy to do with the dremel tool. I have seen a couple of posts where some folks just used a hacksaw and a file.

Cheers.

--

'Keep your eyes looking forward. However, glance back now and then to see where you've come from. It will put a smile on your face.' ~ brandrx

Ron ~ Retired.

 
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