stuck m42 adapter
Both the *istDS and the K5 are incurably addicted to old glass
My page on Photocrowd - link
Cheers., I should have read the instructions first and attached the adapter to my camera.I have attempted to attach the lens to one of my cameras, but strangely it won't attach.I have attempted the towel method , but may leave it till tomorrow , after some Weetabix , for energy.
That is strange. Perhaps the adapter has distorted ? Or the spring strip has been bent out of position. I would suggest removing it with a mole grip or the like and throwing it away.
Peter
My Flickr page
Some of them can be snug as well so takes a bit of effort to turn after depressing that spring.
But the adapter seems too large , for the camera mount.
This is supposed to be an authentic adapter , anyone have any suggestions ?

I think the manual states that the adapter should go on the lens first, then onto the camera but I always put it on the camera and screw the lens in and have never had a problem with it. The only problem I ever had with an M42 adapter was a third party one that got stuck while trying it out in a used camera shop. Luckily they also do repairs and quickly removed it for me, but the experience put me off M43 lenses on my DSLR for years.
Pentax hybrid user - Digital K3 & K200D, film 645 and 35mm SLR and Pentax (&other) lenses adapted to Fuji X digital
Fan of DA limited and old manual lenses
Years ago I had a 28mm SMC Takumar which had a tiny pin, of obscure purpose, that projected from the face of the flange close to the M42 screw. It gave no trouble in a genuine Pentax M42-PK adapter, nor on the very good quality one marketed by Jessop, but it fouled the slots on a Kood adapter. Once the Kood was screwed on, it could only be removed if one could depress the little pin - which of course was impossible if the assembly had been clicked into place on a PK camera!
If some tiny projection from the seating flange of the lens is fouling in the slots of the adapter, then I would think that it cannot be a genuine Pentax product.
I wrote a review of some adapters back on 7 August 2012 under "M42-PK adapters".
Martin
A few of my photographs in flickr.
Lizars 1910 "Challenge" quarter-plate camera; and some more recent stuff.
I have looked at a photo of an original adapter on WEX website and mine looks identical. With the adapter attached the pin on my lens is visible.
Now that the adapter is removed I attempted to install the adapter on my K7, but it did not want to attach. After the dilemma with the lens , I am reluctant to attach the adapter to , one of my modern Pentax bodies.
I will search for your review
Also, if you want to remove an M42 adapter from a lens then simply put a PK cap over it and twist. You'll get so much more leverage this way.
All the gear with no idea
theonenadeem
Member
I have a genuine m42 to K mount adapter, which I attached to a M42 55mm f2 lens.
I have not attached the lens with adapter to the camera yet, but when I when I attempted to remove the adapter, it would only move marginally, but I cannot unscrew the adapter from the lens .
As usual , I am turning to forum members in search of a solution.
Thank you in advance.
Regards