Quote Originally Posted by Mike Kennedy
Can it be done? I have an Auto Sears 135mm f2.8 lens with a mount stamped U. It will fit a Pentax K1000 but will not stay in place when adjusted.I would like to replace the present mount with an HM42 from one of my cruddy lenses.
Any suggestions?
Hi, Mike,
There used to be an adaptor made by Pentax and several accessory manufacturers that fitted in to the K mount ,and was spring loaded so it stayed in and it adapted to fit M42 screw lenses , it was just a little silver ring you should be able to get hold of one still. If you do locate one make sure it comes with the little tommy bar to remove it otherwise you will have problems. As far as I remember the adaptor may effect a lenses ability to focus on infinity but at least it will be usable to some degree