I have two Suntar Auto screw-mount lenses.* When I used them on my Spotmatic F, I had trouble unscrewing them to remove them. (They worked fine on the Chinon camera they were bought for, but the Chinon is long gone.) It seems as though the little diaphragm actuator pin (on the back of the lens) does not retract into the lens quite as much as it should. Therefore, the pin hits something inside the Spotmatic, which stops the lens from unscrewing. I think it may be hitting the little metal lever at the top left of the housing (about the 11 o'clock position.) I used the lenses a few times, and the problem occured probably 80% of the time. When it happens, all I can do is fiddle with the lens auto lever, and hold the camera upside down and shake it until the pin retracts. It can take awhile and be very scary. Has anyone had a similar problem? Could I solve the problem by filing the actuator pin on the lens a little shorter. (I won't use these lenses again unless I can fix the problem, and I'm sure not going to mess with the Spotmatic mechanism.) Thank you. *One is a Suntar Auto 135mm, f:2.8. The other is a Suntar Auto Wide 35mm, f:2.8. - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org . - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
