I found an SMC Takumar 50/1.4 to play with. Here's what I found: 1.) Taking the lens apart from the front doesn't let you get to the pin. 2.) I can see how the pin could catch in the adapter ring but only if the lens is about almost 1/2 turn unscrewed OR the pin caught when the lens was being installed and is now bent and jammed between the adapter and the lens itself. 3.) The pin is small but very hard steel and will be hard to break off, especially if bent in that direction. 4.) I put the lock spring back on a Pentax M42/K adapter, installed it and tried to force it back off. I'll *never* try that again, I could see the entire lens mount flexing on the ist-D! (I take all the lock springs off before use.)
You have three choices I can see: 1.) Try using moderate (no grunting) force and hope the pin lets go. 2.) Drill a tiny hole in the lens itself so a needle can be inserted to release the lock spring. I can show you where the hole needs to be. 3.) Let Pentax do #2 for you. In my opinion they should do it for free for not warning against this possible problem, assuming the adapter is a genuine Pentax one. Thanks for the education in what to watch out for, I'm sorry it had to be at your expense. Don > -----Original Message----- > From: dave g [mailto:[EMAIL PROTECTED] > Sent: Wednesday, October 12, 2005 6:24 PM > To: [EMAIL PROTECTED] > Subject: pentax lens stuck on camera/adapter > > > William Robb suggested I contact you regarding my lens problem/camera > problem. > > Here's the story: > > Takumar 1.4 SMC lens > Pentax K mount adapter > Pentax Ist DS camera. > > I can't get the lens off the adapter, which is on the camera (and you > can't take off the adapter without squeezing the springy thing with a > fingernail to release it - which is not possible with the lens on it). > I've had this lens on and off before but something is catching now. > Also, the auto/manual switch is stuck on auto, which must be somehow > related...? > > It's stuck, not mis-threaded and I'm a bit at a loss. Do you know how to > get this lens off (at this point if it involves destroying the lens or > adapter it's ok!). Is it possible to dismantle the lens carefully to > get at the necessary components? We tried getting a feeler gauge in > between to push that pin that releases the auto/manual lens pin, while > simultaneously pushing the auto/manual switch towards "auto". Not > happening. My camera expert here seemed to think that dismantling the > lens would get us to the necessary access but he wasn't sure. A little > while ago, someone suggested just forcing the lens to turn. Correct me > if I'm wrong, but the first thing to break would be that pin > (wonderful), the second thing to break would be the adapter (even > better) and he couldn't think of anything that might break in the camera > (Digital Ist DS - would be very expensive if something did break). What > do you think? > Thanks for any assistance, if you prefer I call you (I'm in the UK) > please give me your number and I'll make sure to call at a reasonable > hour. thanks again, > > Dave > -- > dave g > [EMAIL PROTECTED] > > -- > http://www.fastmail.fm - Access all of your messages and folders > wherever you are >
