ed_prest Posted December 21, 2003 Share Posted December 21, 2003 My 80PS shutter is getting sticky. I have taken it down and reassembled it fine (at least its cleaner) except I didn't remove the front group as I'm worried about reassembly - infinity may be effected etc??? and if course I have no manual. How does one get the shutter out? Link to comment Share on other sites More sharing options...
andre_noble4 Posted December 22, 2003 Share Posted December 22, 2003 I've read somewhere on net that shutter stickiness on these PS lenses is due to warn/aged springs in the shutter. Unless you have a set of new replacement springs from Tamron.... Do you store your PS lenses uncocked? I do now that I know. Just like a large format lens, you have to take care of the springs. Ditto with the SQA-i body. I would personally have a certified Bronica facility open it up, while new replacement parts are still available. Link to comment Share on other sites More sharing options...
raymond bradlau Posted December 22, 2003 Share Posted December 22, 2003 I also read that you should uncock the lens for storage, should I just do it every time I am done shooting? or is this s long term storage issue? Link to comment Share on other sites More sharing options...
andre_noble4 Posted December 22, 2003 Share Posted December 22, 2003 Even for short term storage, I do. It's simple, for lens you just shot with, leave it on body with camera already fired, yet don't crank the film advance. Mirror and light trap springs on the camera body will be un loaded, hence destressing both lens and camera body springs. Link to comment Share on other sites More sharing options...
frank_kimble Posted December 22, 2003 Share Posted December 22, 2003 Andre, how do we uncock a lens not on a body? Link to comment Share on other sites More sharing options...
ed_prest Posted December 22, 2003 Author Share Posted December 22, 2003 You hold in the little pin at the bottom of the mount and rotate the ring drive pins past the green dot into the red area - all the way will fire the shutter at 1/500. Now you know why the red area is so prominent. Only mount the lens when the drive pins are back in the green area. Drag the pins against the shutter springs and it will cock the lens and then lock the drive pins at the green dot - its safe to mount. Another reason Bronica is better than a 'Blad. Link to comment Share on other sites More sharing options...
andre_noble4 Posted December 22, 2003 Share Posted December 22, 2003 Yes, it's a little silver pin at the 'side' of the lens mount. You can reach it with a fingernail. Push it in, while at same time doing what Ed said with the two upright pins on the bottom of the mount until shutter fires at its' mechanical 1/500th speed. Put front and caps on, store lens 'til next time. Later, just before putting lens back on camera body, twist same two pins to the green dot 'til you feel/hear the 'click'. Lens is now ready to mount to body, and shutter is cocked. Link to comment Share on other sites More sharing options...
raymond bradlau Posted December 23, 2003 Share Posted December 23, 2003 Thanks for the info on uncocking of the Bronica lenses for storage, but what if I mount it uncocked as Im sure not to remember at least once, will this cause damage? Ray Link to comment Share on other sites More sharing options...
andre_noble4 Posted January 1, 2004 Share Posted January 1, 2004 It's not mechanically possible, have to cock it before you can mount. Link to comment Share on other sites More sharing options...
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