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Author Message   Krp Tinkerer Username: Krp Post Number: 60 Registered: 07-2006 Rating: N/A Votes: 0 Posted on Monday, February 04, 2008 - 01:58 pm:    I do not. Yes, the shutter will cycle w/o the main spring. The front and rear optics are 1/2 the battle sometimes. 4 screws to remove the depth of field scale, 3 short flat heads to remove the aperture ring and detent ring. 3 screws around the barrel and 2 for the pc socket if present.(not on early lenses) Then the retaining ring on the back side of the shutter. Set to Mirror up on the pivot button. Watch for loose spacer rings once the shutter is out. The rest is fairly simple. The aperture stop down arm has a spring that will be loose and the center screw on the plate for the arm. The plastic arm for flash setting M/X is also a loose piece. That should get you to the final 3 screws to remove the cover plate on the front of the shutter. I can provide you with a good photo of the shutter in working order