|Posted: Fri Jul 27, 2018 3:57 am Post subject: Re: Pentacon Pentovar variable focal length lens repair
|mr blackstock wrote:
I am hoping one of you have a little experience with a Pentovar 15-60mm F2.8/30-120mm F5.6 ZOOM lens. The mount is for a Pentaflex AK16mm cine camera.
The shutter/aperture blades are essentially jammed, not stiff or gunked up, just plain old jammed. If I attempt to force it, I can see the blades buckling under the pressure. So, lacking any online resource about the Pentovar, or affordable local specialist, I decided to attempt the repair myself.
While I have a wee bit of experience tinkering with cameras, and one Canon Super8 1218 lens, I have hit an obstacle with the Pentovar lens. Having removed the lenses I can, the one sitting atop the aperture blades I cannot see how to remove. I was hoping people could have a look and perhaps suggest a way of tackling the issue.
There is a small screw deep in the body of the lens, when I undo it, the small lens does not move, the screw has a pole on it's end, presumably to stop something turning. There are no other screws for me to try.
I have attached some pics of the lens but they are not showing up in the post. Odd
Welcome mr blackstock
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Cameras: Canon 5Dc, Spotmatics II, F, ESII
M42 Asahi Optical Co., Lenses: S-M-C Takumars 1:4.5/20 & 1:2/35, SMC Takumar 1:1.4/50, S-M-C Takumars 1:1.8/85, 1:135/2.5 (II), 1:4/200, 1:4.5/500, & S-M-C Macro-Takumar 1:4/100