How/Who to repair Sinar P rear focus knob ?

[Ken Lee]

On the rear standard, the focusing knob has become inoperable. This is the knob which also holds a depth-of-field scale. When I rotate the knob, the knob spins, but the rear standard doesn't move.

To whom should I send the rear standard for sound and speedy repair ? Is there an easy fix that I can do myself ?

Many thanks !

[Dan V]

Have you considered Richard Ritter? http://www.lg4mat.net/

[Bob Gentile]

Might be a silly question, but... have you tried tightening the set-screw?

[Jerry Flynn]

Check with Sinar Bron. There are authorized Sinar repair stations around the country. I have gone to Northwest Cammera Repair in White Bear MN (a suburb of St. Paul) to have work done. I am sure there must be someone out your way.

[Ken Lee]

"...have you tried tightening the set-screw ?"

I will buy a metric hex-wrench and give it a try.

There is also a sliver-colored cap, on the right side of the knob (just visible in the photo above). If you take it off, a screw is found. In my case, the screw does not tighten when turned. Perhaps the threads are worn out, and I need a new part.

[Greg Lockrey]

"...have you tried tightening the set-screw ?"

I will buy a metric hex-wrench and give it a try.

There is also a sliver-colored cap, on the right side of the knob (just visible in the photo above). If you take it off, a screw is found. In my case, the screw does not tighten when turned. Perhaps the threads are worn out, and I need a new part.

That screw merely holds the knob onto the shaft. You do need to make sure that the set screw is firmly set. The first time mine came loose, it scared me too.

[Ken Lee]

Clarification: Is the set-screw the very small hexagonal item which sits in the middle of the knob - or is the set-screw the one which is covered by the silver cap ?

[Ron Marshall]

The set-screw is the small hex-head screw perpendicular to the axis of rotation of the knob.

[Ken Lee]

Thanks !!

I will take this piece to the hardware store and get a metric hex wrench that will fit it.

[Uusilehto]

That's what I like about Sinar. Everything is metric (cable release, screws, etc.). No imperial entanglements.