With the Start, Pierre sent me his HORIZONT panoramic camera for review. Main problem: the drive is hard and the film tears.
He found a very complete page devoted to the revision of these devices: KMZ Horizont Panoramic Camera Servicing, page to which I will refer for my operations.
To begin, I check the advance mechanism. Not much to report apart from maybe a misplaced puck. The film still tears.
I noticed that the different axles involved in the film transport were quite difficult to turn. Some tiny drops of vaseline oil deposited with a syringe at the friction points, and the film advance is anew perfect!
The Horizont Revision page indicates a problem with the light-tight foam of the lens turret. It is therefore necessary to check it.
Effectively, this foam is dead, it disintegrates and no longer does its office.
I replaced with thick foam covered with felt.
You can see here: Le blog de Pierre Tizien the first images made with this freshly revised camera.