Helios 1984:
Topcon 35-L / 35-S / 35-JL Troubleshooting
Helios 1984:
Seikosha MXL Shutter & Aperture Blades
Helios 1984:
Topcon 35-L Maintenance - Front Disassembly
Helios 1984:
Olympus Pen-EE2 - Stuck Aperture Blades
Helios 1984:
Rondinax Maintenace - Cleaning the cassette peg & socket
Helios 1984:
Topcon 35-L Maintenance - Removing the Top Cover