Old School" methods of shuter speed testing... | Photrio.com Photography Forums
Filmomat - The PhotoPlug Shutter-Speed Tester. Available in the Filmomat online store and at Fotoimpex :) www.filmomat.eu/shop https://www.fotoimpex.de/shop/kameras-zubehoer/filmomat-photoplug-verschlusszeiten- tester.html | Facebook
Laser Shutter Tester (for analog camera) - YouTube