I recently bought a Voigtlander Avus 6.5 x 9 cm camera.
Would appreciate if anyone can tell me what type of filters (brand, size) will fit the lens.
It is a Skopar f/4.5 105mm lens.
The thread is on the inside of the tiny lens hood. I have never seen this design before but it must have been common once.
Measures 26mm across the front.
Are there current production filters available to fit a lens like this, or am I searching for old stock?