Anyone using a Voigtlander 150mm f/4.5 lens?

[Nas]

I'm looking for info regarding using filters for this lens. A 39mm filter is slightly too small and a 40.5mm is fractionally too large. I don't have anything in-between to try. There is a thread on the inside of the front lip. Anyone here using this lens? Thanks.

 

[MartyNL]

Yes, but I've never tried fitting any filters on it. I'll check and see if I can find anything that matches in my filter box.