CV 15mm LTM and filters?

[M like Leica M6]

The new bayonet mount version has a 52mm thread, the old one has nothing.

Did someone ever manage to mount a filter on the old version? A Cokin holder or snapon filter maybe?

 

[Bobfrance]

Yep.
Correct size of filter (can't remember the size off hand, but it's far snaller/cheaper than a 52mm), a little bit of tape wrapped round it, and push it in the tiny lip that surrounds the font of the lens. It's never fallen out.

 

[M like Leica M6]

Well, did you get it out when you needed to get it out? I am thinking about an IR filter...

Anyone ever put a Cokin A or P holder on that lens?

 

[Bobfrance]

Yeah, it's a simple push-fit.

Filter size was 39mm.
If you do a search on the forum you'll find there are numerous solutions available.