Help--39mm b&w filters for voigtlander

[traveler_101]

Hi guys

I am looking for a no. 2 yellow and orange filters for for my 25mm and 35mm vc lenses. According to this chart, http://www.1839.org/hors/trucs/polar...1.html?lang=en
the filters must have an EXTERNAL thread to attach the hood. Is this correct? I can't find any mention of external thread in the various camera outlets selling filters or on e-bay. Can't even find a photograph that indicates that the filter might have an external thread. Any suggestions greatly appreciated. Thanks!

[Kim Coxon]

I think you misread the table.

Many of the CV lenses have an external thread or bayonet on them to attach the hood. ie, there is no need to attach to filter between the hood and lens. I think the table is referring to the lens rather than the filter you need.

Kim

[traveler_101]

Thanks for the help.