looking for ways to adapt square filters to these lenses I have found the following options:
a) Benro FH100 V1: It seems it was selling only in Vietnam. Did not found anywhere to buy out of vietnam. 100mm filters. 80€. Unsure if only is usable with 15mm heliar.
b) Bombofoto Laser100SE2 100mm Special for Voigtlander.100mm filters. 95€
c) Bombofoto Zorro100: Ultra-Wide Filter Holder, High-Grade Anti-Shine. 100mm filters. 110€
d) NISI holder. 150mm filters. 110€
e) Cokin P Series P499 Universal ring. This just the ring. holder to be bought separatedly. 100mm?. 40€
f) PHOTOSPHERE-SG, 10mm F5.6 hyper wide. 100mm. 80€
Just lookig at the photographs:
a) looks solid. usable in 10/12mm?
b)c) no idea about quality. looks usable
d) looks very goo, but 150size is very large. Intended more for the 10mm?
e) no idea if it works with these objectives. looks the less atractive but the mroe universal of all solutions
f) very light and compact.
Maybe some other solution is available and simply did not found it. Anybody has any experience with any of them?
I have the Bombo laser, works fine for the CV 10 along with normal filtering of other lenses. It's so thin, you can't use gaskets, that's why it can filter the CV 10 without going up a notch in filter size.