Hi, I dont know if this is the correct forum, but I wanted to share and learn using ND filters on digital M's. Please feel free to contribute:
Learnings so far: + "A" works ok. + I use a 67mm ND11 with step down rings for different lenses. + The effect is pleasing (at least for me) - I get some strange flares on 90/4 macro, and sometimes on 50/2. Havent found the cause, but suspect light leakage in lens. - The WATE filter adapter seems to have some strange threads, not compatible with other lenses? - If I use the WATE filter adapter on WATE I have to mask the small window in adapter to avoid flares due to ligh coming from behind the lens. Here is a test with Hoya ND11 (-11 EV) on a 35/1,4 FLE on a M240 (aprox 16 seconds?). In heavy snowing: L1009355 by Alf Sollund, on Flickr