75 'lux and ND filter question......

[BigSteveG]

anyone have experience in shooting 75 'lux outdoors w/ ND filter? If so what's the best density? I'm thinking 4 stops will give me enough latitude for 100iso shooting. I see a bit of vignetting w/ a 6 stop ND on my 35 'lux. I understand the 75 is not prone to vignetting.....I'm thinking the 35mm issue may be due to the filter strength. Also, is B+W or Helopan producing 60mm ND's?

 

[ferider]

I shoot my 85-90s (f2) and 50s (f1.4) with ND filter and 100 ASA.
I find 3 stops best (the distance between 1/1000 and 1/125,
1/125 my minimum speed for these lenses). Also not too
many color changes with a good ND8 filter.

Roland.

 

[mfunnell]

Also, is B+W or Helopan producing 60mm ND's?

B+W apparently produces 60mm ND filters - but I've had no luck sourcing them from the Australian distributor, where they've been on back-order for months.

...Mike