Yes, i am a NDx400 user
No, i am not a NDx400 user/what is NDx400?
Will consider NDx400
NDx400 - is a waste of $$
Anyone know how much does a 58mm NDx400 cost?
Not for digital, only film users need worry about reciprocal failure.
This filter has a lot of pros and cons...but i normally use it for long exposures during mid-day landscape photography. Just a tip learn how to compute the correct exposure so can easily get the best results out of this filter. Oh btw, when stacking filters...specially with CPL, place the ND400 first before CPL.