Mix and matching different brands of ND filters?

[ed_lee83]

I have one Schneider ND filter but desperately need to find another one soon for an upcoming shoot.
There is a Tiffen and Century available but am worried if there are any adverse effects in mixing different brands of ND filters..
Am I right to worry?

 

[Alex H.]

Shouldn't be a problem.

 

[GrumpyDiver]

Century = Schneider = B&W. Same company; same filters, if you are worried. The Tiffens tend to be a cheaper line and I have had some flare / reflection problems with them.