yes. it is.
I also found similar graphs on Schneider's web site. The graph in the lower right corner is especially pertinent to this discussion and explains the disparity between the B+W 060 (yellow-green) and the B+W 061 (greeen).
Schneider Optics filter transmission graphs (note: unfortuanately, this links to a pdf...arrrgh! )
Here's a link to the black & white filters section of the B+W filter guide book (pdf)
http://www.schneideroptics.com/info/...dbook30_35.pdf
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