Quote Originally Posted by Ole
Truly, dr bob,
You haven't read the question thoroughly enough: He DID use a spotmeter (Pentax V). Also, the "90" filter is not a wratten designation, but a B+W type number entirely unrelated to the Wratten codes...
Thanks for the edification. I have no knowledge of B+W filters. Rereading the original post I don't see any referal to the brand of filter. I have often wished to see a comparitive chart of the various filters. There have been some implied work (A. Adams - Schaffer Vol I e.g.) but where is a comprehensive list?

Truly, dr bob.