Can DOF affect Exposure?

[Ed Sukach]

Got it .... From the B&W catalog: "Filters Special Effects Acessories From the Pros to the Pros":

The filter is a B&W090 "Light Red" - equivalent to a Wratten 25 or Hoya R25.
The filter factor is given as 5 - requiring a filter correction of 2 1/4 stops- close enough to the 2 1/2 used.

All I can say is "That is what happens when a B&W090 is used to photograph roses".

[dr bob]

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.