In article <01bc2f06$4c9d0780$249d81ce@Ppoppie>, poppie@fidalgo.net says...

>Hi Harvey: For an equivalent of #25 Red, I'd suggest a factor 4X however if
>you are metering through the lens, you can probably ignore such
>compensation as the exposure system of the camera takes the light loss into
>consideration automatically. Bill

Hmmm, sorry, but, alas, the camera instruction manual to the contrary,
many (most? all? ['cept mebbe the F5...;-]) camera meters misread
strong colors, commonly as much as 1.5 stops with red... (take a
meter reading of a grey surface, and CHANGING NOTHING, put a red
no. 25 [3-stop filter] over the lens and take a new reading...;-)
Hope This Helps