Pre-exposure of B&W and color 4x5 film

[Jim Billlups]

Does anyone know of any good websites that go into detail on how to pre-expose b lack and white and color film ?

Thanks

[John Lehman]

No, but Ansel Admam's _The Negative_ has all the details

[John Lehman]

Make that: Ansel Adam's _The Negative_ has all the details

[Hans Berkhout]

I'd suggest that you consider buying a Wallace Photo/Expo Disc from George Wallace (gwallace@expodisc.com). You keep it in your filter wallet until you need it in the field. It is a diffuser which you snap on the front of your lens after you have taken an exposure reading through it with you light meter-which gives you a reading for zone V. Then set your shutter/diafragm for a zone II exposure and shoot with the diffuser in place on your lens. Now you have a pre- exposed film in your filmholder.

They come in different sizes corresponding to the filter size. See A.Adams as suggested previously.

Hans Berkhout.