Quote Originally Posted by Two23 View Post
There's the possibility you could start running into reciprocity failure. Never tried this but I thought I'd mention it. I shoot at night a lot using HP5 film, and am not aware of any different "wave lengths." Light seems to be light.

Kent in SD
Well since paper negatives are only sensitive to blue/green light as I understand it, then shooting at night would pose a problem since the light at night is coming mainly from street lights which usually have a very red or orange tint to them. Which is why I thought that I might need to add a couple stops of time to compensate for the effect.