I am trying to find out how the use of high output full spectrum or daylight bulbs (325watt and up) will affect the exposure times for shooting paper negative portraits.
I normally work outdoors with period cameras but have been asked by a museum to do a demonstration indoors this february. They want me to use paper negatives to keep costs down and I will be suffering from horrendous exposure times. I will be using ilford multigrade 4 and possibly harman direct positive.
Ideally I would like to keep exposure times under 30s. Has anyone tried using The Daylight bulbs in this way and if so what were the effects?
Your thoughts are much appreciated.
I am using a cycle poco no.5, 4x5, f7