For most but not for all.
Originally Posted by R Paul
Some years ago one of my friends (?) gave me a doorstop, in the form of the cells from a 36"/8 Bell & Howell telephoto mounted in a light-tight collar the right length. The glass was horrible; scratched, filthy, a little fungus here and there. After I tired of stubbing toes on it I offered it for the cost of shipping on the LF forum. The person who asked for it said he'd use it wide open for shooting wet plate. After it landed on his porch told me he was delighted to have it.