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[APML]: Aerial lens: What filter/s?
G'day all,
I have a 4 element spaced 6" F6 aerial lens
but do not know what's brand could be. But it was used in WW2 as a surveillance
camera.
The 3 questions are; since it has been adapted
for 4x5 format and the lenses have been polished and AR coated, I need to know what filter I should use near the film plate
(DD slide). Where is a good source for sheet
acetate filters..are they costly?
Two, what min. aperture should this type of lens
be stopped down to to get optimium results?
thanks again fellas,
Jim