Mees, C. E. Kenneth (Charles Edward Kenneth), 1882-1960 · London : Wrattan & Wainwright · leaf 90
a device as the photochromo- scope. The filters to be used for projection are somewhat different both from the taking filters and also from the original narrow bands which we have hitherto assumed. In projection with the triple lantern, especially, the great difficulty is to obtain sufficient… … CURVE OF N/N7URRL BLUL— GFt-CEN MATCHING Pl>Rt LIGHT OF W.L. 5.^00 absorptions of the projecting filters should be abrupt, and that they should not appreciably overlap one another. Inasmuch as the taking filters do somewhat overlap, it is better to use a different set for purposes of projection.…
Color photography · Photography
Internet Archive · Gerstein - University of Toronto · Public domain (published before 1931). Free to use for anything.
