Bromide paper : instructions for contact printing and enlarging (1896)
Just, E. A · Bradford : P. Lund, Humphries · leaf 25
eived hy n p would be 36 times greater than the amount of the direcft exposure. If we take the diredt exposure of the light upon the negative to be equal to i, the exposure of the refle(5for is 36, the total exposure oi n p would therefore be 37. As, however, N P \s situated at one half the… … Placing these results together, we get : — , — Exposure — n of P oinp Without reflecflor 4 i With reflecftor 40 37 Advantages of ReflecTtor. — We see, therefore : — I St. The great advantages to be gained by employing a refledfor. 2nd. To what a trifling amount the defecfl: is reduced which is…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
