It is the total distance from the subject to the focal plane, (para 2-
One distance increases as the other decreases or visa versa, (para 2-
ID = FL x (S + 1).
OD = S
Move the ground glass farther away from the lens, (para 2-15a).
The ability to reproduce fine lines, (para 2-16a).
Normally two to two and a half stops above the maximum aperture of the
lens, (para 2-16c).
It is the distance from the nearest point of acceptable sharp focus, to
the farthest point of acceptable sharp focus of a subject being
photographed, (para 2-17a).
By focusing on a point one-third of the distance between the nearest and
farthest point of focus, (para 2-18).
The distance the focal plane can be moved forward and backward from the
point of exact focus and still retain an image of acceptable sharpness,
INF., (para 2-20).
1:2, (para 2-24b).
6x10-inches, (para 2-24c).
4, (para 2-25a).