100mm f/2.8
127mm f/4.7
150mm f/5.6
21' 5¼" 12' 4 ¼ " 9' 4 ½ " 7' 11¾"
33' 7½" 16' 2½" 10' 8"
7' 11½"
6'
6’
250mm f/5 and 250mm f/8
30
20
15
12
10
5
The
minimum
aperture of 250mm
f/5
lens is
45;
figures
in
the red frame indicate
50
that for the 250mm f/8
lens.
