Distance Scale - Canon EF 400mm f/2.8L IS USM Instructions Manual

9. Depth-of-Field Scale
ft
30 70
m
10 20
32 32
The depth of field is the distance in front of and
behind the plane of focus on the subject that
appears sharp. The depth of field is indicated by
the area between the depth-of-field scale lines
below the distance scale. The numbers on the
scale are F values.
The depth-of-field scale is an approximate indicator.
ENG-13