Our exclusive Depth-of-Field Finder
(DFF1) tells you the precise depth of field you'll get with all
popular 4x5-format lens focal lengths. First, you "measure"
the camera's bellows, then you set a sliding cursor to read the
distances between which your subject will be sharp. It has scales
for focal lengths from 75mm to 360mm; its slider's color-coded lines
indicate depth of field for apertures from f/22 to f/64. Imprinted
instructions also include how to locate your lens's nodal point
and read hyperfocal distance – often a source of confusion
for photographers trying to compute bellows extension factors. Whether
in the studio or on location, the Depth-of-Field Finder ends the
computation – or the guesswork – involved in controlling
sharpness.
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•Depth-of-Field
Finder determines depth of field for large-format
lenses at any shooting distance.
• Displays
the near and far limits of subject sharpness at most
Depth-of-field
calculating device for 4x5-format view camera photography
(DFF-1). Made of flexible laminated plastic; imprinted
with scales for all popular 4x5 format lens focal
lengths. Measures 31/8 by 201/4 inches. One side features
lens-to-subject distance scale; the other features
scales along which a color-coded slider moves to show
near and far limits of sharpness.
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