ExpoImaging ExpoAperture2 Manual (Imperial/Standard) User Manual
Page 14
ExpoAperture
2
Depth-of-Field Guide Manual
V 1.0
14
Format
Type of Film
Aspect
Ratio
Suggested CoC
in Microns
35mm half frame
135
0.75:1
17
APS-C
Advanced Photo System (APS)
1.5:1
use APS-C setting
35mm full frame
135
1.5:1
30
6 x 4.5 cm
120, 220, or 620
2
1.3:1
52
6 x 6 cm
120, 220, or 620
2
1.0:1
56
1
As based on a 0.254mm Circle of Confusion in an 8” x 10” enlargement of the captured image. See the main text in the
ExpoAperture2 Depth of Field Manual for a detailed description concerning the Circle-of-confusion calculation.
2
Kodak stopped producing 620 film in 1995, but it is possible to wind 120 film stock onto a 620 spool in a darkroom to enable
the use of cameras that can accommodate 620 film.
The following chart shows the range of full and fractional f/stops as they appear on the dial.
Not all cameras number the fractional f/stops as shown.
f/stops included on Aperture Dial
Apertures
in full
stops
⅓ stops
Apertures
in full
stops
⅓ stops
Apertures
in full
stops
⅓ stops
f/1
f/1
f/4
f/4
f/16
f/16
f/1.2
f/4.5
f/18
f/1.3
f/5
f/20
f/1.4
f/1.4
f/5.6
f/5.6
f/22
f/22
f/1.6
f/6.3
f/25
f/1.8
f/7.1
f/28
f/2
f/2
f/8
f/8
f/32
f/32
f/2.2
f/9
f/37
f/2.5
f/10
f/41
f/2.8
f/2.8
f/11
f/11
f/45
f/45
f/3.2
f/13
f/52
f/3.5
f/14
f/58
f/64
f/64