ExpoImaging ExpoAperture2 Manual (Imperial/Standard) User Manual
Page 12
ExpoAperture
2
Depth-of-Field Guide Manual
V 1.0
12
The following chart shows the focal length of the lens markings on the dial.
Focal Length Dial Markings
15
15mm
45
45mm
●
16mm
50
50mm
●
17mm
●
55mm
18
18mm
60
60mm
20
20mm
70
70mm
●
22mm
●
75mm
24
24mm
●
80mm
28
28mm
85
85mm
●
30mm
●
90mm
35
35mm
●
100mm
●
40mm
105
105mm
●
42mm
●
120mm
45
45mm
135
135mm
2.D - f/stop and Circle-of-Confusion Dial
This dial contains two scales, one scale for the f/stops(blue)
and one for the circle-of-confusion(green).
The f/stop scale is calibrated in ⅓ stop increments from f/1
to f/64. It is used in conjunction with the Focus Zone Dial
to determine the number of zones in focus at a particular
f/stop or the f/stop to use in order to obtain the desired
number of zones in focus.
The Circle-of-Confusion, sensor size, or film format is set
using the green portion of the dial and by rotating the Focal
Length Dial until the correct setting shows through the cutout.
The following charts show sensor sizes and film formats for many popular makes and
models of cameras. If your camera is not included on this chart, please refer to your
camera’s manual which should include the sensor format or film size in the specifications
section.