UniCalc
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Optical devices
Eye
angle of view
δ
0
=
rad
x
μrad
mrad
rad
°
gon
object size
G =
m
x
Å
nm
μm
mm
cm
dm
m
km
n mile
in
ft
yd
distance to object
g =
m
x
Å
nm
μm
mm
cm
dm
m
km
n mile
in
ft
yd
1. Define values of all variables, besides sought quantity
2. Change units if necessary
3. Click "Calculate"