UniCalc
RU
full version
Own formula
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Optical devices
Magnifying glass
loupe magnification by accommodation of eye to best vision distance
V =
distance of best sight (25 cm for normal eye)
s =
m
x
Å
nm
μm
mm
cm
dm
m
km
n mile
in
ft
yd
focal distance of loupe
f =
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"