8
Specifications
--
Type Porro prism central focusing
type
ACULON
A211
Model
I
7xso
··r
I
I 8-18x42
7x35
8x42 10x42 10x50
I
12x50
16x50 1 0-22x50
I
Magnification
(x)
7
8
10
7
10
I
12
16
8-18 10-22
Effective diameter
of
objective
35
42 42
50
50
I
50 50
42 50
lens (mm)
t
--
Angular field
of
view (real) n
9.3
8.0 6.0 6.4
6.5
5.2
4.2 4.6**
3.8***
Angular field
of
view
59.3 58.4
55.3
42.7
59.2
57.2
60.8 35.6** 36.7***
(apparent) (
0
)*
Field
of
view 1,000m (m/ft.)
163/488 140/420 105/314 112/335 114/341
91/272 73/220 80/241
**
66/199***
Exit pupil (mm)
5.0
5.3
4.2
7.1
5.0
4.2
3.1
5.3** 5.0***
Brightness
25.0
28.1
17.6
50.4 25.0
I
17.6
9.6
28.1
**
25.0***
--
--
Eye
relief (mm)
11.8 12.0 11.6 17.6 11.8 11.5 12.6
1 0.3** 8.6***
Close focusing distance,
5.0/16.4 5.0/16.4 5.0/16.4 8.0/26.2 7.0/23.0
8.0/26.2 9.0/29.5
13.0/42.7
15.0/49.2
approx. (m/ft.)
Interpupillary distance
56-72 56-72 56-72
56-72 56-72 56-72 56-72 56-72 56-72
adjustment (mm)
Length (mm/in.)
118/4.6 145/5.7
145/5.7 180/7.1 179/7.0 179/7.0 179/7.0 163/6.4 197/7.8
Width (mm/in.)
185/7.3 185/7.3 185/7.3 197/7.8 197/7.8 197/7.8 197/7.8 185/7.3 197/7.8
Weight (g/oz.)
685/24.2 755/26.6 760/26.8
905/31.9 900/31.7
910/32.1
925/32.6 825/29.1 960/33.9
*Apparent
field
of
view
is
calculated based on
the
15014132-1:2002 standard, and obtained
by
the
following
formula:
[tan
w'
= r x
tanw]
Apparent field
of
view:
2w',
Magnification:
r,
Real
field
of
view: 2w
**When
minimum
magnification (8x)
is
selected
***When
minimum
magnification
(1
Ox)
is
selected
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