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Telescope accessories
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Optical length
Optical length
The optically effective length of the component.
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1,0
(3)
-65
(2)
0
(12)
0,1 - 2,0
(3)
0,3
(4)
0,3, 0,5, 1
(2)
0,5
(7)
0,5/0,8/1
(2)
0,6
(1)
0,6-1,4
(1)
0,65
(1)
1
(17)
1,05
(1)
1,1
(1)
1,2
(1)
1,4
(1)
1,5
(9)
10
(15)
11
(3)
11,5
(1)
12
(6)
12,5
(2)
12,7
(1)
16
(1)
16-20
(2)
2
(10)
13
(1)
13,2
(1)
13,5
(3)
15
(9)
15 - 20
(2)
17
(3)
17 - 23
(1)
2,1
(1)
20
(3)
20,5 - 30
(1)
20,5 - 31
(1)
21
(2)
110
(14)
113
(1)
120
(2)
125
(2)
23,8
(1)
23-30
(1)
26,5
(1)
3
(8)
3,5
(2)
30,2
(1)
30,5
(1)
32 - 38
(1)
4
(4)
5
(18)
6
(5)
7
(7)
8
(6)
9
(5)
24
(1)
25
(7)
26
(1)
28
(1)
30
(11)
31
(3)
34
(1)
35
(5)
36,5
(2)
36,6
(1)
37,5
(2)
38
(1)
38,5
(1)
4,5
(2)
40
(8)
40,5
(1)
41
(2)
43
(1)
43-53
(2)
44
(1)
45
(1)
45,3
(1)
47
(3)
47,5
(1)
48
(2)
5,2
(1)
50
(5)
51,5
(1)
55
(1)
57
(1)
58 (2") & 50 (M54)
(1)
6,2
(1)
6,5
(2)
60
(1)
67
(1)
7,5
(9)
7,5 - 30
(1)
7,7
(1)
7/14/28
(1)
73
(1)
78
(1)
8,6
(1)
80
(1)
87,5
(1)
90
(1)
93,5
(1)
94
(1)
99
(1)
> -30
(1)
>90
(1)
>95
(1)
min 18
(1)
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Manufacturer
Baader
(2)
TS Optics
(1)
Price
< 60 $
(3)
Availability
short-term
(3)
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Categories:
Telescope accessories
Optical length:
1,0
Products 1 - 3 of 3
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TS Optics
Extension tube Fine Tuning Ring for T2-thread - thickness 1.0mm
$ 17.90
ready for shipping in
3-7 days
Baader
Extension tube Fine-tuning ring for M48 1.0 mm
$ 16.90
ready for shipping in
1-2 weeks
Baader
Extension tube Fine-Adjustment Rings T2 1mm
$ 14.90
ready for shipping in
1-2 weeks