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Eyepiece 20xSW |
Eyepiece 30xSW |
Eyepiece 45xSW |
Eyepiece 20-60xS |
Magnification |
20x |
30x |
45x |
20-60x |
Objective lens diameter (mm) |
– |
– |
– |
– |
Exit pupil, diameter (mm) for all Ø 65 |
3.3 |
2.2 |
1.4 |
3.3-1.1 |
Exit pupil, diameter (in) for all Ø 65 |
0.18 |
0.09 |
0.05 |
0.18-0.04 |
Exit pupil, diameter (mm) for all Ø 80 |
4 |
2.7 |
1.8 |
4-1.3 |
Exit pupil, diameter (in) for all Ø 80 |
0.16 |
0.11 |
0.07 |
0.16-0.05 |
Exit pupil, diameter (mm) for CTS 85 |
– |
2.8 |
1.9 |
4.3-1.7 |
Exit pupil, diameter (in) for CTS 85 |
– |
0.11 |
0.08 |
0.18-0.07 |
Eye relief (mm) |
17 |
20 |
18 |
17 |
Eye relief (in) |
0.67 |
0.79 |
0.71 |
0.67 |
Field of view, real (m/1000 m) |
60 |
42 |
28 |
36-20 |
Field of view, real (ft/1000 yds) |
180 |
126 |
84 |
108-60 |
Field of view, real (degree) |
3.44 |
2.4 |
1.6 |
2.1-1.1 |
Field of view, apparent (degree) |
66 |
66 |
66 |
40-65 |
Shortest focusing distance (m) |
– |
– |
– |
– |
Shortest focusing distance (ft) |
– |
– |
– |
– |
Diopter correction at 8 (dpt) |
– |
– |
– |
– |
Twilight factor (DIN 58388) for all Ø 65 |
36 |
44 |
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ThomasAz
Optics GrassHopper
Joined: March/14/2004
Status: Offline
Points: 2
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Posted: March/24/2004 at 14:02 |
Forgot to mention. I have a pair of 15x56 slc binoculars. Would you still recommend the 20x ? or go with the 30x ?
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Chris Farris
TEAM SWFA - Admin
swfa.com
Joined: October/01/2003
Location: Texas
Status: Offline
Points: 8024
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Posted: March/25/2004 at 13:51 |
The 15x is close enough to the 20x that I would go with the 30x for the spotter. The 30x has the longest eye relief of all their eye pieces at 20mm and is very easy to use. If your 15x56 SLC binocular did not come with a tripod mount I would suggest getting one for them while your at it (makes a huge difference).
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Peter
Optics GrassHopper
Joined: March/27/2004
Location: Australia
Status: Offline
Points: 5
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Posted: March/27/2004 at 00:45 |
Are you happy overall with your new spotting scope & why didnt you go for the High definition option
Regards
Peter
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bigmo101
Optics GrassHopper
Joined: November/22/2004
Location: United States
Status: Offline
Points: 4
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Posted: November/22/2004 at 06:36 |
The HD option works best at closer ranges. Its ment for bird watchers and doesn't do much good for long range stuff. There is a slight difference, but not much you can tell. The way I understand it, the more air you have between you and whatever you're looking at, the less of an advantage the HD spotter has.
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