DobMod
DOBSONIAN TELESCOPE EXPERIENCE, MODIFICATIONS, TIPS, REFERENCE, HINTS, IDEAS, WHISHES
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Showing posts with label
diameter
.
Show all posts
Showing posts with label
diameter
.
Show all posts
Tuesday, February 17, 2015
The Beginner's FAQ (for a friend of mine, in Russian)
Отвечаю на вопросы "телезрителей".
1. Когда прикручиваешь мотор - ручку точной настройке крутить уже нельзя, так?
В моторе жыж нету сцепления?
То есть получается что с навинченным мотором точно никак не навестись или есть какойто трюк?
Read more »
Thursday, July 7, 2011
My Zhumell 12" dob specifications
Apperture
- 305 mm (12 inch)
Focal Length
- 1500mm
Focal Ratio
- f/4.93
Star Diagona
l - 1.25 Inches (32 mm)
Finderscope
- 8x50
GoTo
- No
Weight Complete
- 75 lbs (34 kg)
Total height
- 63 inches (160 cm)
OTA length
- 60 inches (152.5 cm)
Base height
- 27 inches (68.5 cm)
Base diameter
- 25.5 inches (65 cm)
Calculated
Aperture Gain
- 1900
Visual magnitude limit
- 14.2
Max FOV
- 1.9 deg
Resolution
- 0.38 - 0.68 sec
Maximal Magnification
- 300
Optimal Magnification
- 150
Minimal Magnification
- 42
Absolute Maximum Magnbification -
750
See the great
Telescope Equations
site for the underlying theory and formulas.
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