Celestron STAR HOPPER - Technical Specifications

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TECHNICAL SPECIFICATIONS
Listed below is technical information pertinent to the
Celestron Star Hopper
®
4
½
,
6
and
8
telescopes.
Star Hopper
®
4.5
Item # 10400
Star Hopper
®
6
Item # 10600
Star Hopper
®
8
Item # 10800
Optical system Newtonian Newtonian Newtonian
Aperture 4.5" (114mm) 6" (152mm) 8" (203mm)
Focal length 910mm (35.8") 1220mm (48") 1220mm (48")
F/ratio f/8 f/8 f/6
Ocular:
Apparent field
Magnification
25mm SMA
52º
36x
25mm SMA
52º
49x
25mm SMA
52º
49x
Secondary mirror diameter:
Obstruction
Aluminized surface
1.25" or 7.7% by area
1.2"
1.5" or 6% by area
1.5"
1.5" or 4% by area
1.5"
Primary mirror Coated glass Multicoated Pyrex Multicoated Pyrex
Highest useful power 270x 360x 480x
Lowest useful power 16x 22x 29x
Resolution: Rayleigh Criterion
Dawes Criterion
1.21 arcseconds
1.01 arcseconds
0.91 arcseconds
0.76 arcseconds
0.68 arcseconds
0.57 arcseconds
Field of view with standard eyepiece 1.4º 1.1º 1.1º
Exit pupil with standard eyepiece 3.1mm 3.1mm 4.1mm
Light gathering power 267x unaided eye 474x unaided eye 843x unaided eye
Limiting visual magnitude 12.8 13.4 14.0
Optical tube length 35" 52" 52"
Tube outer diameter 5.5" 8.50" 10.50"
Focuser: Rack and Pinion Rack and Pinion Rack and Pinion
Focuser height (minimum) 3" 3" 3"
Focuser travel 2" 2" 2"
Focus (distance from tube edge) 4
"
3.5" 3.25"
Tube weight 6 lbs. 18 lbs. 5 oz. 24 lbs. 14 oz.
Mount design Dobsonian hybrid Dobsonian hybrid Dobsonian hybrid
Mount weight 12 lbs. 21 lbs. 1 oz. 30 lbs. 6 oz.
Shipping weight & dimensions 35 lbs. (17x17x41) 24 lbs. (17x61x18) 30 lbs. (17x61x18)
(given in inches) 31 lbs. (24x24x6) 41 lbs. (24x24x6)