12
TECHNICAL SPECIFICATIONS
Optical Design
Diameter
Focal Length
F/ratio
Highest Practical Power
Eyepiece Magnification
Faintest Steller Magnitude
Resolving Power (arc sec.)
Finderscope
Barrell Diameter
Mount Type
Tripod
Tube Dimension
Eyepieces
Diagonal
Barlow
Newtonian Reflector
76mm
300mm
f/4
152X
30X (10mm), 83X (3.6mm)
12
1.5
5x24 (90˚)
1.25"
Equatorial
Table Top
10cm x 27cm
Super 10mm, Super 3.6mm
No
2X
Refractor
80mm
350mm
f/4.4
160X
17.5X (20mm), 97X (3.6mm)
12.2
1.45
Red Dot Finder
1.25"
Equatorial
Table Top
10cm x 30.5cm
Super 20mm, Super 3.6mm
90˚
2X
Optical Design
Diameter
Focal Length
F/ratio
Highest Practical Power
Eyepiece Magnification
Faintest Steller Magnitude
Resolving Power (arc sec.)
Finderscope
Barrell Diameter
Mount Type
Tripod
Tube Dimension
Eyepieces
Diagonal
Barlow
Refractor
80mm
400mm
f/5
160X
20X (20mm), 111X (3.6mm)
12.2
1.45
Red Dot Finder
1.25"
Equatorial
Table Top
10cm x 38cm
Super 20mm, Super 3.6mm
90˚
2X
Maksutov
90mm
1250mm
f/13.8
180X
50X (25mm), 125X (10mm)
12.5
1.3
Red Dot Finder
1.25"
Equatorial
Table Top
10cm x 23cm
Super 25mm, Super 10mm
90˚
2X
The sky is mapped out in a spherical coordinate system similar to the system of Latitude and
Longitude on the surface of the Earth. On the imaginary celestial sphere, the coordinates are
Declination, which is equivalent to Latitude and measured in degrees, and Right Ascension,
which is equivalent to Longitude, but measured in hours. The celestial equator is a projection of
the Earth's equator onto the celestial sphere. Because the positions of stars and other distance
celestial objects, as plotted on this celestial sphere, change very slowly with time, their listed
coordinates and star charts are only updated every fifty years. On the other hand, planets change
position so rapidly that their coordinates must be obtained from current astronomy periodicals.
The setting circles on your equatorial mount can be aligned with the celestial sphere to aid in
finding astronomical objects.
F
inding objects in the sky
SK 76/300 EQ/TA
SK 80/350 EQ/TA
SK 80/400 EQ/TA
SK MAK90 EQ/TA
Canada:
Tel: 604-270-2813 between 9:00AM and 4:00PM PST, Fax: 604-270-2330
E-mail: [email protected]
Outside Canada:
Please contact your dealer for technical support.
TECHNICAL SUPPORT
www.SkywatcherTelescope.com
