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Celestron 21082 Astromaster 80AZ Short Telescope

کد کالا : IAP-12076228

OPTICAL TUBE INFORMATION:
Optical Design:	refractor
diaphragm:	80mm (3.1")
Focal length:	400mm (15.74")
Focus Ratio:	f/5
Focal Length of Lens 1:	20mm (0.78")
Magnification of Lens 1:	20x
Focal Length of Lens 2:	10mm (0.4")
Magnifying Lens 2:	40x
Barlow Lens:	Not included
Finder:	StarPointer™ red dot finder scope
Star Diagonal:	Upright View, 90° (1.25")
Optical Tube:	Aluminum
Maximum Useful Magnification:	189x
Least Useful Magnification:	11x
Limiting Star Size:	12
Resolution (Rayleigh):	1.74 arc seconds
Resolution (Dawes):	1.45 arc seconds
Light Gathering Power (Compared to human eye):	131x
Secondary Mirror Obstacle:	25mm (1")
Secondary Mirror Obstacle by Area:	4.96%
Secondary Mirror Obstacle by Diameter:	22%
Optical Coatings:	Fully Coated
Optical Tube Length:	184mm (7.24")
Optical Tube Diameter:	90mm (3.54")
Optical Tube Weight:	2.65 pounds (1.2 kg)
swallowtail:	CG-5 Dovetail rod
INSTALLATION INFORMATION:
Mounting Type:	Manual Alt Azimuth
Height adjustment range (including mount and tripod):	812.8mm - 1295.4mm (32"-51")
Tripod Foot Diameter:	31.75 mm (1.25") steel legs
Accessory Tray:	Yes
Turning Speeds:	Manual
Tripod Weight:	3.6 kg (7.9 lb) including mounting weight
Dovetail Compatibility:	CG-5 saddle plate
Software:	Celestron Starry Night Basic Edition Software and SkyPortal App
Total Telescope Kit Weight:	10.55 pounds (4.78 kg)
Included Items:	optical tube Mount and tripod (pre-assembled) 20 mm and 10 mm eyepieces StarPointer™ red dot finder scope Upright image diagonal Guide