SKY-WATCHER 80mm, Owner'S Manual

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Model 80 mm 100 mm 120 mm
SKU
S11100 S11120 S11130
UPC
050234111003 050234111201 050234111300
Optical design
Apochromatic refractor
Focal length
600 mm 900 mm 900 mm
F-ratio 7.5 9 7.5
Lens elements 2
Lens glass FPL-53 ED and Schott BK-7 glass
Focuser 2 inch dual-speed Crayford-style
Eyepieces 5 mm and 20 mm 1.25 inch eyepieces
Finderscope 8 x 50 right angle, correct image
Highest useful magnification 189x 236x 283x
Lowest useful magnification 11x 14x 17x
Limiting stellar magnitude 12 12.5 12.9
Resolution (Rayleigh) 1.74 arc seconds 1.39 arc seconds 1.16 arc seconds
Resolution (Dawes) 1.45 arc seconds 1.16 arc seconds 0.97 arc seconds
Light gathering power
(compared to human eye)
131x 204x 294x
Mount type V-style dovetail
Tube length (inches) 23.8 36.2 37.8
Outer diameter (inches) 4.5625 4.5625 5.625
Tube weight (pounds) 7.3 8.4 13.9
Specifications
Dew shield
Optical tube
Tube rings
Finderscope
Finderscope
adjustment screws
Finderscope
tension screw
1/4”-20
camera adapter
V-style mounting plate
Eyepiece
1.25” adapter
Dielectric diagonal Dual-speed
Crayford-style focuser
Tube ring
locking clamp
(not shown)