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Thank you for choosing this Moonfish® 80ED high quality apochromatic refractor. While some observers might doubt that apochromatic
performance can be had in an 80mm scope that costs as little as the 80ED, we can say only that seeing is believing.
The images from its 550mm f/6.9 ED (Extra-low Dispersion glass element) air-spaced doublet optics are virtually colorfree, even at high
magnifications. At its low price, we believe you’ll find that the optical performance of your 80ED is little short of astonishing.
This instruction manual will provide you with information on how to get the most out of your new telescope, and how to properly maintain
your telescope so it can give you a lifetime of observing enjoyment.
Please familiarize yourself with your telescope’s parts and functions before operating it for the first time.
Caution! Never directly view the Sun with your telescope! Never aim your 80ED at the Sun without having a professionally-manufactured
solar filter mounted over the objective lens. Viewing the Sun through the scope without the proper protection for even a moment may result in
permanent severe damage to your eyes, and can even cause blindness.
PARTS OF THE 80ED
Moonfish® 80ED Apochromatic Refractor Specifications
Aperture ........................................................ 80mm (3.1”) Objective Lens Cover..................................... slip-on metal
Focal Length ......................................................... 550mm Tripod Mount ... removable combination L-bracket and
Focal Ratio ................................................................ f/6.9
dovetail with 1/4”-20 thread mounting holes for photo
Objective Type ........ air-spaced doublet with ED element
tripod use as well as direct mounting on Celestron,
Optical Coatings..................................... fully multicoated
Meade, and Vixen German equatorial mounts
Resolving Power (Dawes’ Limit) ……... 1.45 arc seconds Tube Diameter................................................... 90mm o. d.
Visual Limiting Magnitude ...................... 12.0 maximum Tube Length (lens shade retracted) .............. 18” (457mm)
Light Grasp (versus the eye) .................................... 131x Tube Length (lens shade extended)……... 20.75” (527mm)
Field Stops ……. 10 glare-reducing baffles in optical tube Optical Tube Weight ……........................... 6.55 lbs. (3 kg)
Focuser .................................... dual-speed Crayford-type Case......................................... aluminum-frame foam-fitted
with 11:1 reduction ratio fine focus; lockable hard case, with carrying handle
360° rotating camera angle/observing angle adjuster;
Case Dimensions ........................ 22.25” x 12.5” x 7.5”
and 2” and 1.25” compression ring eyepiece holders
Lowest Usable Power................. 13.75x (40mm eyepiece)
Focuser Travel ............................................. 3.1” (80mm) Highest Terrestrial Power ................ 78x (7mm eyepiece)
with millimeter scale on drawtube for repeatable focus
Highest Practical Power.................. 137x (4mm eyepiece)
Lens Shade ..................................................... retractable Theoretical Maximum...................... 183x (3mm eyepiece)
Dust cover
1.25” eyepiece
lock knob
Retractable dew
Focusing
scale on
focuser
drawtube
Fine
focus
knob
Right
coarse
focus
knob
Left coarse
focus knob
2” eyepiece
lock knob
2” eyepiece
holder
Mointing point for
optional finder
Brass
compression ring
Brass
compression ring
1.25” eyepiece
adapter
Lock know for
focuser drawtube
Locking collar for 360º
r
l
f
r
Combined equatorial mount
dovetail and L-bracket
tripod mounting shoe
1/4”-20 thread
tripod mounting
holes in base of
bracket
(34 pages)
(10 pages)
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