Moonfish 80ED Manual

Thank you for choosing this Moonfish® 80ED
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!
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

Retractable dew Combined equatorial mount
shield dovetail and L-bracket
tripod mounting shoe
Dust cover
Brass
compression ring
1.25" eyepiece
adapter
Moonfish® 80ED Apochromatic Refractor Specifications
Aperture ........................................................ 80mm (3.1")
Focal Length ......................................................... 550mm
Focal Ratio ................................................................ f/6.9
Objective Type ........ air-spaced doublet with ED element
Optical Coatings..................................... fully multicoated
Resolving Power (Dawes' Limit) ......... 1.45 arc seconds
Visual Limiting Magnitude ...................... 12.0 maximum
Light Grasp (versus the eye) .................................... 131x
Field Stops ....... 10 glare-reducing baffles in optical tube
Focuser .................................... dual-speed Crayford-type
with 11:1 reduction ratio fine focus;
360° rotating camera angle/observing angle adjuster;
and 2" and 1.25" compression ring eyepiece holders
Focuser Travel ............................................. 3.1" (80mm)
with millimeter scale on drawtube for repeatable focus
Lens Shade ..................................................... retractable
M
M
M
high quality apochromatic refractor. While some observers might doubt that apochromatic
Never aim your 80ED
Locking collar for 360º
rotatable focuser
1/4"-20 thread
tripod mounting
holes in base of
Lock know for
bracket
focuser drawtube
1.25" eyepiece
lock knob
Objective Lens Cover..................................... slip-on metal
Tripod Mount ...
Tube Diameter................................................... 90mm o. d.
Tube Length (lens shade retracted) .............. 18" (457mm)
Tube Length (lens shade extended)......... 20.75" (527mm)
Optical Tube Weight ................................. 6.55 lbs. (3 kg)
Case......................................... aluminum-frame foam-fitted
Case Dimensions ........................
Lowest Usable Power................. 13.75x (40mm eyepiece)
Highest Terrestrial Power ................ 78x (7mm eyepiece)
Highest Practical Power.................. 137x (4mm eyepiece)
Theoretical Maximum...................... 183x (3mm eyepiece)
o o n f i s h 8 0 E D
o o n f i s h 8 0 E D
®
o o n f i s h 8 0 E
®
®
at the Sun without having a professionally-manufactured
Mointing point for
optional finder
Left coarse
focus knob
2" eyepiece
holder
Brass
compression ring
removable combination L-bracket and
dovetail with 1/4"-20 thread mounting holes for photo
tripod use as well as direct mounting on Celestron,
Meade, and Vixen German equatorial mounts
lockable hard case, with carrying handle
D
Focusing
scale on
focuser
drawtube
Fine
focus
knob
Right
coarse
focus
knob
2" eyepiece
lock knob
22.25" x 12.5" x 7.5"