iOptron SmartStar A-R80 User manual

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INSTRUCTION MANUAL
Refractor Telescope
Specifications
Optical Design………………………Refractor
Clear Aperture………………………80mm
Focal Length………………………...400mm
Focal Ratio…………………………..f/5
Resolving Power……………………1.4 arc secs
Finder……………………….………..5x24
Weight………………………………..2.2lbs
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Lens Cover
Telescope
Main Tube
Dovetail
Plate Focuser 45° Erecting
Diagonal Mirror
Eye Piece
Dew
Shield

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How To Use Your New Telescope
Selecting an Eyepiece:
1. Always begin viewing with the lowest
power eyepiece. (Note: a 20 mm focal
length eyepiece is lower power than a 10
mm one.) A formula can be used to
determine the power of each eyepiece:
Telescope focal length divided by eyepiece
focal length equals magnification. Ex.
400mm ÷ 20mm = 20X (magnification)
2. Included with this telescope is a 45°
Erecting Diagonal Prism. The Erecting
Diagonal Prism is used to erect the image
you will see. Astronomical telescopes are
designed in such a way that the image you
see may be UPSIDE DOWN and
REVERSED. This is acceptable for viewing
celestial bodies.
Focusing Telescope:
1. After selecting the desired eyepiece aim
the main telescope tube at a land-based
target at least 200 yards away (e.g. A
telephone pole or building). Fully extend
focusing tube by turning the focus knob.
2. While looking through selected eyepiece,
slowly retract focusing tube by turning
focusing knob until object comes into
focus.
Aligning Finderscope:
1. Look through Main Telescope Tube and
establish a well-defined target (see
focusing telescope section). Tighten all
lock knobs (Declination, Latitude, Right
Ascension, Horizontal Axis) so that
telescope’s aim is not disturbed.
2. Looking through the finderscope,
alternate tightening each finderscope
Adjustment Screw until the crosshairs of
the finderscope are precisely centered on
the same object already centered in Main
Telescope Tube’s field of view.
3. Now, objects located with the
finderscope first will be centered in field of
view of the main telescope.
WARNING!
NEVER LOOK DIRECTLY AT THE SUN WITH YOUR TELESCOPE.
PERMANENT DAMAGE TO YOUR EYES CAN OCCUR.
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