Hubble Optics Ultra Light UL 16, Инструкция по эксплуатации

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Then use a cotton ball, starting at one edge, swab the mirror in one direction, applying
no pressure beyond the weight of the cotton itself. Grit is less abrasive wet than dry,
so do this step under water if you can. Don't let the surface dry.
Turn the cotton over in a backward-rolling motion as you go, so that as soon as a part
of it rubs the surface, that part is carried up and away from the glass. Throw out the
cotton ball when it has been turned completely. Keep a very small stream of tap water
flowing as you swab to rinse away detergent. Do not let the mirror surface dry or
water marks will form. Keep the stream of tap water going.
Drain the sink and run room-temperature water over the mirror for a few minute.
Step 3:
Finally, rinse the mirror surface with distilled water. Hold the mirror nearly upright so
the water runs off, leaving only small droplets behind. Your final rinse should be with
distilled water.
Repeat the process with the small secondary mirror.
5. Specifications
Optical design : Reflector
Optical diameter : 406mm
Focal length : 1829mm
Focal ratio : f/4.5
Optics type : Parabolic
Eyepieces: Not included
Optical quality : Diffraction + (Strehl 0.95+ for the Primary, 1/10 lambda or
for the secondary mirror)
Finder scope : Not included
Focuser : 2" dual-speed linear bearing Crayford
Secondary mirror obstruction : 80 mm
Secondary mirror obstruction by diameter : 19.7%
Secondary mirror obstruction by area : 3.9%
Mirror coatings/over-coatings : 92% Semi-Enhanced Aluminum coating on the
primary and 96% Enhanced coating on the secondary mirror
Materials : Aluminum Alloy (T6063-T6) tube with black stainless steel knob screws,
T6061-T6 Main structure, Structure Steel mirror cell
Length of optical tube : 70.0 in.
Weight, optical tube : 52.0 lbs.
Weight, fully assembled : 60.0 lbs.
Additional, optional accessories : 8x50 Finder, Shroud, Wheelbarrow, Vinyl foam
Cushioned Grips
Other features : Sling lateral support and deluxe push-pull brass knob collimation
screws
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