Orion 9968 instruction manual Specifications, Cleaning the Tube, Cleaning Lenses

Cleaning the Tube

Your SkyView Pro 150mm EQ telescope requires very little mechanical maintenance. The optical tube is aluminum and has a smooth painted finish that is fairly scratch-resistant. If a scratch does appear on the tube, it will not harm the tele‑ scope. Smudges on the tube can be wiped off with a soft cloth and a household cleaning fluid.

Cleaning Lenses

Any quality optical lens cleaning tissue and optical lens clean‑ ing fluid specifically designed for multi-coated optics can be used to clean the telescope’s meniscus lens or the exposed lenses of your eyepieces and finder scope. Never use regu‑ lar glass cleaner or cleaning fluid designed for eyeglasses. Before cleaning with fluid and tissue, however, blow any loose particles off the lens with a blower bulb or compressed air. Then apply some cleaning fluid to a tissue, never directly on the optics. Wipe the lens gently in a circular motion, then remove any excess fluid with a fresh lens tissue. Oily finger‑ prints and smudges may be removed using this method. Use caution; rubbing too hard may scratch the lens. On larger lenses, clean only a small area at a time, using a fresh lens tissue on each area. Never reuse tissues.

10. Specifications

Optical design: Maksutov-Cassegrain

Aperture: 150mm

Effective focal length: 1800mm

Focal ratio: f/12.0

Central obstruction diameter: 47mm

Primary mirror coating: Aluminum with Si02 overcoat

Meniscus lens coating: Anti-reflection multi-coatings on both sides of lens

Eyepiece adapter: Accepts 1.25" accessories, camera T- threads

Eyepieces: 25mm and 10mm Sirius Plössls, fully coated with multi-coatings, 1.25" format

Magnification with supplied eyepieces: 72x (with 25mm) and 180x (with 10mm)

Diagonal: 90° mirror star diagonal, 1.25" format

Finder scope: 8x magnification, 40mm aperture, chromatic, 5.33° field of view

Finder scope bracket: Dovetail base, spring-loaded X-Y alignment

Optical tube mounting plate: Fits standard photo-style tripods and SkyView Pro equatorial mount

Mount: SkyView Pro, German equatorial

Tripod: Steel, adjustable height, includes support tray

Counterweights: 4.0 j. and 7.5 lbs.

Polar axis latitude adjustment: 8° to 70°

Polar axis finder: Optional

Motor drives: Optional

Weight: 50.3 lbs. (tube 13.3 lbs. mount 37.0 lbs.)

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