Orion 9024, 9025, 9086 instruction manual Specifications

ing optical surfaces with your fingers, as skin oil may etch optical coatings.

To remove fingerprints or smudges from a lens, use photo- graphic-type lens cleaning fluid and lint-free optical lens cleaning tissue. Do not use household cleaners or eyeglass- type cleaning cloth or wipes, as they often contain undesirable additives like silicone, which don’t work well on precision optics. Place a few drops of fluid on the tissue (not directly on the lens), wipe gently, then remove the fluid with a dry tissue or two. Do not “polish” or rub hard when cleaning the lens, as this will scratch it. The tissue may leave fibers on the lens, but this is not a problem; they can be blown off with a blower bulb.

Never disassemble the telescope or eyepieces to clean opti- cal surfaces!

10. Specifications

Optical tube: Seamless aluminum

Objective lens diameter: 90mm (3.5")

Objective lens glass: crown and flint, achromat

Objective lens coating: fully coated with multi-coatings

Focal length: 910mm

Focal ratio: f/10

Eyepieces: 25mm and 10mm Kellner, fully coated, 1.25"

Magnification: 36x (with 25mm), 91x (with 10mm)

Focuser: Rack and pinion

Diagonal: 90° star diagonal, mirror type, 1.25"

Finder scope: 6x magnification, 30mm aperture, achromatic, crosshairs

Mount: German-type equatorial

Tripod: Aluminum

Motor drives: Optional

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