Orion 102mm EQ - Manual (Page 14)

10. Specifications
Optical design: Maksutov-Cassegrain
Aperture: 102mm
Effective focal length: 1300mm
Focal ratio: f/12.7
Central obstruction diameter: 31mm
Primary mirror coating: Aluminum with overcoat
Meniscus lens coating: Anti-reflection multi-coatings on both sides of lens
Eyepiece adapter: Accepts 1.25" accessories, camera t-threads
Eyepiece: 25mm Sirius Plossl, fully coated with multi-coatings, 1.25" format
Magnification with supplied eyepiece: 52x
Actual field of view with supplied eyepiece: 0.92°
Diagonal: 90° mirror star diagonal, 1.25" format
Near focus (with supplied eyepiece & diagonal): Approximately 11 feet
Finder scope: 6x magnification, 26mm aperture, correct-image, achromatic, 6.3° field
Finder scope bracket: Dovetail base, spring-loaded X-Y alignment
Optical tube mounting block: Fits standard photo-style tripods
Mount: EQ-2, German-type equatorial
Slow-motion controls: R.A. and Dec. axes
Setting Circles: R.A. scaled in 10 minute increments, Dec. scaled in 1° increments
Counterweight: 4.8 lbs
Latitude range: 5° to 75°
Tripod: Adjustable-height aluminum legs, accessory tray included
Case: Deluxe carry case for optical tube included, padded case for EQ-2 mount optional
Motor drives: Optional
Weight: 21.9 lbs (tube 5.0 lbs, mount 16.9 lbs)
14
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. For the large
surface of the meniscus lens, clean only a small area at a time,
using a fresh lens tissue on each area. Never reuse tissues.