Celestron C90 Mak τηλεσκόπιο / C90 MAK spotting scope

Περιγραφή

Τεχνικά Χαρακτηριστικά

• Brand
  Celestron
• Model / Name
  C90 Mak (C90 MAK Spotting Scope)
• SKU
  WLONONWCRE189
• MPN
  52268
• EAN / Barcode
  0050234522687
• Product Type
  Compact Maksutov-Cassegrain telescope / spotting scope
• Optical Design
  Maksutov-Cassegrain (catadioptric)
• Aperture
  90 mm
• Focal Length
  1250 mm
• Focal Ratio
  Approximately f/13.3–f/14
• Included Eyepiece
  32 mm Plössl, 1.25" (approx. 39x)
• Angular Field of View
  ~1.3° with included eyepiece
• Linear Field of View
  ~68 ft @ 1000 yd (≈20.7 m @ 1000 m) with included eyepiece
• Exit Pupil
  ~2.3 mm
• Eye Relief
  ~20 mm
• Close Focus
  ~15 ft (4.6 m)
• Relative Brightness
  5.3
• Twilight Factor
  ~59.2
• Coatings
  Fully multi-coated optics
• Prism Glass
  BaK4 (in erecting diagonal / prism elements)
• Diagonal
  45° erect-image diagonal included
• Finder
  8x21 finder included
• Mounting Interface
  Short Vixen-style dovetail; 1/4"-20 photo mount; T-adapter threads for camera
• Eyepiece Compatibility
  1.25" eyepieces only (not 2")
• Construction / Body
  All-metal optical tube; compact and portable
• Weight (product)
  ~2100 g (optical tube & accessories)
• Weight (package estimate)
  ~2600 g (with packaging)
• Dimensions (tube approx.)
  ~29–30 cm bare tube length; assembled with eyepiece ~40 cm
• Package Dimensions (approx.)
  41 cm x 25 cm x 17 cm
• Included Accessories
  32 mm Plössl eyepiece, 45° erect-image diagonal, 8x21 finder, objective cap, eyepiece cap, T-adapter threads, backpack-style carrying case
• Environmental
  Water-resistant (not nitrogen-purged), not fully waterproof; not nitrogen filled
• Best For
  Birdwatching, terrestrial spotting, travel, Moon and planetary observing
• Limitations
  Narrow field of view; not ideal for deep-sky astrophotography; no 2" eyepiece support
• Warranty
  Limited lifetime warranty reported by some resellers

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