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Orion - 6x30 Finder Scope Correct-Image


  • You don't have to be a contortionist to use this 6x30 finder scope which features a 90-deg viewing angle and correct daytime image orientation
  • Right-angle design lets you aim your telescope in comfort - no more crouching or craning your neck!
  • This crosshair finder scope makes aiming easy by showing an upright, non-reversed image
  • Finder scope features substantial 6x magnifying power, 30mm diamter objective lens and 7-deg field of view
  • Fully coated, achromatic glass optics yield crisp, bright images

59,00 EUR

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Orion - 9x50 Achromatic Finder Scopes


  • Large 50mm finder scope lets you see fainter objects than with smaller scopes
  • 9x magnification and a standard (inverted) 5.5-deg field of view with superimposed crosshairs
  • Includes a cast-aluminum bracket with a dovetail foot that fits most Orion telescopes
  • Mounting base available for installation on non-Orion telescopes

79,00 EUR

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Orion® - 9x50 Right-Angle Correct-Image Finder Scope


  • A powerful 9x crosshair finder scope with a comfortable right-angle viewing orientation
  • 50mm diameter lens provides a bright image through the finder for easy aiming anywhere in the sky
  • Right-angle design lets you use the finder without crouching or craning your neck in an awkward position
  • Internal correct-image prism provides a daytime oriented view through the finder - not upside down as with standard finders
  • Fully coated glass elements minimize reflection to yield crisp, bright images with a 5° field of view

107,00 EUR

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Orion - 9x50 Illuminated Right-Angle CI Finder Scope


  • Deluxe 9x50 finder scope enhanced with red-illuminated crosshairs, correct-image view and right-angle eyepiece orientation
  • Bright, 50mm aperture finder scope with 9x power magnification and a wide 5° field of view
  • Adjustable brightness red-illuminated double crosshairs make it easy to aim your telescope at night
  • Right-angle eyepiece orientation eliminates neck strain for comfortable telescope aiming
  • Natural correct-image finder scope matches naked-eye view for easy pointing

149,00 EUR

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Orion - 9x50 CI Solar Finder Scope


  • Big 9x50 correct-image finder scope with a protective solar filter for safe and accurate aiming of a solar filter-equipped telescope at the Sun
  • Black-polymer film solar filter material displays the Sun in a natural yellow-orange color
  • Comfortable right-angle viewing orientation
  • Correct left-to-right and top-to-bottom image for easy aiming
  • Solar filter can be removed for nighttime use of finder scope

122,00 EUR

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Orion - 70mm Multi-Use Finder Scope


  • Modular large aperture finder scope optical tube can be easily customized for your specific telescope aiming needs
  • Add preferred accessories to create your own specialized finder solution for your telescope
  • Multiple potential applications for both visual observing and astrophotography
  • Big 70mm fully coated lens provides bright, clear views
  • To reach focus, a 1.25" diagonal along with a 20mm or shorter focal length eyepiece, imaging camera, video camera, or autoguiding device is required (all accessories sold separately)

119,00 EUR

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Orion - Deluxe Mini 50mm Guide Scope with Helical Focuser


  • Compact Deluxe Mini Guide Scope with a built-in helical focuser for precise focusing of guide stars
  • Designed for use with the Orion StarShoot AutoGuider (sold separately), and astrophotography telescopes up to 1500mm focal length
  • Non-rotating camera collar will not cause the attached autoguider to rotate during focus adjustments, ensuring the field of potential guide stars will not move
  • Adjustable-aim dovetail guide scope bracket installs on virtually any astrophotography telescope quickly and easily
  • Very small and compact autoguiding system adds hardly any weight to an astrophotography setup and can conveniently be stashed in an accessory case between uses

190,00 EUR

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Orion - 60mm Multi-Use Guide Scope with Helical Focuser


  • Versatile 60mm aperture Guide Scope with a built-in helical focuser for precise focusing of potential guide stars
  • Designed for use with the Orion StarShoot AutoGuider or other similar small-chip CCD autoguiders
  • Helical focuser collar will not rotate attached autoguider devices during focus adjustments
  • Can also be used as a deluxe straight-through finder scope with optional 1.25" eyepieces installed (eyepieces sold separately)

242,00 EUR

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Orion - EZ Finder II


  • Simple, affordable, and effective red dot sighting device makes aiming your telescope a cinch!
  • A small red LED dot is projected onto a non-magnifying viewing window so you can aim the main telescope quickly and easily
  • Brightness of the red dot is adjustable to suit your preference
  • Thumbwheels allow positioning of the red dot horizontally and vertically for precise telescope alignment
  • Includes bracket that fits the dovetail mounting base on many Orion or Sky Watcher telescopes

44,00 EUR

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Orion - EZ Finder™ Deluxe II


  • The Orion EZ Finder Deluxe II is a non-magnifying reflex sight that makes aiming your telescope easier and more accurate than ever - day or night!
  • Finder projects a small red or green LED reticle pattern onto a viewing window so you can easily aim your telescope at night or during the day
  • EZ Finder Deluxe II features a large viewing window, four different aiming reticle patterns to choose from, and five brightness levels
  • Horizontal and vertical fine-adjustment set-screws allow precise alignment of the reflex sight with the telescope
  • Includes dovetail finder bracket that fits most Orion telescopes. Requires CR-2032 lithium button-cell battery (included)

89,00 EUR

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Celestron - StarPointer Pro


  • While a red dot can obstruct your desired target, the Celestron StarPointer Pro projects two circular LED reticles.
  • Just place your target inside the circles and it's ready to view in the eyepiece.
  • The circles also serve as a measuring tool while star-hopping.
  • For added convenience, the Celestron StarPointer Pro Scope offers a 40 mm optical window with a large field of view.
  • StarPointer Pro attaches quickly to any telescope and secures with a dovetail connection and finger knobs, no screwdriver needed!

42,00 EUR

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Celestron - Trekcel 3300


  • 2-in-1 device: portable power pack and powerful flashlight
  • 3300 mAh lithium battery charges smartphones, MP3 players, and other USB-powered devices
  • Bright 100 lumen LED flashlight with 4 modes: low light, bright light, flashing light, and SOS
  • Rugged, high quality aluminum bezel for outdoor use
  • Includes 7 adapters for use with a variety of devices

48,00 EUR

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NightstreakTM Green Laser Pointer


  • This handy 1mW laser device emits a powerful pencil beam of green light, tracing out a clear path in the night sky, enabling you to point out astronomical objects of interest to fellow observers.

69,00 EUR

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NightstreakTM Green Laser Pointer + Bracket


  • Use the Orion SkyLine Deluxe Green Laser Pointer as a convenient telescope aiming device with this complete package
  • Includes Orion SkyLine Green Laser Pointer, dovetail ABS bracket, and on/off collar
  • Lightweight ABS bracket features spring-loaded X-Y alignment for the inserted SkyLine Deluxe for easy calibration with your telescope
  • No more uncomfortable bending and peering through small finder scope lenses or reflex sight windows
  • CAUTION: Use the Skyline Deluxe Green Laser Pointer responsibly - Never aim it anywhere near people, moving vehicles, aircrafts, or windows and keep out of the hands of children


102,00 EUR

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Orion - Bracket for NightstreakTM Green Laser Pointer


Enables Use of Green Laser Pointer as a "Finder Scope"!

  • Mounting bracket for use of a SkyLine Green Laser Pointer (GLP) as a"finder scope"
  • Sturdy ABS bracket holds GLP and fits the dovetail finder scope base of most Orion telescopes
  • Makes pointing any telescope super easy. Laser beam shows exactly where your telescope is aimed
  • No need to crouch in odd positions as when peering through a standard finder scope!
  • Spring-loaded X-Y adjustment screws enable quick alignment of GLP with scope. GLP sold separately


33,00 EUR

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Orion - Dovetail Base for Finder Scope


  • Dovetail base fits any finder scope or reflex sight bracket so you can securely attach an aiming device to any telescope
  • Ideal for custom installation of any finder scope, EZ Finder reflex sight, and Green Laser Pointer bracket on any non-Orion telescope
  • Also useful for adding a second or third aiming device to your telescope
  • Aluminum base fits any diameter telescope tube, includes attachment hardware   

16,00 EUR

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In stock


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Orion - Dual Finder Scope Mounting Bracket


  • Attach two finder scopes or other aiming devices to your telescope quickly and easily
  • Use any combination of two aiming devices you wish including finder scope, red-dot reflex sights, green laser pointer brackets, mini guide scopes, and more
  • Allows use of two finders with no drilling required
  • Great for both visual observers and astrophotographers
  • You'll never go back to using just one finder scope again!

49,90 EUR

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Orion - Safety Film Solar Filter for 50 mm finders


  • Affordable film filter fits all 50mm finder scopes for safe solar aiming
  • Inside Diameter: 60 mm
  • Black-polymer filter material offers clear, high-contrast views of the Sun and sunspots
  • Displays the Sun in your finder scope in a natural, yellow-orange color
  • Stronger and more durable than thinner, flimsy film filters
  • Low-cost alternative to glass solar filters




26,00 EUR

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In stock



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OPTIEK VAN GROOTVEN B.V.B.A.
Opticien-Optometrist 
Kapellestraat 24
2630 Aartselaar - 03 887 73 93 of  0471 68 41 83
info@grootven.be
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