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Helios - Stellar-II

Helios - Apollo HD

Helios - Quantum

Accessoires - Giant

Helios - Stellar-II

High quality waterproof, nitrogen filled observation binoculars, with individual eyepiece (IF)  focusing, designed for medium-to-long-range terrestrial and astronomical observations. Shockproof design incorporating a robust but lightweight magnesium alloy body construction.  The optical system features high-transmission lens and prism coatings allowing 85% light transmission. Eyepiece design features oversized elements, generous 20mm eye-relief and fold-down rubber eyecups for spectacle-wearers. Features integral tripod mounting bush and black rubber and supplied in soft storage/carrying case with padded neck strap, eyepiece rainguard and captive objective lens caps. 

Afbeelding Type Prijs


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Helios - Stellar-II 7x50 Waterproof Observation Binocular


  • Vergroting: 7x 
  • Objectiefdiameter: 50mm
  • Gezichtsveld: 7.2° of 126m/1000m
  • Lichttransmissie: 85%
  • Interpupilaire afstand: 56 tot 74 mm 
  • Eye Relief: 20 mm
  • Gewicht:  1150 g
  • Afmetingen: 192 x 202 x66 mm
  • Draagtas

195,00 EUR

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Helios - Stellar-II 10x50 Waterproof Observation Binocular


  • Vergroting: 10x 
  • Objectiefdiameter:  50mm 
  • Gezichtsveld:  6.5° of 114m/1000m
  • Lichttransmissie: 85% 
  • Interpupilaire afstand: 56 tot 74 mm 
  • Eye Relief: 20 mm
  • Gewicht: 1150 g.
  • Afmetingen: 185 x 202 x 66 mm 
  • Draagtas

195,00 EUR

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Helios - Stellar-II 10.5x70 Waterproof Observation Binocular


  • Vergroting: 10.5 x
  • Objectiefdiameter: 70mm 
  • Gezichtsveld:  4.5° of 84m/1000m.
  • Lichttransmissie 85%
  • Interpupilaire afstand: 58 tot 74 m 
  • Afmetingen: 290 x 220 x88 mm
  • Gewicht:  1750 gr.
  • Draagtas

260,00 EUR

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Helios - Stellar-II 15x70 Waterproof Observation Binocular


  • Vergroting: 15 x
  • Objectiefdiameter: 70mm 
  • Gezichtsveld:  4.4° of 77m/1000m.
  • Lichttransmissie 85%
  • Interpupilaire afstand: 58 tot 74 mm 
  • Afmetingen: 286 x 220 x 85 mm
  • Gewicht:  1750 gr.
  • Draagtas

260,00 EUR

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Helios - Apollo HD

Top quality waterproof , nitrogen filled observation binoculars, with individual eyepiece (IF)  focusing, designed for medium-to-long-range terrestrial and astronomical observations. Robust design incorporating an all-metal body construction. Features BAK-4 prisms and a fully broadband multi-coated optical system. The high-resolution optical system features high-transmission lens and prism coatings allowing a massive 92% light transmission, producing a flat field and bright distortion-free images. Exotic eyepiece design featuring oversized elements and long eye-relief and fold-down rubber eyecups for spectacle-wearers. Features integral tripod mounting bush and threaded eyepiece units to accept standard 1.25” astronomical light-filters. Finished in stylish Black Rubber and supplied in foam-lined Aluminium storage/carrying case. 


Afbeelding Type Prijs


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Helios - Apollo 10.5X70HR


  • Vergroting 10.5X
  • Objectiefdiameter: 70mm Hi-Resolution
  • Gezichtsveld: 5°
  • WF Flat-Field 68° oculairen 
  • Lichttransmissie: 92% 
  • Gewicht:  2.5 kg.
  • BAK4-prisma's, alle optiek behandeld met Di-Electric coatings
  • Gasgevuld
  • Statiefvoorziening en aluminium koffer

460,00 EUR

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Helios - Apollo 15X70HD


  • Vergroting 15X
  • Objectiefdiameter: 70mm
  • Gezichtsveld: 4°
  • WF Flat-Field 68° oculairen 
  • Lichttransmissie: 92%
  • Gewicht:  2.5 kg.
  • BAK4-prisma's, alle optiek behandeld met Di-Electric coatings
  • Gasgevuld
  • Statiefvoorziening en aluminium koffer


420,00 EUR

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Helios - Apollo 15X85HR


  • Vergroting 15X
  • Objectiefdiameter: 85mm Hi-Resolution
  • Gezichtsveld: 3.5° 
  • WF Flat-Field 68°oculairen 
  • Lichttransmissie: 92%
  • Gewicht:  4.8 kg.
  • BAK4-prisma's, alle optiek behandeld met Di-Electric coatings
  • Gasgevuld
  • Statiefbevestiging en aluminium koffer

589,00 EUR

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Helios - Apollo 20X110HR


  • Vergroting 20X
  • Objectiefdiameter:  110mm Hi Resolution
  • Gezichtsveld: 2.7° 
  • WF  Flat-Field 68° oculairen
  • Lichttransmissie: 92%
  • Gewicht:  7.1 kg.
  • BAK4-prisma's, alle optiek behandeld met Di-Electric coatings
  • Gasgevuld
  • Statiefbevestiging en aluminium koffer 

670,00 EUR

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Helios - Apollo 28X110HD


  • Vergroting 28X
  • Objectiefdiameter:  100mm
  • Gezichtsveld: 2.3°
  • WF  Flat-Field 68° oculairen
  • Lichttransmissie: 92%
  • Gewicht:  7.1 kg.
  • BAK4-prisma's, alle optiek behandeld met Di-Electric coatings
  • Gasgevuld
  • Statiefbevestiging en aluminium koffer

729,00 EUR

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Helios - Quantum

Afbeelding Type Prijs


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Helios - Quantum-7.4 / 25 x 100 Semi-Apo Triplet Observing Binocular


Superb award winning waterproof, nitrogen filled giant observation binocular with individual helical eyepiece focusing, designed for medium to long range terrestrial and astronomical observations. Incorporating oversized BAK-4 prisms and a fully broadband multi-coated optical system to ensure class leading optical performance. Premium quality triplet objective lenses provide semi-apochromatic optical performance reducing abberations for crisp high contrast views day and night. Eyepieces are angled at 45°, offering excellent versatility and viewing comfort for both terrestrial and astronomical viewing.

Features include built-in lens hoods, finderscope shoe and carrying handle. High quality precision all-metal construction. Supplied with a quality hardwood tripod and heavy duty fork mount which is specially designed for astronomical use, allowing the binocular to be angled upwards for use at high altitudes approaching the zenith., the binocular is provided with a quality foam lined storage case.

  • Vergroting 25 X
  • Diameter triplet-objectief: 100 mm, top quality objective lens
  • Beeldveld: 2.53°
  • Individueel scherpstelling van de oculairen
  • BAK-4 prisma's met vergroot oppervlak, fully multi-coated (breedband).
  • Triplet-objectieflenzen, semi-apochromatisch ! 
  • 45° inkijk.
  • Vorkmontering en zeer stevig statief in hardhout.
  • Geleverd in een stevige draagtas op wieltjes. 
  • Minimum scherpstel-afstand: 30 m
  • Gewicht: 13 kg. + 7.1 kg (statief)


    The overall finish of the Quantum-7.4’s seemed to be of a better standard, with all surfaces exuding quality….A hardwood tripod and U-fork mount, which did the job perfectly, made observations at the zenith very comfortable, with the 45° angled view….There wasn’t as much trailing off of image quality towards the edges….Stars really filled the field of view and we felt like we were falling through the sky. This was matched by views of the Moon that were incredibly detailed….Visually the Quantum-7.4’s seemed to have the edge on all the others….The sky background appeared to be the darkest of the four on test, with better contrast, so deep-sky objects like faint nebulae stood out slightly better. Indeed the nebula M17 displayed a mottled surface and was a wonderful smudge in the sky….They were a real delight to use”
    BBC Sky At Night Magazine


1.899,00 EUR

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Accessoires - Giant

Afbeelding Type Prijs


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Orion - Monster Parallellogram Binocular Mount


  • This big binocular mount provides stable support and precise aiming control for heavy astronomy binoculars
  • Capable of supporting binoculars weighing up to 8 kg. with up to 100 mm-diameter objective lenses
  • Parallelogram design lets you raise and lower attached binoculars without disrupting the aim for crowd-pleasing performance
  • Six degrees of motion make it easy to balance, aim, and view through big binoculars
  • Allows you to position attached binoculars as high as 180 cm

550,00 EUR

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Orion - Binocular Astronomy Field Guide


  • This complete observing guide is the perfect companion for any astronomy binocular
  • 16-page guide packed with gorgeous illustrations, correct-image maps of the Moon, Milky Way, constellations, and close-up maps of specific lunar regions
  • Designed for year-round use with seasonal star maps for both Northern and Southern hemispheres
  • Convenient field-of-view images of the most popular deep-space targets make it easy to hunt down elusive objects in the night sky
  • Printed on durable, water-resistant synthetic paper. Measures 26.8" x 19.3" (68cm x 49cm) and folds up to 6.7" x 9.6" (17cm x 24.5cm)


14,00 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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