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Increased load capacity to 55 lb Heavy Duty belt-drive system minimizes backlash while providing smooth motor operation under heavy loads Spring-l...

The most compact and portable of Celestron’s German equatorial mounts offers the same rigidity as our larger mounts with minimal flexure and an im...

German Equatorial mount and tripod as supplied with all Omni XLT Series telescopes Includes RA and DEC slow motion controls and setting circles Tri...

Since its introduction in 2014, the Star Adventurer has been at the forefront of the lightweight, portable astroimaging revolution. And now, with ...

Il y a tant de plantes sauvages agréables à regarder, à sentir et à toucher au Québec.Ce livre te permettra d'en identifier 50 qui poussent en forê...

Identifier un arbre, le reconnaître par le nom propre à son espèce, voilà un vrai travail de détective! C'est une enquête minutieuse où chaque indi...

Objective Lens Effective Diameter: 25mm Magnification: 8x Relative Brightness: 9.6 Twilight Factor: 14.1 Eye Relief: 16.0mm Real Field...

A heavy-duty alt-azimuth mount for use with binoculars, spotting scopes or telescopes Adjustable aluminum legs provide a minimum height of 32” and...

Magnification 27 – 60 x Objective Lens Diameter 85 mm Linear Field of View 117 – 68 feet/1000 yards Angular Field of View 2.2 – 1.3 degree...

New ED doublet apochromatic optical design New lightweight, compact design perfect for wide field astrophotography New optical design featuring ou...

Doublet apochromatic optical design Two-element, air-spaced optical assembly minimizes false color 72mm aperture, 420mm focal length, f/5.8 focal ...

Of the more than 49,000 species of spider worldwide, some 4,000 are in North America. Spiders of North America explores more than 500 of the most c...

Model SV48P Optical Design Refractor Aperture 90mm Optic Coated FMC Objective Lens Doublet air-spaced achromatic design Focal Length 5...

Brand SVBONY Model SV550 Aperture 80mm Focal Length 480mm Focal Ratio f/6 ED Glass​ FPL51​ Telescope Type Refractor Resolution 1.4...

Product Name SVBONY SV503 102F7 ED Astronomy Telescope Type Refractor ED Glass S-FPL51 Coating SMC Aperture 102mm / 4.01-Inch Focal le...

Diameter: 80mm Ratio F : f/7 Focal: 560mm Doublet APO Comes with the bag and the handle

Diameter: 70mm Ratio F : f/6 Focal: 420mm Doublet APO Comes with the bag and the handle (bundle)

Accurate, reliable weather monitoring with real-time data updates every 2.5 seconds. Industry-leading transmission range of 1,000’/300 m from the ...

Magnification 8 to 16x Objective Lens Diameter 21 mm Angle of View 8x: 5° (Actual)16x: 3° (Actual) Field of View 16x: 157.5' @ 1000 yd / ...

The JS-18 HandHeld™ magnifier is a compact, easy to use 2x power magnifier for home, school or office. Its crystal clear acrylic lens gives you a s...

The MV-23, Magnivisor™ 2X Hands Free Head-Worn Magnifier is a hands free, head-worn 2x magnifier with a 3x flip-down lens. It comes with an adjusta...