spotting telescope
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20-150 x 50mm Compact Spotting Scope
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DescriptionCombines the functions of a spotting scope and a telescope. Enjoy 20X, 30X, 40X, 75X, 110X and 150X magnification with included eyepieces and accessories. Easy viewing with 12in. metal tabletop tripod. 50mm objective lens, 450mm focal length. Accessories include 6mm and 20mm eyepieces, diagonal mirror, Barlow lens, 1.5X erecting eyepiece and tripod. |
How Galileo’s Telescope Changed Astronomy
Before Galileo turned his telescope toward the night sky the act of astronomy was pretty much an astrological pursuit where objects and motions of object in the sky were explained using ancient and archaic understandings of the universe and how it works.
But he didn’t just observe and note new objects in the sky. He applied scientific methods, mathematical laws, and logical thinking to what he observed and it is this cross discipline approach that created the modern science of observational astronomy.
Galileo is often thought of as inventing the telescope. He didn’t invent the telescope but he was the first person to turn one toward the night sky. And the observations he made created the new science of modern astronomy where telescopes are used to help us understand our universe, our place in it, and how it works.
Galileo first heard about the mysterious telescope in 1609 and set out to make a copy for himself. This first telescope magnified images about three times. And over the course of a decade Galileo continued to make more telescopes and his most powerful one magnified images about ten times. This telescope enabled him to see things never before seen. And it enabled him to change our view of the universe and of the objects in the sky.
The first thing that Galileo turned his telescope to was the moon and by observing it over the course of many nights he made an important discovery. He saw that dark areas on the surface grew and shrunk depending on where the moon was in relation to the sun. From this he made the correct deduction that these dark areas were shadows cast by craters and mountains. He further explained with geometry that the height of the mountains and depth of the craters could be correctly calculated. This was an astonishingly important revelation in our view of the universe because it was previously believed that the moon was a smooth surfaced object.
Another extraordinary observation, and the most important, that Galileo made was the discovery of the four largest moons around Jupiter. They were previously unviewable but with his ten-power telescope he could see them. And after viewing them over the course of several nights he observed that they moved. With further careful observation and calculation he proved that they revolved around Jupiter. And this was a universe changing observation because it was previously believed that everything in the universe revolved around the Earth.
Galileo went on to make many telescopes and to make many other important observations in both the night and day sky including the discovery of spots on the sun and the discovery of the rings of Saturn. His observations in the sky spurred on many other telescope makers and astronomers to further explore the amazing and mysterious objects in the sky. But more importantly he also spurred on other astronomers to apply the laws and lessons of mathematics and logic to their observations in a quest to understand how the universe works.
This creation of the modern science of telescopic astronomy was clearly born in 1610 when he published his work called “Sidereus Nuncius” or the “Starry Messenger”. This work is still available to this day and is considered one of the most important written scientific works.
About the Author
The author has been an amateur astronomer for many decades. Learn more about telescopes and astronomy by visiting his website at:
The Joy of Telescopes and Astronomy
Why wouldn’t the hubble space telescope naturally stay pointed in the same direction?
Advanced technology is needed to keep a
telescope, travelling at almost 30 000 km/h
while orbiting Earth, aimed steadily at one
tiny spot for a long time. this is for grad 9 science
It depends on your frame of reference. Relative to the HST's own frame of reference, it IS always pointed the same direction. However, relative motion (or apparent relative motion) between HST and objects it is attempting to observe can be caused by various phenomenon, such as motion of the objects being observed, inertia of the HST, inertia of its fuel, solar wind, micrometeorites, drag, interstellar matter, etc.
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Go Diego, Go! Spotting Scopes 4ct
Sale Price: $6.66 |
DescriptionEvery adventurer needs a Go, Diego, Go! Spotting Scope. Each package includes 4 green and orange plastic mini telescopes with lens. Design features Diego and "Go, Diego, Go!" headline. These Spotting Scopes meet or exceed ASTM F963 safety requirements. Each scope measures 2 3/4" long and is great for party favors. WARNING: CHOKING HAZARD - Small parts. Not for children under 3 years. Features
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Bushnell Telescope Camera T-Adapter 1.25 inch
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DescriptionConnect your 35mm SLR Camera to any reflector or refractor telescope with a 1 1/4" accessory mount using this camera adapter. Turn your scope into a long lens for some real exciting close-ups! A T-Mount is required to connect your camera to this adapter |
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Celestron Photo / Video Tripod
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DescriptionThe Celestron 93606 photo / video tripod is designed specifically for Celestron spotting scopes but also works with a variety of photographic and video cameras. Adjustable legs and a swivel base help provide for precise and stable viewing. The Celestron® photo/video tripod is constructed with a central column with a geared elevator and adjustable tension and a 3-way panhead with a quick-release plate. It includes a horizontal and vertical bubble level and comes with a carrying case. Features
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Nikon 7072 Lens Pen Cleaning System
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DescriptionNew Nikon Lenspen Pro 7072 Cleaning System Lens Pen.Will not scratch or damage lens.Outperforms all other lens cleaning devices.Unique LensPen tip is self-replenishing.Cleaning compound will not spill or dry up. Features
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Nikon 8072 Microfiber Cleaning Cloth
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Features
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Tasco Essentials 8x21 Binocular (Black)
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DescriptionUltra-light binoculars offer outstanding compact performance with rugged, rubber armor ideal for hiking, backpacking or bicycling. Features fully coated optics for brightness, 8X magnification with 21mm objective lens, rubber fold-down eyecups for eye relief. Designed to fold down into itself to become even more compact. Includes carrying case. Limited lifetime warranty. Features
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BARSKA 3-9x32 Plinker-22 Riflescope
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DescriptionBarska 3 - 9x32 mm Plinker - 22 Illuminated Reticle Scope with Rings. Striking performance for your .22 and rimfire! Plinking or hunting, take aim with bright clear optics boasting the durability of scopes costing much more. Built to withstand the rough outdoors, the Plinker-22 Riflescope is waterproof, fogproof and shockproof. With fully coated optics, a 30/30 reticle, included 3/8" dovetail rings and scope caps, Plinker-22 is simply the best value you could aim for! All the details: Magnification: 3-9x; Objective lens: 32 mm; Waterproof / fogproof; 30/30 reticle; Exit pupil: 10.7-3.6; Fully coated optics; F.O.V.: 36' @ 100 yds. (3x); 13' @ 100 yds. (9x); Eye relief: 3 1/2"; Click value: 1/4"; Side adjustment windage and elevation; 1" tube diameter; Black matte finish; 11 1/2 ozs.; 12"l.; Mounting rings, lens covers and lens cloth included; Limited lifetime warranty.; Order yours today! WARNING: This item cannot be shipped to Canada. Please check your State, County and City laws for restrictions before ordering this product. Barska 3-9x32 mm Plinker-22 Illuminated Reticle Scope with Rings Adjustment knobs offer solid, satisfying 0.25-inch click adjustments, and the shooter can fine-tune for windage and elevation. The Plinker-22 is one of BARSKA's most popular riflescopes, and is engineered specifically for use with .22 rifles and rimfires. Designed for plinking and general hunting applications, this scope offers bright, sharp optical clarity, longterm durability, and 0.375-inch dovetail rings as an added bonus. Built to withstand the rugged outdoor conditions most hunters face, its casing is 100% water-, fog-, and shock-proof. Features Designed specifically for use with .22 rifles Water-, fog-, and shock-proof Fully multicoated optics Adjustable for windage and elevation Parallax-free at 50 yards Black matte finish 0.375-inch dovetail rings Includes mounting rings, lens covers, and lens cloth Specifications 3-to-9X magnification 12-inch tube length One-inch tube diameter 32-millimeter objective lens 30/30 reticle 10.7-3.6-millimeter exit pupil 3.5-inch eye relief 36-foot field of view at 100 yards at 3X magnification 13-foot field of view at 100 yards at 9X magnification 0.25-inch click value 11.5-ounce weight Warranty This BARSKA optical product includes a limited lifetime manufacturer's warranty against defects in materials and workmanship. About BARSKA BARSKA is a worldwide optics company offering an extensive line of precision sport and scientific products including binoculars, riflescopes, spotting scopes, telescopes, and microscopes. The company's product lines are designed and built with the latest optical technology, allowing users to enjoy beloved outdoor activities even more, and achieve exacting results when studying objects large and small. Features
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Bushnell PowerView 20x50 Super High-Powered Surveillance Binoculars
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DescriptionSuper high-powered surveillance binoculars for long-range detailed viewing. Great durability and performance in an attractive ?traditional? porro prism design. Non-slip rubber armor absorbs shock while providing a firm grip. Contemporary styling; includes neck strap and carrying case. Limited lifetime warranty. Bushnell PowerView binoculars offer the best of both worlds, combining contemporary styling and design with traditional Bushnell quality and durability. This particular PowerView binocular offers a 20x magnification--among the most powerful in its class--and a 50mm objective diameter. The multicoated optics, meanwhile, guarantee superior light transmission and brightness, helping you see just about any target, whether you're searching for birds or trying to get a better view of the football field. And users will love the patented InstaFocus focusing system, which holds your subject in sharp focus with a touch of the fingertip. Additional features include a porro prism system, a nonslip rubber armor housing that absorbs shock while providing a firm grip, a neck strap, and 9mm of eye relief. Specifications: Magnification: 20x Objective lens diameter: 50mm Size class: Standard Focus system: InstaFocus Prism system: Porro Prism glass: BK-7 Lens coating: Multi Field of view @ 1,000 yards: 170 feet Close focus distance: 45 feet Exit pupil: 2.5mm Eye relief: 9mm Eyecups: Fold down Waterproof/fogproof: No Adapts to tripod: Yes Weight: 30 ounces Warranty: Limited lifetime Features
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20-150 x 50mm Compact Spotting Scope
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DescriptionCombines the functions of a spotting scope and a telescope. Enjoy 20X, 30X, 40X, 75X, 110X and 150X magnification with included eyepieces and accessories. Easy viewing with 12in. metal tabletop tripod. 50mm objective lens, 450mm focal length. Accessories include 6mm and 20mm eyepieces, diagonal mirror, Barlow lens, 1.5X erecting eyepiece and tripod. |
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30 x 50 Spotting Scope Kit
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DescriptionHigh powered spotting scope with tripod features a large 50mm diameter front lens. High 30 x 50 magnification and outstanding light gathering transmission properties permit viewer to see highly detailed resolutions. Compact, lightweight design is ideal for travel or field use. 9 1/4in. long, 16 ounce water resistant body. Multicoated lenses. 3 year limited warranty. |
