150mm telescope
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Celestron Omni XLT 150mm Telescope Newtonian Reflector 31057
Sale Price: $518.95  |
DescriptionCelestron Omni XLT 150mm Telescope Newtonian Reflector 31057 Features
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What is considered a "good focal length" for a reflector telescope?
What is considered a good focal length of a telescope reflector type? Do you have any connection with the optical diameter (ie 114mm/4.5 ", 130 mm / 5", 150 mm / 6 ") Example: (OPDia 114mm/4.5 "- focalLength 500mm/20") versus (OPDia 130 mm / 5 "- focalLength 1000mm/39) versus (OPDia 150 mm / 6" - focalLength 1400mm/55) Eye on equal terms with the Moon and Orion's belt as a reference ... it would be better? (I hope this is a question best summary.) I have only used once a refractor telescope, but I think I am because of the update .... therefore, the desire for a reflector. No replys are intelligent for many, you can let the public in general, to decide the best.
Personally, I like a focal length of 60 inches. It is time for you can achieve high power views without Barlows resorting to eye and extremely short focal length, and is short enough that you can get decent wide field views without resorting to extremely long focal length eyepieces. Dobson A type field with one inch focal length-60 put the eye in my eye level when the scope outlined in the zenith for what ever I have to use a ladder to reach the eyepiece. In fact, I can see most of the sky while sitting.
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 Celestron 6 150mm Dobsonion Reflector Telescope  US $139.00
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 Orion SkyQuest XT6 9806 150mm Newtonian Telescope US $54.50
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Celestron 21062 AstroMaster 70 EQ Refractor Telescope
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DescriptionCelestron’s AstroMaster 70 EQ combines the solid optical performance of a classic achromatic refractor with a German style equatorial mount. The Astromaster 70 features easy no-tool setup and much better optics than 60mm beginner scopes. The Astromaster package includes high and low power eyepieces, a correct image diagonal prism, illustrated instructions, and planetarium software for your PC. The AstroMaster 70 EQ features very good optical performance. Achromatic refractors have a two piece objective lens, the second lens element compensates for “chromatic aberration”, the false color or blue fringes seen in low cost telescopes. In daylight tests I see very little blue fringing with the standard equipment 10mm eyepiece (90X magnification), and none at all with the 20mm eyepiece (45X). Stars and planets show up very nicely with the AstroMaster 70. The bright double star Castor, one of the “twins” in the constellation Gemini, is cleanly split at 90X with the 10mm eyepiece. When I tried an optional 6mm Plossl eyepiece for a magnification of 150X, I was treated to lovely views of Saturn’s rings and the little orange disk of Mars. My view of the Moon was delightfully crisp and clear; the 20mm eyepiece nicely frames the Lunar disk, and using the 10mm eyepiece I could easily see mountain peaks and terraced walls inside the crater Copernicus. The AstroMaster 70 EQ also features a newly designed tripod with 1.25 inch stainless steel legs. This new tripod holds the telescope firmly; I had no trouble focusing even with a high power eyepiece. The equatorial mount is a little more complicated to balance and align than the AstroMaster 70 AZ , but the reward is better slow motion control and tracking at magnifications over 100X. Simply point the equatorial axis at Polaris, the North Star, and the telescope tracks celestial objects by turning one slow motion knob. This makes it much easier to use a high power eyepiece while viewing the Moon and Planets. The “star pointer” finder scope works by shining a red LED on a plastic window; just look through the window and line up the red spot with your target. This works OK for bright objects like the Moon and planets but not so well for finding galaxies and deep space objects. The AstroMaster 70 EQ is a very good entry level telescope for a student or family. The good quality 70mm optics produce an image that is significantly sharper and brighter than 60mm beginner scopes, and the AstroMaster 70 EQ includes a solid mount, two good eyepieces, and fully illustrated instructions. --Jeff Phillips Pros: Reliable refractor design Good views of the Moon and planets Complete accessory package Simple no tool setup Cons: Star-pointer not so easy to use Celestron AstroMaster 70EQ 45 - 90X Refractor Telescope with Equatorial Mount. Affordable, powerful, lightweight... the perfect choice for amateur astronomers and backyard stargazers! Proving once again that you don't need NASA's budget to see the stars. If you're aiming to get started in astronomy, the AstroMaster 70EQ's blend of quality optics, entry-level usability and affordable price is tough to beat. It's lightweight, easy to haul to the darker skies found outside city limits, and requires no tools to set up. For celestial and "earthbound" observation on a dime, the Celestron AstroMaster outshines the rest! Specifications: German Equatorial mount with setting circles to accurately locate and track sky objects; 70 mm aperture size; Includes 20 mm eyepiece for 45X magnification, 10 mm eyepiece for 90X; Refractor optical design; Fully-coated glass optics with high-transmission coatings for enhanced brightness and clarity; Built-in StarPointer red laser for easy targeting; Comes with The Sky X Planetarium software, featuring a 10,000 object database to get you started; Focal length: 900 mm; Focal ratio: 12.86; Limiting stellar magnitude: 11.7; Light-gathering power: 165X; Angular F.O.V.: 1.1 degrees; Linear F.O.V.: 58'; Optical tube length: 36"; 1.25" erect image diagonal; Weighs 18 lbs. Includes aluminum tripod with 1.25" steel tube legs. Order yours today! Celestron AstroMaster 70EQ 45-90X Refractor Telescope Features
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Barska BlackBlackhawk 20-60x60 Waterproof Straight Spotting Scope w/Tripod, Soft Carry Case & Premium Hard Case
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DescriptionThe Barska Blackhawk 60mm spotting scope is a terrific value because it offers very good optical performance in a compact and affordable package. The scope itself features waterproof design, multicoated optics, and a zoom eyepiece with magnification ranging from 20X up to 60X. The accessories include a light weight table-top tripod, a soft caring case, and a durable hard shell case that will allow the rubber armored scope to stand up to a lifetime of use. The Blackhawk 60mm spotting scope uses a multi-coated objective lens and rugged porro-prism design for bright, clear images. At 100 yards, I can clearly focus in on a target, even when I crank the magnification up to the maximum 60X. When I use the scope for wildlife spotting, the sweet spot seems to be about 30X magnification; 30X gives me an ideal combination of sharp images and a wide field of view, perfect for identifying Puffins and Pelicans along the coast. I also like the compact size and light weight of the Blackhawk 60. At only 14 inches long and weighing less than two pounds, the Blackhawk 60 is light enough to use a photo tripod such as the SLIK U-9000 in the field. Like other entry level spotting scopes, the Barska Blackhawk 60 uses an Achromatic objective lens, which means that some false color or blue fringing is noticeable at high power. I’ve been pleasantly surprised by the quality and value of the binoculars and spotting scopes imported by Barska the last few years. The Barska Blackhawk 60mm spotting scope simply offers very good optical performance for a very reasonable price. --Jeff Phillips Pros: Excellent price/performance ratio Very good Achromatic optics Waterproof design with rubber coating Premium hard shell case included Cons: Blue fringing noticeable at high power Limited eye relief for eyeglass wearers Barska 20 - 60x60 mm Waterproof Blackhawk Spotting Scope. Big name quality, big time VALUE! Cheap equipment just doesn't cut it. But the Barska Blackhawk 20-60x60 mm Spotting Scope gives you a great price on full-function features you'd normally pay BIG bucks to get. Engineered with unsurpassed optical performance and durability by those who understand the harsh hunting conditions scopes have to endure. Designed for the discriminating hunters who demand only the best, this Blackhawk is the best value in its class. Zoom in on the features: Big 60 mm objective increases light gathering ability for brighter images in low-light conditions; Multi-coated optics maximize light transmission for superior brightness and clarity; Powerful zoom provides 20-60x magnification; 91-45 ft F.O.V. @ 1,000 yds.... close focus: 23 ft; Complete waterproof protection is ideal for all-weather conditions; Long 18-15 mm eye relief and flip-down eyecups are perfect for glasses and non-glasses wearers alike; Glare-reducing sunshade included; Rubber armor designed to protect and absorb shock; Quality pan-head tripod; Premium hard carry case included, plus soft-side case; Approx. 15", 2 3/4 lb.; Spot your target without killing your budget. Order Today! Barska 20-60x60 mm Waterproof Blackhawk Spotting Scope Features
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Celestron 71020 SkyMaster 25-125x80 Zoom Binoculars
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DescriptionCelestron's SkyMaster Series of large aperture binoculars are a phenomenal value for high performance binoculars. Ideal for astronomical viewing or for terrestrial (land) use, especially over long distances. SkyMaster models feature high-quality BAK-4 prisms and multi-coated optics for enhanced contrast. Celestron has designed and engineered the larger SkyMaster models to meet the special demands of extended astronomical or terrestrial viewing sessions. Features
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Celestron Omni XLT 150mm Telescope Newtonian Reflector 31057
Sale Price: $518.95 |
DescriptionCelestron Omni XLT 150mm Telescope Newtonian Reflector 31057 Features
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Orion SkyQuest XT6i IntelliScope Dobsonian Telescope
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DescriptionThis remarkable scope combines powerful 150mm-diameter reflector optics with point-and-view simplicity in one nicely portable package. And with the included IntelliScope Computerized Object Locator, even the novice stargazer can pinpoint the location of 14,000+ celestial wonders stored in the IntelliScope's databank. It's like having your own personal tour guide to the universe! The optical tube rides on our state-of-the-art Dobsonian base, equipped with springless CorrecTension friction control for smooth movement and always-perfect tube balance. This telescope comes complete with a 1.25" rack-and-pinion focuser, two Sirius Plossl eyepieces, finder scope, eyepiece rack, nav knob, carrying handle, and snap-on dust cap. Features
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Celestron Advanced C6-SGT 11079-XLT 6"
Sale Price: $1,099.00 |
DescriptionCelestron Advanced C6-SGT 11079-XLT 6" Telescope Features
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Telescopic Engine Cylinder Inside Bore Gauge 0.315" (8mm) - 6" (150mm) 6pc Set
Sale Price: $23.99 |
DescriptionTool designed to transfer measurement width to micrometer or calipers Includes vinyl case Features
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Soundstream VIR7870NRB 7-Inch Flip Up TFT-LCD Receiver (Black)
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DescriptionSoundstream Single Din A/V Source Unit W/ 7 Flip-Up TFT-LCD Touch Screen And Bluetooth Connection Bluetooth & NA/Vigation Input Requires NA/Vibox-1 Features
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Celestron SkyMaster Giant 15x70 Binoculars with Tripod Adapter
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DescriptionBinoculars come in a wide range of shapes and sizes these days, and an even wider range of prices. It's easy to spend less than $100 or more than $500 for what may appear to be, at least outwardly, comparable models. While they may look the same, they are probably quite different on the inside. Recently, the binocular market has seen a flood of giant binoculars at prices that were unheard of just a few years ago. In general, giant binoculars are defined as those that magnify the view 10 times or more and have 70-mm or larger front (objective) lenses. It used to be that the least expensive giant binoculars cost in excess of $150, even $200. All that changed not long ago, when the bottom fell out of the price cellar. Now, several companies import giant binoculars that sell for half that, or less. Celestron's 15x70 SkyMaster binoculars are one of the leaders in the low-price giant binocular arena. They certainly sound good on paper. The SkyMasters include multicoated optics and BaK-4 internal prisms, two features that promise brighter, better images, and key points to look for when judging a pair of binoculars. They also come with an adapter for attaching them to a photo tripod, which is a must to use them to their fullest, and a soft carrying case. But just because they are cheap doesn't always mean they are worth the price. Would it be better to save up for a more expensive pair? To find the answer, I had an opportunity recently to judge the SkyMasters against a pair of Fujinon 16x70 FMT-SX binoculars , one of the finest pairs of giant binoculars sold today. Like the SkyMasters, the Fujinons feature BaK-4 prisms, but also have fully multicoated optics. As a general rule, superior coatings mean superior image sharpness and contrast. But then, that should be expected, given that the Fujinons cost many times more than the Celestrons. While the Fujinons were clearly the better performer, the Celestron SkyMasters held up admirably. Image brightness, quality, and contrast were all remarkable considering their bargain price. Although images were a little soft across the outer 25% of the Celestron's field, the overall view was impressive nonetheless. Some inexpensive binoculars have very sloppy focusing, causing the eyepieces to tilt and shift. Not so with the SkyMasters. I found that their center-focusing mechanism worked smoothly, with no apparently backlash or wobble. Eye relief (the distance you hold your eyes away from the eyepieces to see the full field) is stated to be 18 mm, a good distance for higher power binoculars and an important consideration if you must wear glasses when viewing. The SkyMasters are also light enough to support by hand for short periods of time, although buyers would be well advised to mount them on a sturdy photo tripod. The bottom line is, if you are considering a pair of giant binoculars, whether for bird watching, stargazing, or another recreational use, and have a limited budget, Celestron's giant 15x70 SkyMasters represent an excellent value. --Phil Harrington, author of Star Ware and Star Watch Pros: Exceptional value for the price Light enough to support by hand BaK-4 prisms Multicoated optics Cons: Outer 25% of the field is soft and a little blurry Requires a tripod to use for extended periods Celestron and ;s SkyMaster Series of large aperture binoculars are a phenomenal value for high performance binoculars ideal for astronomical viewing or for terrestrial (land) use - especially over long distances. Each SkyMaster model features high quality BAK-4 prisms and multi-coated optics for enhanced contrast. Celestron has designed and engineered the larger SkyMaster models to meet the special demands of extended astronomical or terrestrial viewing sessions. The 15x70 version is one of the most popular models in the series. It offers serious large aperture light gathering in an affordable and reasonably lightweight configuration. Features
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Sightmark 5x Tactical Reflex/Holographic Slide to Side Magnifier
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DescriptionThe Sightmark 5x tactical magnifier allows shooters to quickly acquire the target, and then move the magnifier out of the way without having to detach the unit. Inspired by military and law enforcement applications, the magnifier is designed for use in conjunction with holographic, collimated reflex, and other compatible weapons sights, giving the shooter the benefit of a reflex sight and scope in combination. The magnifier increases the magnification of the accompanying sight, boosting sighting range and improving target recognition--especially at medium range distances. The Sightmark 5x tactical magnifier can assist in quick target acquisition up to 350 yards and accurate target shooting at 150 yards. The magnifier also features extended eye relief for comfort, a wide field of view, and high-quality multicoated optics for improved visibility and clarity. The Sightmark 5x is compatible with most Picatinny and Weaver mounts, and is designed to work with EOTech, Aimpoint, Trijicon, and other brands. In addition, the magnifier's lightweight, waterproof, fogproof, and shatterproof frame provides durability in all elements. Specifications Magnification: 5x Objective: 29mm Eye relief: 53mm Field of view: 6 degrees Tube diameter: 30mm Material: Aluminum Color: Matte black Dimensions: 5.1 by 1.9 by 1.8 inches (W x H x D) Weight: 7.3 ounces Sightmark Tactical Magnifier, 5x, Slide-to-Side SM19025 Features
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