Iii Nebula Filter
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Celestron 93624 Narrowband Oxygen III 2 Filter
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DescriptionThe Celestron 93624 Narrowband Oxygen III 2-inch filter is a remarkable advance for the serious visual observer of emission nebulae. One of the biggest advantages of narrowband filters is that by passing only the light emitted by nebulae, light from artificial sources like street lights is blocked. This allows you to take detailed exposures of nebulas from a suburban location that can rival shots from much darker sites. The Celestron 93624 is made of high quality, solid plane parallel glass. The OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light. The result is extreme contrast between the black sky background and the faint photons of OIII light needed for detailed views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae, among other objects. Each filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400 to 700 nm. This eliminates the un-natural colored halos surrounding bright stars common with O III filters of less sophisticated coating technology. Features
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What are some easy deep space objects for a beginning astronomer?
I have a 4-inch Mak/Cass and I have been trying to observe deep space objects but have had little success other than the Orion Nebula. I have a O-III filter as well as a range of eyepieces and color filters. I've been able to observe the planets easily, any suggestions?
Observing the objects in Charles Messier's catalog is a great project for anyone interested in deep sky objects. His catalog includes the best and brightest deep sky objects. Stay away from the galaxies unless you have a good dark sky; concentrate on the star clusters, open and globular. A 4-inch aperture won't show you a lot of detail in globulars, but will give you fine views of open clusters, such as M35 in Gemini and the open clusters in Auriga, all well placed right now.
An O-III filter is really not suitable for any scope less than about 8" aperture because it cuts out so much light. Colour filters also don't help with deep sky objects. Getting away from light polluted skies is the most important thing you must do in order to get pleasing views of deep sky objects.
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Celestron 93624 Narrowband Oxygen III 2 Filter
List Price: |
DescriptionThe OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light. The result is extreme contrast between the black sky background and the faint photons of OIII light needed for detailed views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae, among other objects. Each filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400 to 700 nm. This eliminates the un-natural colored halos surrounding bright stars common with O III filters of less sophisticated coating technology. The Celestron 93624 Narrowband Oxygen III 2-inch filter is a remarkable advance for the serious visual observer of emission nebulae. One of the biggest advantages of narrowband filters is that by passing only the light emitted by nebulae, light from artificial sources like street lights is blocked. This allows you to take detailed exposures of nebulas from a suburban location that can rival shots from much darker sites. The Celestron 93624 is made of high quality, solid plane parallel glass. Features
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2" Orion Oxygen-III Nebula Eyepiece Filter
Sale Price: $155.99 |
DescriptionYou can't turn up the luminosity on nebulas, but you can crank up the contrast between them and the sky to reveal more of their wondrous detail. Our Oxygen-III filter provides extremely selective filtration to bring out elusive detail in diffuse and planetary nebulas. It does so by transmitting close to 90% of the light corresponding to the two oxygen-III spectral lines at 496nm and 501nm while completely blocking virtually all other wavelengths. The results are remarkable. You'll see more detail than you ever could before in nebular gems such as the Swan, Ring, Dumbbell, Helix, and Eagle, to name a few. The O-III provides an even greater contrast boost on some objects than the UltraBlock narrowband filter. And for nebulas, every little bit helps! Try the O-III with a low-power 2" eyepiece and take in the whole Veil Nebula. Wow! Features
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Celestron 93623 Narrowband Oxygen III 1.25 Filter
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DescriptionThe OIII narrowband filter isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) emitted by planetary and emission nebulae, while blocking the rest of the overall spectrum of light. The result is extreme contrast between the black sky background and the faint photons of OIII light needed for detailed views of the Veil, Ring, Dumbbell, Crescent and Orion nebulae, among other objects. Each filter has an ultra hard, vacuum-deposited coating carefully designed to block all of the visual spectrum ranging from 400 to 700 nm. This eliminates the un-natural colored halos surrounding bright stars common with O III filters of less sophisticated coating technology. The Celestron 93623 Narrowband Oxygen III 1.25-inch filter is a remarkable advance for the serious visual observer of emission nebulae. One of the biggest advantages of narrowband filters is that by passing only the light emitted by nebulae, light from artificial sources like street lights is blocked. This allows you to take detailed exposures of nebulas from a suburban location that can rival shots from much darker sites. The Celestron 93623 is made of high quality, solid plane parallel glass. Features
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Orion SpaceProbe 3 Altazimuth Reflector Telescope
Sale Price: $99.99 |
DescriptionOrion's surprising little Spaceprobe 3 has been picked by independent reviewers as one of the best telescopes in its price class. Unlike similar telescopes seen in discount stores, Orion has refined the Spaceprobe 3 by paying attention to the little details, and that make this telescope a great value. The Spaceprobe 3 comes with an unusually complete set of accessories. The package includes two very good Explorer II eyepieces (25mm and 10mm), an adjustable altazimuth tripod, a good red-dot finder, a student edition of "The Sky" planetarium program, and a well written manual. The package even includes the tools you'll need to assemble the telescope and align the optics. The Spaceprobe 3 is a Newtonian reflector. That means it uses mirrors instead of lenses. Newtonians are primarily used for astronomy because the images are upside-down. Orion includes a collimation tool and good directions for aligning the mirrors. The reward for aligning the mirrors is seen in images that snap into sharp focus. My Spaceprobe 3 arrived properly aligned right out of the box. With its Explorer II eyepieces, this telescope consistently delivers fine views. Using the 25mm eyepiece (28x magnification) the Pleiades cluster is simply wonderful, showing dozens of stars. From a rural location with a dark sky, the Orion Nebula is a big ghostly glow, and when I zoom in with the 10mm eyepiece, the Trapezium resolves into four tiny pinpoints. The double star Gamma Andromeda becomes two beads of light, one gold, the other one pale blue. Moon and planet images are crisp, with none of the false color I see in low cost refractors. When I look at the Moon I see mountains and terraced walls inside the larger craters. With the 10mm eyepiece (about 70x), Saturn's rings are sharply separated from the planet, and I can even pick out the planet's shadow on the rings. The Altazimuth mount included with this telescope is light and easy to use; it may be the best choice for a young astronomer. If you want motorized tracking of the stars and planets, Orion's Spaceprobe 3 EQ is available with an equatorial mount, and Celestron sells essentially the same optical system with the computerized NexStar 76GT. -Jeff Phillips Pros: Best in class optical performance Two good Explorer II eyepieces Complete accessory package Cons: Small 76mm aperture Upside-down terrestrial images If you're looking for an affordable entry-level telescope for that beginning astronomy enthusiast, our SpaceProbe 3 Altaz is the perfect choice. Great for all-around stargazing, this highly portable, uncomplicated scope is just the right size and weight for the entire family, and just the right price for parents. This is a quality telescope, with a 3" (76mm) glass primary mirror mounted in a sturdy Neptune Blue Metallic aluminum tube. The rack-and-pinion focuser accepts standard 1.25" eyepieces. Two Explorer II eyepieces, a low-power 25mm (28x) and a high-power 10mm (70x), are included. An EZ Finder II finder scope mounted on the tube helps zero-in on the sky target. The altazimuth mount is lightweight and easy to use. To aim it, simply move it up or down or left or right. An adjustable, aluminum tripod with accessory tray is also included. One-year limited warranty. Features
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Green Baytronix FirstView 3" Altazimuth Mount Reflector Astronomy Telescope
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DescriptionHere is really the perfect telescope for kids who are ready to explore the depths of space. This 3" telescope is big enough to give you great views, yet still lightweight and manageable enough for most kids to handle. Your youngster will enjoy many nights under the stars gazing at the planets, moon and heavens. With a large 76mm (3 inch) primary mirror, this reflector telescope is ideal for backyard astronomy and is a great introductory telescope for learning all about astronomy. With this three inch telescope, you can see tremendous detail when viewing the moon. With planets you can see the Rings of Saturn and the Moons of Jupiter. In dark skies you can see distant nebulae and galaxies as well. This telescope comes with 3 eyepieces with storage containers, and a Barlow 2x lens. That gives you six different magnification options. With the Barlow, you can achieve up to 350x magnification of distant objects. Plus, this telescope is compatible with two sizes of eyepieces -- the .965" diameter eyepieces that are included and the larger 1.25" eyepieces (so you can upgrade your view when you're ready!) Your telescope also comes with a dust-free cleaning cloth, a great map of the surface of the moon and a moon filter designed for reducing moon glare and making surface details more clear, and a poster of the solar system. The aluminum tripod is fully adjustable and allows even taller people to observe the stars without having to crouch down in an uncomfortable position. A handy accessory tray on the tripod makes it easy to keep track of extra eyepieces. With the altazimuth mounting, the telescope is designed for beginners and children. There is nothing to it. This is a true "point-and-shoot" telescope. The mount makes it simple to aim and move the telescope, you don't need to learn about complex Polar Alignment or stellar coordinates -- just aim the telescope at what you want to see and have a look. Features
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Orion SkyQuest XT8 Classic Dobsonian Telescope Plus 3 Free A
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DescriptionOur classic XT8 isn't just great bang for the buck, it's a veritable explosion of telescope value. It combines powerful parabolic optics with the ultimate in mechanical stability. And now, for a limited time, buy the SkyQuest XT8 Classic Dobsonian, and receive three free accessories (a DeepMap Folding Star Chart, a 1.25" moon filter, and our Lasermate Collimator) at no additional charge! The SkyQuest XT8 features an 8" parabolic primary mirror that will tease out detail in nebulas, resolve stars in globular clusters, and reveal subtle structure in galaxies. The enameled steel optical tube sports a 2" aluminum rack-and-pinion focuser that accepts both 2" and 1.25" eyepieces. The tube moves effortlessly on Teflon/UHMW bearings for point-and-view simplicity. Comes complete with navigation knob, 6x30 finder scope, two 1.25" Sirius Plossl eyepieces, eyepiece rack, collimation cap, and hard dust cap. Features
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