Don't miss a thing.  Sign up for News, Updates, Discounts & Private Sales!  It's Free.

Astronomy Software
Telescopes
Telescope Accessories
Binoculars
How To Select A Telescope
Astronomy Technical Papers
Contact Nightfire Scientific





You can now search our entire list of nearly 2,000 products. Go to our new Astronomy Equipment Search Page.



ED Refractor

Extra Low Dispersion Telescopes



Orion 80mm ED Apochromatic Refractor Telescope

Your Price:  $499.95

Orion 80mm ED Apochromatic Refractor Telescope

We love those premium "apo" refractors as much as the next guy. We just don't think you should have to work a second job or put the family heirlooms on eBay to own one. Now you won't, thanks to our amazingly affordable 80mm ED refractor. Its multi-coated 80mm objective doublet contains one element crafted from extra-low-dispersion FPL-53 glass. Images are virtually free of chromatic aberration! With a focal length of 600mm (f/7.5), the "ED80" is wonderfully suited for visual applications on both solar system and deep-sky objects as well as for prime-focus astrophotography and CCD imaging. Sold as optical tube assembly only, without accessories. Finished in gunmetal gray metallic enamel. Compatible tube rings are #7371, sold separately. One-year limited warranty.





Orion 72mm EON ED SCOPE - Powerful and Portable!

Meade Series 5000 ED APO 3.1

Your Price: $649

Meade Series 5000 ED APO 3.1"/80mm f/6.0 Telescope OTA w/ 2" Diagonal

Meade Series 5000 ED APO 3.1"/80mm Apochromatic Refractor Telescope Optical Tube Assembly (480mm f/6.0) with 2" 90-Degree Mirror Diagonal - Requires Mount and Eyepiece for Observing 03060002 Telescope Optical Tube Assemblies Series 5000 ED APO 3.1"/80mm f/6.0 Telescope OTA w/ 2" Diagonal






Orion EON 80mm ED Apochromatic Refractor

Your Price:  $699.95

Orion EON 80mm ED Apochromatic Refractor

The EON 80ED is an imager's dream scope. The 500mm focal length yields an f-ratio of 6.25. So the EON 80ED gives you brighter images, a wider field of view, and allows shorter exposures of deep-sky objects. The 80mm air-spaced doublet lens is crafted with one element of FPL-53 extra-low dispersion, "ED", optical glass, which virtually eliminates the effects of chromatic aberration. All air-to-glass lens surfaces are fully multi-coated for maximum light throughput. Baffles inside the optical tube, glare threads in the focuser drawtube, and a retracting lens shade/dew shield eliminate unwanted glare to deliver crisp, high-contrast images. Like all EON instruments, the 80ED has a beautifully machined and rotatable Crayford-type 2" focuser with a removable 1.25" insert. The gearless Crayford design provides smooth, zero image-shift focusing. The dual-speed focusing knobs have an 11:1 micro-focusing ratio. A dovetail finder scope base comes standard and accommodates any Orion finder scope or EZ Finder. The telescope has an integrated L-shaped mounting base that fits the dovetail saddle of Orion telescope mounts. The base also has ¼"-20 threaded holes to allow attachment to a sturdy field tripod for terrestrial use. Weighs 6 lbs., 8 oz. One-year limited warranty.





Orion SkyView Pro 80mm ED Equatorial Refractor Telescope

Your Price:  $749.95

Orion SkyView Pro 80mm ED Equatorial Refractor Telescope

Now you can get our premium 80mm ED refractor in a complete equatorial package. The SkyView Pro 80ED combines the best value in high-end refractors today with the stability and precision of our SkyView Pro equatorial mount for one very attractive price. The ED80's stunningly clean, pinpoint star images and lack of color fringing around bright objects has observing purists doing double-takes. The SkyView Pro mount provides a fitting complement to the great optics for deep-sky or high-power planetary study. The setup is nicely portable, and the optics cool down in no time so you can carry the scope outdoors for a quick look around practically on a whim. Where else can you find such an impressive apochromatic refractor package for so affordable a price? You can't. So get the SVP 80ED EQ and enjoy the spectacular view!





Orion SkyView Pro 80ED GoTo Apochromatic Refractor Telescope

Your Price:  $1,249.95

Orion SkyView Pro 80ED GoTo Apochromatic Refractor Telescope

We've added GoTo computerized control to our premium 80mm ED refractor so finding your targets is a snap. The SkyView Pro 80ED combines the best value in high-end refractors today with the stability and precision of our SkyView Pro equatorial mount and GoTo control for one very attractive price. The 600mm (f/7.5) optical system provides sharp resolution and a wide field of view, both great for film or digital imaging. Its fully multi-coated objective doublet, with one element crafted from FPL-53 extra-low dispersion "ED" optical glass, provides images that are strikingly sharp and free of chromatic aberration. We've outfitted the SVP 80ED's 2" Crayford-type focuser with a 2" mirror star diagonal. It accommodates 2" or 1.25" eyepieces, and we include two 1.25" Sirius Plossls plus an 8x40 finder scope.





Orion SkyView Pro 100ED GoTo Refractor Telescope

Your Price:  $1,649.95

Orion SkyView Pro 100ED GoTo Refractor Telescope

The Orion SkyView Pro 100mm ED GoTo apochromatic refractor is a complete equatorial observing package featuring the ED100 apochromatic refractor optical tube assembly paired with the venerable SkyView Pro equatorial mount/tripod, now with GoTo computerized control -- at an unprecedented low price. The "ED100" delivers images remarkably free of chromatic aberration, thanks to its fully multi-coated 100mm objective doublet. It's crafted with one element of FPL-53 extra-low dispersion "ED" optical glass from Japan. The 100mm aperture gives it 56% greater light grasp than our ED80. And the 900mm focal length (f/9.0) excels at visual planetary and lunar study and imaging work as well. The new GoTo hand controller powers the optical system to any of 13,400+ celestial targets in the GoTo database. Bright ED optics, rock-solid mount and GoTo computerized control. This scope packs a lot of performance for the price!





Celestron Omni XLT 102mm ED Telescope

Your Price:  $899

Celestron Omni XLT 102mm ED Telescope

The new Omni XLT series features the new Omni CG-4 heavy-duty German Equatorial mount and sturdy tripod featuring 1.75" stainless steel legs and center tray for superior rigidity and vibration dampening. Using aspheric shaping technology in conjunction with hand-figuring the optics the Omni XLT presents an image with virtually no spherical aberration. We also added our famous StarBright XLT coating system to further enhance light transmission. This telescope features high quality optics, starting with each lens or mirror being hand selected so only the finest grade optical glass is used. Starbright XLT coatings provide maximized light transmission. This product is shipped with one 25 mm multi-coated eyepiece with 20mm eye relief and a 50 degree field of view. A 1.25" star diagonal is included. The mount is a CG-4 German Equatorial mount with setting circles and slow motion controls to accurately locate and track sky objects. Both axis of the mount are designed with ball bearings to provide smooth performance. The tripod is heavy-duty stainless steel, shipped pre-assembled. It includes an accessory tray and a built-in bubble level. The telescope set-up is easy, requiring no tools. The Omni XLT includes "The Sky" Level 1 planetarium software with a 10,000 object database and enhanced images. Two year warranty





Orion Premium 102mm F/7 ED Refractor

Your Price:  $899.95

Orion Premium 102mm F/7 ED Refractor

Our newest "ED" refractor was designed with the astro-imager in mind. Outstanding 102mm optics, heavy-duty Crayford-style focuser, and superb fit and finish combine to set a new standard for quality and performance. The Premium 102mm ED has a 714mm focal length and a moderately fast focal ratio of f/7.0, delivering higher magnification and bright, high-contrast images with modest exposure times. Its fully multicoated, air-spaced 102mm doublet objective has one element made from extra-low dispersion (ED) optical glass for shade. The machined aluminum 2" Crayford-style focuser provides ultra-smooth dual speed focusing. It handles heavy cameras and accessories and rotates for optimal camera positioning. Includes metal tube rings and an 8" long dovetail mounting plate for attachment to most Orion EQ mounts. Also includes dovetail base 7214 for an Orion finder scope (finder scope not included).





Orion SkyView Pro 100mm ED EQ Apochromatic Refractor Telescope

Your Price:  $1,149.95

Orion SkyView Pro 100mm ED EQ Apochromatic Refractor Telescope

The refractor revolution continues at Orion with the SkyView Pro 100mm ED. It's a complete observing package featuring the ED100mm apochromatic refractor optical tube assembly paired with the venerable SkyView Pro equatorial mount/tripod -- at an unprecedented low price. The "ED100" delivers images remarkably free of chromatic aberration, thanks to its fully multi-coated 100mm objective doublet. It's crafted with one element of FPL-53 extra-low dispersion "ED" optical glass from Japan. The 100mm aperture gives it 56% greater light grasp than our ED80. And the 900mm focal length (f/9.0) is ideal for visual planetary and lunar study and excels for imaging work as well. This package includes a host of fine accessories: 2" mirror diagonal (with 1.25" insert), two Sirius Plossl eyepieces (1.25"), 6x30 finder scope, tube rings and mounting plate.





Celestron Omni XLT 102 ED 4.0

Your Price: $1,429.95

Celestron Omni XLT 102 ED 4.0"/102mm Refractor Telescope Kit

Celestron Omni XLT 102 ED 4.0"/102mm Refractor Telescope Kit, 900mm f/8.8 Apochromatic Refractor, Manual Equatorial Mount Omni XLT 102 ED Refractor Telescope Omni XLT 102 ED 4.0"/102mm Refractor Telescope Kit





Orion EON 120mm ED Apochromatic Refractor

Your Price:  $1,999.95

Orion EON 120mm ED Apochromatic Refractor

The EON 120ED's optics consist of a fully multi-coated, air-spaced 120mm objective doublet lens of exceptional quality, containing one element of FPL-53 extra-low dispersion -- "ED" -- optical glass. The ED glass virtually eliminates the color fringing around bright objects resulting from chromatic aberration. Images are crisp, sharp, and color-pure, even at high magnification. The big 120mm objective has a 900mm focal length (f/7.5). Baffles inside the optical tube, glare threads in the focuser drawtube, and a retracting lens shade/dew shield eliminate unwanted glare. Like all EON telescopes, the 120ED has a beautifully machined Crayford-type 2" focuser with a removable 1.25" insert, allowing use of either 2" or 1.25" accessories. The gearless Crayford design provides smooth, zero image-shift focusing. The dual-speed focusing knobs have an 11:1 micro-focusing ratio. The focuser is rotatable 360 degrees, allowing comfortable eyepiece positioning or easy image framing when you're taking pictures. A dovetail finder scope base comes standard and accommodates any Orion finder scope or EZ Finder. The EON 120ED comes with two hinged tube rings and a dovetail mounting plate. Also included are an aluminum objective lens cap and a sturdy, aluminum-clad carrying case with custom foam interior and carrying handle. Weighs 14 lbs., 9 oz. One-year limited warranty.









Classic Dob Family!