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Vixen ED100SF Refractor OTA Telescope Package
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Vixen ED "S" series refractors display sharp, color-free images of high contrast.
- This apochromatic 100mm (4") refractor has a focal ratio of f/9 and weighs about 8 pounds.
- The Vixen ED100sf Refractor package includes the new dual-speed focuser, a tube ring, dovetail, and a 2" to 1.25" adapter with T-threads.
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The ED 100Sf is now available with Vixen's Dual Speed Focuser. Vixen's apochromatic refractor has an extra-low dispersion (ED) lens which depresses residual aberration to ahcieve a high level of performance. Coupled with a medium f/9.0 focal ratio, the ED "S" series provides sharp, high contrast color-free images. For the astronomer that wants the best value for the dollar in a 4” APO, this is the one to get. Vixen ED APO Refractor OTA Specifications
- Optical Design: ED Apochromatic Refractor
- Effective Aperture: 3.94" (100mm)
- Focal Length: 35.4" (900mm)
- Resolving Power: 1.16 arc seconds
- Limiting Magnification: 11.8
- Light Gathering Power: 204X
- Tube Dimensions: 4" x 34.6" (100mm x 880mm)
- Threads/Visual Back Size: 2.4" (60mm), 1.7" (42mm) threaded for T-ring/2" (50.8mm), 1.25" (31.7mm) push fit
Image shows flip mirror and finder, which are not included with this item.
User Reviews
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Review Date: 1/27/2009
Reviewed By: G. Wang
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Outstanding Value
This is a wonderful refractor. 4 may not sound like lots of aperture, but it is a very versatile scope. First, it is lightweight, and build solidly enough. This gives lots of mounting options and I consider it grab 'n go. The focuser is very functional with no image shift. On a cold day (25 degree differential it takes about 20 minutes to cool for high power views. Views of bright objects are virtually color free. In good seeing, I've had tack sharp views of Saturn and Jupiter. I also had a great time using the ED100 on the last opposition of mars. On the moon, it is capable of stunning wide views and showing fine detail like craterlets in Plato. This is a very proficient double star scope, splitting Alrescha, pi Aquilae and Propus. Colors in Albireo, iota cancri, and Hind's crimson star are stunning. If you can reach semi dark skies, you can complete the Messier list with th... |
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