Why Purchase from All-Star Telescope?
Free Expert Support
Whether you are a first timer needing help with setting up or an enthusiast that can't quite make that one thing work, our expert staff are ready to support your needs. With decades of knowledge and first hand experience we've been there and we can help you through it!
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You can trust purchasing and delivery with All-Star Telescope. All of our transactions are 100% secure and Level 1 PCI DSS compliant thanks to Shopify's ShopPay platform. For additional protection, we insure 100% of the value of every shipment we make. If it get's lost during shipment, we replace it. If it gets damaged during shipment, we replace it. We make sure your product arrives exactly as you would expect it to; we promise.
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30 Day Return Policy
Buy with confidence knowing that we accept returns up to 30 days after purchase. We want you to have something you will actually use and we are confident that we keep good quality products in our store with No Junk.
Price Match Promise
Shipping around for the best price is tough, we make it easier by offering the best pricing in the market. But if you find a better price on an in-store item somewhere else we will match it!
Product Description
Conquer coma and enjoy images with sharp stars across the entire field of view or photographic image frame in your fast Newtonian reflector with the Orion 2" Photo-Visual Coma Corrector.
The Orion 2" Photo-Visual Coma Corrector for Newtonians minimizes the coma inherent in fast Newtonian reflectors with focal ratios from f/3.5 to f/6. Coma appears as flared, comet-shaped stars and gets progressively worse farther out from the center of the field. This coma corrector greatly reduces this effect as well as the effects of field curvature, rendering sharp stars across the entire field of view or image frame. The 2" Photo-Visual Coma Corrector works for astrophotography as well as for visual observing with an eyepiece.
The optics are contained in a 2" nosepiece, which is threaded into the upper housing that features an eyepiece holder for 2" eyepieces. The eyepiece holder has a non-marring brass compression ring and two thumbscrews. The bottom of the nosepiece is threaded for Orion 2" filters. The third component is an M48-to-T2 (M42) adapter ring, which is useful when using the Coma Corrector for astrophotography.
For astrophotographic use, you unthread and set aside the upper housing and use only the optics-containing nosepiece. The Coma Corrector's back focus is about 75mm. For DSLR use you'll need a 20mm spacer ring (sold separately) to achieve proper image focus. For astronomical cameras additional spacing will be required, the amount of which can be determined by factoring in your camera's sensor position relative to its front flange.
For visual use some additional spacing may be required for certain eyepieces. Some users report that adding 0.75" (19mm) of spacing between the upper housing and optical nosepiece allowed perfect focus with their wide-field eyepieces.
The 2" Photo-Visual Coma Corrector produces a 1.1x magnifying factor. The optics are fully multi-coated for maximum light throughput. Weighs 11.3 oz, assembled. Instructions included.
Warranty note: Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at 800-447-1001.