GSO's parabolic primary mirrors are perfect for those who want to build their own telescopes or replace mirrors in older ones. For the best experience on our site, be sure to turn on Javascript in your browser. These make it easy to collimate the primary mirror without tools, even while wearing gloves or mittens in cold weather. We are now pleased to offer virtually the entire line of GSO's Newtonian optics in the US market. This very smooth mirror surface results in excellent optical performance with practically no light scatter. BK7 is far superior in thermal characteristics to soda lime float glass - the glass used in consumer products like cookware - that's used in many reflectors in this price range. See photo 2 above for an example. The light weight standard equipment mounting rings of the Astro-Tech Imaging Newtonian allow you to use it on a wide variety of dovetail plates and German equatorial mounts - from the most basic to the most elaborate high payload go-to system. Split tube rings: A pair of die-cast aluminum hinged split tube mounting rings are provided. The result is exceptional contrast, far better than a conventional reflector for both imaging and visual observing. No. Additional Information: Q. I wrote an earlier review that is posted above. In addition to deep space imaging, the Astro-Tech AT8IN is also usable for solar system imaging as well as deep space and solar system visual observing. Upon reflection there are a couple of additions that I would like to add to my review above. While the rolled steel optical tube is a little heavier than a more-costly aluminum tube, the Sky & Telescope review points out that "it also helps make it a very rigid setup, which is a good thing for astrophotographers." It's fairly light weight and you can tell they put a lot of thought into the engineering. It has been modified for robotic operation and it's full capability is not being used due to a small CCD Chip. Drove up from Dallas to get one of these, well worth the trip. 14 viewed per day. Is a test report included with each mirror? Still a great deal! |
I debated on what kind of Newt I should get for a long time and I'm happy I settled on the AT8IN. Extended optical tube with 15 internal baffles: To increase the contrast, the optical tube of the Astro-Tech AT8IN is extended 8.75" forward of the focuser centerline to act as a lens shade to keep ambient light from hitting the diagonal mirror. If the mirror already has a center dot but you do not want it, we recommend that you not purchase this item. The secondary holder's design makes it difficult to collimate properly and most users find that they need to replace pieces of hardware to get it adjustable. Parks Parabolic Primary Mirrors … Ranging in aperture from 6” to 16” and offered in various f-ratios, these mirrors are made from optical grade BK-7 glass. The drawtube has 34mm (1.35") of travel. A couple of these uncoated edge strips will typically be covered up by the clips in your mirror cell anyway. Condition: New. Built-in cooling fan: A low-vibration/high CFM fan is mounted on the primary mirror cell. Astronomics is a family-owned business that has been supplying amateur astronomers, schools, businesses, and government agencies with the right optical equipment and the right advice since 1979. GSO Parabolic Primary Mirror - 8" f/4. Good scope for the money. Please Note: This mirror in stock at this time is NOT center-dotted. elliptical diagonal mirror. This size reflector fits very well on a Sirius/Atlas mount and probably could be used on an AVX weight mount if you had a lightweight camera and guider. Free Shipping (within the 48 contiguous US States only) PARKS 8" f/4 Primary Mirror . B270 glass is equivalent to BK7 in performance and optical quality. The tube is very thick and has a beautiful finish. For those who want to build their own telescopes or replace mirrors in older ones 8. 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