During check-out, you will be presented with several shipping choices and costs. With classic Newtonian optics, this scope is easy to use and comes ready to go out of the box. Each GSO imaging Newtonian telescope at Agena undergoes a thorough physical, mechanical, and optical evaluation at our shop upon arrival - all at no extra cost to you. However, serious imagers with larger DSLR or astronomy cameras may wish to consider a GSO f/4 Imaging Newtonian or the GS630-LRN upgraded version of this item since these telescopes have a more robust dual-speed linear-bearing Crayford focuser. Sign up for our newsletter to get exclusive deals, observing tips, and new product announcements. It will provide you with a beautiful view of cloudy nebulas, different galaxies, and star clusters. A larger telescope primary mirror will also make your telescope heavier and longer. The aluminum coating is protected by a silicon oxide (SiO2) over-coating. Contiguous US Customers:All items we sell ship for free within the Contiguous US. Foucault Test: This knife-edge test is performed at the center of curvature of the primary mirror to evaluate the quality of the mirror's conic shape. 2. Go-To & Computerized TelescopesRoot - Agena, Miscellaneous Mount AccessoriesRoot - Agena, Agena Thanksgiving / Black Friday / Cyber Monday Sale, GSO 8" f/5 Newtonian Reflector Telescope - Steel OTA (White) # GS630, Skip to the beginning of the images gallery. During check-out, you will be presented with several shipping choices and costs. 00 SVBONY Diagonal Adapter Zenith Diagonal Mirror Prism 1.25inch 45 Degree Erecting Prism Optical Prism Inside for Astronomical Telescope Eyepiece 4.4 out of 5 stars 16 $18.99 $ 18 . This compact and affordable 200mm (approx. The tube also has an attractive outside gloss white finish and a matte black interior finish to reduce stray reflection and increase image contrast. GSO tests each mirror via laser interferometry before shipping, but does not provide individual test reports. For years, GSO has made dobsonian telescopes sold under various labels. * Not a Retail Store * 16313 Arthur StreetCerritos, CA 90703, USA. With a total weight of only 22lbs 10oz (with all included accessories) this scope is ideal for use with medium-duty equatorial mounts such as the Celestron CGEM and Skywatcher or Orion EQ-6 class mounts. GSO guarantees diffraction limited performance, but their mirrors typically have a mirror surface quality of 1/16 wave RMS at least, and often better. These mirrors are virtually unsurpassed in performance and will produce some of the finest images available for either visual, film or CCD work. For the best experience on our site, be sure to turn on Javascript in your browser. And with a price that's far less than a small ED refractor or Ritchey-Chretien scope, this OTA offers an economical alternative for imagers and visual observers on a budget who want a larger aperture. The precisely figured 8" f/5 primary mirror is made from BK7 optical glass for enhanced thermal stability. $499.99. The drawtube of the focuser is engineered to have minimal wear and very little flexure. If you want a center-dotting sticker, just request one from us at the time you place your order.If you want a mirror that does not have this center dot, please check with us before your purchase. William optics 2" Dielectric diagonal. This 8-inch reflector telescope is a great choice if you love to observe deep-space objects. You will even be able to catch details on the Moon and closer planets. It includes a dual-speed 2" Crayford-style focuser, dual split-hinged mounting rings, a 8x50mm straight-through finder, and a 13" Vixen/Synta-style red dovetail rail. Is the primary center-dotted?A. You can easily center-dot the primary yourself if the mirror you receive is not dotted. These rings make it easy to rotate the tube to bring the focuser and finder to the most comfortable viewing position. Please let us know. The primary mirror is mounted in a cell with six external push-pull collimation knobs on the back of the tube, and the center-marked primary makes collimation with a laser a snap. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. Portable, Light Weight, and Economical. Sometimes yes but mostly no. A couple of these uncoated edge strips will typically be covered up by the clips in your mirror cell anyway. We are now pleased to offer virtually the entire line of GSO's Newtonian optics in the US market. The precisely figured 8" f/5 primary mirror is made from BK7 optical glass for enhanced thermal stability. GSO uses high-volume, state-of-the-art, high quality manufacturing and test lines. Most parabolic mirrors will have 2-4 minor uncoated areas along the edge of the mirror. $33.02 to $149.72. The tube is 8.75" in diameter (9.5" at the end rings), 36" long, and it extends beyond the focuser to act as a shield to prevent stray light from entering the tube and reducing image contrast. It offers 40mm of focus travel and includes a focusing scale on the top of the drawtube to make it easy to return to the correct focus position during each observing session. Note that these are not defects. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.International Customers:Free shipping does not apply to international orders. 8") f/5 Newtonian offers a fast focal ratio that's ideal for observing wide-field views of deep sky objects. Ranging in aperture from 6” to 16” and offered in various f-ratios, these mirrors are made from optical grade BK-7 glass. Ronchi Test: We then perform a Ronchi grating test at the center of curvature at inside focus, at focus, and outside focus. The solid dual-speed 2" Crayford-style micro focuser handles nearly any eyepiece or lightweight camera. Round Mirror Plate - Set of 12 Round Mirror Trays - 8 inch Diameter, 1.5 mm Thick Rounded Edge - Perfect for Table, Wedding Centerpieces, Wall Decor, Crafts 4.8 out of 5 stars 597 $21.00 $ 21 . Jim's Mobile, Inc. (JMI Telescopes) is a world renowned manufacturer of astronomical telescopes and aftermarket accessories for the amateur and professional astronomer. The bottoms of the rings have threaded mounting holes for a Vixen-style mounting rail (which is included). It also has a tension knob to allow you to secure heavier loads. All rights reserved. Found a better shipped price? Please Note: This mirror in stock at this time is NOT center-dotted. Is a test report included with each mirror? * Not a Retail Store * 16313 Arthur StreetCerritos, CA 90703, USA. Removing the center dot is not easy or recommended. Besides parabolic primaries, we also offer matching GSO secondary elliptical mirrors, mirror cells, and spiders (all sold separately). GSO 8" f/5 Newtonian Reflector Telescope with LB Focuser Upgrade - Steel OTA (White) # ... Fast 8" f/5 Newtonian optics for wide-field observations of the night sky, Fully and rigorously tested on site for cosmetics, mechanical operation, and optical performance by a master optician to ensure excellent overall telescope operation and customer satisfaction (an Agena exclusive service), Dual-speed 2" Crayford focuser securely holds your eyepiece or lightweight camera with minimal wear and flexure, Includes 2" 35mm-long extension tube and 2"-1.25" eyepiece adapter, 13" red Vixen-style dovetail rail with dual split-hinged felt-lined mounting rings to protect tube finish, 8x50mm straight-through achromatic finder mounted on quick-release bracket, Center dot on primary mirror for quick and easy collimation, Solid rolled steel telescope tube with gloss white exterior finish and matte black interior finish to increase contrast and minimize thermal effects. JavaScript seems to be disabled in your browser. $19.99 shipping. It includes an 8x50mm straight-through achromatic finder with non-illuminated crosshair.