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For the serious astrophotographer seeking a fast astrograph with immense light-gathering prowess, our 10" f/4 Newtonian Reflector Astrograph should top your wish list. This imaging powerhouse reveals dim objects as astonishingly bright with just minimal exposure times of your DSLR or astronomical camera. Relative to premium refractors of even half its aperture, this 10" scope's affordable price makes it a terrific value.
Our 10" f/4 Newtonian Reflector Astrograph's 250mm (9.8") parabolic primary mirror is made of low-thermal-expansion BK7 glass, which is superior to standard soda-lime glass. The 1000mm focal length is ideal for framing a wide variety of celestial targets! The enhanced aluminum mirror finish has 92% to 95% reflectivity and is coated with a protective layer of SiO2 (quartz). The 88mm minor axis secondary mirror provides excellent full-field illumination with modern cameras, with minimal light drop-off at the edge of APS-C sized sensors. The rear cell features large collimation knobs and a built-in fan to speed cooling of the mirror (requires 8 AA batteries, not included). The mirror is center marked to aid in precise collimation, and a quick-collimation cap is included.
The machined 3" dual-speed (10:1) Crayford focuser boasts a linear bearing design, which adds rigidity to the drawtube to support heavier imaging loads. A steel reinforcing plate directly under the focuser eliminates flexure between it and the tube. The focuser's 2" collar accepts 2" accessories and comes with a 1.25" eyepiece adapter, both with non-marring compression ring clamps. A 2" extension adapter (35mm length) is included for visual observation.
Additional standard accessories include two cast aluminum tube rings, an 8x50 crosshair finder scope, and dust cap. As with any fast Newtonian, a coma corrector (sold separately) is recommended to achieve flat-field imaging performance. Backfocus distance is 92.4mm from the 2" drawtube collar. Weighs 33 lbs., 12 oz.
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.
Beginner Level - Suited for a wide range of uses, these products are simple to operate and set up. Some initial assembly may be required depending on the type of product. Optical instruments with this rating will have very good optical and mechanical quality. Great for families, young people, and folks who don't want to mess with equipment and complexity. Beginning level telescopes will show you countless lunar craters, Saturn's rings and a myriad of star clusters and nebulae! Referring to the manual is recommended.
Intermediate Level - These products offer higher performance and more advanced features than Level 1: Beginner models. They typically take a bit longer to learn and need some set-up or adjustments. But anyone with the slightest technical bent will have no problem getting familiar with these models. Referring to the manual is recommended.
Advanced Level - These products provide the best performance but may require more skill to master and appreciate. Optical instruments with this rating have exceptionally fine optics and mechanics. Some are easy to use but might be on the large or heavy side. Some are intended for specialized uses. These products will appeal to the more technically inclined. Referring to the manual is highly recommended.
For telescopes, the optical diameter (also known as aperture) is the size of a telescope's main light-collecting lens or primary mirror, measured in millimeters or inches. Telescopes with larger optical diameters collect more light, which leads to an increase in brightness and image resolution compared to smaller instruments.
For binoculars, the optical diameter (also known as objective lens diameter) is the size of each of the front-facing objective lenses of a binocular measured in millimeters. Binoculars with larger objective lenses collect more light, which increases image resolution and brightness. Binoculars with larger objective lenses are recommended for low light situations, and binoculars with at least 50mm or larger objective lenses are recommended for pleasing astronomical observations at night.
10" f4 optical tube assembly 8x50 finder scope and bracket 12V cooling fan (installed) Pair of tube rings 2" extension adapter (35mm length) Quick-collimation cap Vixen-style dovetail mounting bar 2.5mm and 5mm Allen wrenches
Orders received by 1pm Eastern Standard Time for in-stock items ship the same business day. Order received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.
A per-item shipping charge (in addition to the standard shipping and handling charge) applies to this product due to its size and weight. This charge varies based on the shipping method.
Standard Delivery: $0.00Standard Delivery to Canada: $30.003 Day Delivery: $35.002 Day Delivery: $35.00Next Day Delivery: $35.00
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