Cloud Break Optics

10" f/4 Imaging Newtonian OTA

10" f/4 Imaging Newtonian OTA - Main image
10" f/4 Imaging Newtonian OTA - View 2
$495.38 $799 In stock

Category: Reflecting Dobsonian

Description

iOptron’s 250mm (approx. 9.8") f/4 Newtonian optical tube assembly (OTA) with a fast F/4 focal ratio is perfect for imaging deep-sky objects with a DSLR or dedicated astronomy camera. The 3.25" Crayford-style focuser, dual split-hinged mounting rings, an 8x50 straight-through finder, and an 13" Vixen style dovetail plate make it ready to attach to your mount and start using.

Features

  • Dual speed 3.25" Crayford-style focuser with 1.25" adapter iEAF ready
  • BK7 optical glass primary mirror with a protective quartz layer
  • 8 x50mm finder scope
  • 13" Vixen style dovetail plate with solid full circumference mounting rings
  • Front dust cap
  • Optional iOptron iEAF Focuser (#8453)


Package includes
#6313 10" Fast Newt OTA

  • 10" Optical tube assembly
  • 8x50 mm straight-through finder with bracket
  • Tube mounting rings
  • 13" Vixen-style dovetail rail
  • 2" 35mm extension tube
  • Front dust cover

    Specifications

    Optical Design Newtonian
    Clear Aperture 250mm
    Focal Length 1000mm
    Focal Ratio f/4
    Focuser Dual speed Crayford-style
    OTA Length inches
    Outside diameter 12 inches
    OTA weight 34lb. 1oz
    Extension tube 2" diameter 35mm L
    Warranty One year limited
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    Customer Reviews (4.8 / 5 · 5 reviews)

    Ella U. ★★★★★

    The fast f/4 ratio really cuts down exposure time compared to my old scope, which is a game changer for capturing faint nebulae. I paired it with my DSLR and the 9.8" aperture pulls in plenty of light for sharp, detailed photos. Feels solidly built too, with no focuser slop right out of the box.

    Daniel A. ★★★★★

    I was surprised how well this f/4 Newtonian handles a DSLR without needing heavy counterweights—my imaging train stays perfectly balanced. The coma-free field is impressively wide for deep-sky shots, making framing galaxies much easier than my old f/8 scope.

    Christopher N. ★★★★★

    The f/4 focal ratio makes capturing faint nebulae a breeze with my DSLR, and the 250mm aperture pulls in plenty of light. It’s noticeably lighter than my old tube, which helps with balancing on the mount.

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