Sky-Watcher 150mm f/12 Maksutov-Cassegrain Telescope (OTA Only)

Sky-Watcher 150mm f/12 Maksutov-Cassegrain Telescope (OTA Only)

Sky-Watcher 150mm f/12 Maksutov-Cassegrain Telescope (OTA Only)

B&H # SK150MMMCOTA MFR # S11530
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Value: $46.99

Product Highlights

  • 150mm Aperture Maksutov-Cassegrain OTA
  • 1800mm Focal Length, f/12 Focal Ratio
  • Limited-Diffraction Optical System
  • Fully Multi-Coated Optics
  • Internal Primary Mirror Focusing System
  • 28mm Long Eye Relief 2" Eyepiece
  • 2" 90° Star Diagonal
  • 8x50 Straight-Viewing Finderscope
  • Vixen-Style Dovetail Plate
  • OTA Only - Mount and Tripod Required
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Sky-Watcher S11530 overview

  • 1Description

Balancing aperture with manageability and representing one of the widest apertures in the series, the Sky-Watcher 150mm f/12 Maksutov-Cassegrain Telescope is powerful while maintaining the portability of the smaller models. The Maksutov design exchanges the conventional front corrector plate of a Schmidt with a convex meniscus lens, resulting in a smaller secondary mirror that limits obstruction and increases contrast, while eliminating the need for periodic collimation. This modified optical path results in a slower focal ratio and narrower field of view versus a similar Schmidt, but the optical benefits, when coupled with the larger aperture and fully multi-coated optics, make this an ideal scope for making detailed solar, lunar, and planetary observations, while being able to resolve deep-sky objects like stars, clusters, galaxies, and nebulae.

The scope is outfitted with a large 2" visual back and, to get users started, Sky-Watcher includes a 28mm long eye relief eyepiece that produces a moderate 64x magnification and a 90° star diagonal for viewing with the optical tube assembly (OTA) pointed at or near the celestial zenith. The OTA is offered here without a mount or tripod for users who have a reliable support system or want to use it as part of a dual-OTA setup for star parties or observation/imaging rigs. It is outfitted with a Vixen-style dovetail plate for use with compatible mounts. This OTA's compact form factor belies its observation power and resolution and is ideally suited as a grab-and-go option for quick observation sessions or heading out to remote locations.

Optical Performance
  • 150mm aperture
  • f/12 focal ratio
  • 1800mm focal length
  • Front convex meniscus lens corrects spherical and chromatic aberrations and comas (off-axis aberrations) across the entire field of view
  • Smaller secondary mirror versus Schmidt-Cassegrains reduces obstructions and increases contrast
  • Fully multi-coated optics maximize light transmission to improve brightness, color rendition, sharpness, and contrast
  • Resolution: 0.77 arcsec; Dawes'
  • Internal primary mirror focus
  • 2"-diameter visual back accepts larger eyepieces and accessories
  • Requires mount and tripod for proper use
  • Vixen-style dovetail plate
  • Weight 14 pounds, including OTA and accessories
Included Accessories
  • Eyepiece:
  • 2" barrel diameter
  • Accepts most 2" astronomical filters
  • 28mm eyepiece yields 64x power
  • Comfortable long eye relief
  • Diagonal:
  • 2" snout and eyepiece holder
  • 90° angle places head in a comfortable viewing position
  • Star configuration corrects image horizontally for terrestrial use
  • Finderscope:
  • Relatively low 8x magnification provides a wide field of view for easier alignment and faster star-hopping navigation
  • Larger 50mm aperture helps resolve dimmer objects that dot finders cannot
UPC: 050234115308
In the Box
Sky-Watcher 150mm f/12 Maksutov-Cassegrain Telescope (OTA Only)
  • 90° Star Diagonal
  • 28mm Eyepiece
  • 8x50 straight view Finderscope
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description

    Sky-Watcher S11530 specs

    Optical Tube Assembly
    Optical Design Maksutov Cassegrain
    Aperture 150 mm / 5.9"
    Focal Length 1800 mm
    Focal Ratio f/12
    Eyepiece Barrel Diameter 1.25", 2"
    Diagonal Yes, 90 Star
    Finderscope Yes
    Mounting System Vixen Style
    Weight 14.0 lb / 6.4 kg
    Packaging Info
    Package Weight 17.3 lb
    Box Dimensions (LxWxH) 24.7 x 10.7 x 9.9"

    Sky-Watcher S11530 reviews

    150mm f/12 Maksutov-Cassegrain Telescope (OTA Only) is rated 5.0 out of 5 by 3.
    Rated 5 out of 5 by from Wow!!! Awesome Scope Just got my Mak Cas from BH, the scope is everything I hoped for. Having come from a 5 SCT at 1250mm, this scope brings things a lot closer and remarkably clear and bright despite it being F12 vs F10. I don't see a difference, and truly it isn't that much to even worry about as I am able to see everything I saw before from my red-zone light polluted driveway. The culmination was spot on (no pun intended), the accessories (diagonal, 28mm eyepiece, and 2 to 1/25 adapter) were welcomed additions knowing I didn't have to buy them; although, I have already purchased additional upgraded lenses and will replace the diagonal shortly. The Scope mounts nicely on my Celestron AVX. Hope this helps you decided, if you do get this, you will enjoy.
    Date published: 2017-03-13
    Rated 5 out of 5 by from Rugged I had a nightmare accident a few nights ago when the scope slipped out of the saddle onto my concrete driveway. It fell about two feet while I was doing the declination balancing on my CGEM II mount. Not only did it survive with a couple nicks on the collar. It had fallen onto the diagonal which got most of the shock. I put it back on the saddle, really tightened those bolts. I found a tiny star and checked collimation on both sides of focus and got concentric circles that showed the scope was still collimated and operational. I did not expect that. I was lucky this time and I will be extra careful to make sure the vixen is locked in. This scope is rear-end heavy, especially if you're using the 2 inch eyepieces which can be hefty.
    Date published: 2018-09-16
    Rated 5 out of 5 by from Mak Amazing telescope. Unfortunately not clear enough skies to give a in depth review. I ordered this telescope and only 2 day later it arrived at my door! Awesome job. Highly recommend b and H to Canadian consumer
    Date published: 2016-10-27
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