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Sky-Watcher Starlux 190MN

SKU SW-S11550
Original price CA$3,300.00 - Original price CA$3,300.00
Original price
CA$3,300.00
CA$3,300.00 - CA$3,300.00
Current price CA$3,300.00
Price Match Policy!
  • 190mm Maksutov-Newtonian Optical Design
  • 1000mm Focal Length
  • Fast f/5.3 Focal Ratio
  • Radiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity
  • 2" Dual-Speed Crayford Focuser
  • Weighs 29 lbs with accessories
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty
  • Sky-Watcher Starlux 190MN Astrograph

    The Sky-Watcher Starlux 190MN delivers apochromatic-level performance in a high-throughput design, combining a 203mm primary mirror, a 1000mm focal length, and a fast f/5.3 focal ratio. Its integrated Maksutov corrector lens eliminates the need for additional flatteners, providing pinpoint stars across a wide, flat field, while the Radiant Aluminum Quartz (RAQ)™ mirror coatings ensure 94% reflectivity for maximum brightness on faint deep-sky targets. With a secondary obstruction of just 34% by diameter, the Starlux 190MN maintains the high-contrast views critical for resolving fine planetary and nebular detail.

    f/5.3 Maksutov-Newtonian Optical System

    The Starlux 190MN's optical design provides a coma-free, flat field without requiring external corrective optics. The front meniscus corrector corrects for spherical aberration from the 203mm primary mirror, delivering sharp stars edge-to-edge, a capability essential for modern large-format sensors. This integrated correction makes it an ideal instrument for astrophotographers seeking refractor-like performance at a fraction of the cost.

    • Inherent Flat Field: The Maksutov corrector design eliminates the need for a separate field flattener, simplifying your imaging train and reducing potential flexure points.
    • High-Contrast Views: The 34% central obstruction is optimized for deep-sky imaging, providing bright, detailed images while still offering excellent performance for visual observation of planets and the Moon.

    94% Reflectivity RAQ™ and Fully Multi-Coated Optics

    Every optical surface is optimized for maximum light transmission to preserve the faintest details. The borosilicate primary mirror features Sky-Watcher's exclusive Radiant Aluminum Quartz (RAQ)™ coatings, which achieve 94% reflectivity for brighter images. The BK7 corrector lens is fully multi-coated to suppress reflections and maximize contrast, ensuring the final image is free of ghosting and internal scatter.

    Imaging-Ready at 29 lbs

    The Starlux 190MN is built for stable, precise imaging sessions. The robust 2" dual-speed Crayford focuser provides smooth, exact focus adjustments without image shift, critical for achieving sharp results at the f/5.3 focal ratio. The optical tube assembly weighs 29 lbs and measures 37.5 inches long, requiring a stable German equatorial mount in the EQ6 class or higher to carry it with the necessary rigidity for long-exposure astrophotography.

    • 2" Dual-Speed Focuser: Offers a 10:1 reduction ratio for fine-tuning focus, essential for both visual and photographic applications.
    • Included Accessories: Comes ready to mount with a V-style dovetail bar, tube rings, and an 8x50 right-angle correct-image (RACI) finderscope for comfortable object location.
  • What kind of mount is required for the Starlux 190MN?

    With an OTA weight of 29 lbs, the Starlux 190MN requires a robust German equatorial mount with a payload capacity of at least 40-45 lbs for astrophotography. Mounts like the Sky-Watcher EQ6-R Pro or similar are recommended to ensure stability and precise tracking for long exposures.

    How does the Starlux 190MN's 34% central obstruction affect planetary imaging?

    A 34% obstruction is a moderate value that represents a trade-off between maximizing light-gathering for deep-sky objects and preserving the highest contrast for planetary detail. While a pure planetary scope might have a smaller obstruction, the Starlux 190MN still delivers excellent, high-resolution views of Jupiter's cloud bands and Saturn's rings, making it a highly capable all-around instrument.

    Do I need a coma corrector or field flattener with the Starlux 190MN?

    No. The Maksutov-Newtonian design has inherent correction for both coma and field curvature. The front meniscus lens corrects for aberrations before the light reaches the primary mirror, delivering a flat, sharp field of view without the need for additional corrective optics.

    What is the advantage of the 8x50 RACI finder included with the Starlux 190MN?

    The included 8x50 Right-Angle Correct-Image (RACI) finderscope offers two main benefits. The right-angle design allows for more comfortable viewing when the telescope is pointed high in the sky, and the correct-image orientation means star patterns are not reversed, making it much more intuitive to navigate from a star chart to the eyepiece view.

    How will the Starlux 190MN perform on a large target like the Andromeda Galaxy (M31)?

    The Starlux 190MN's 1000mm focal length and f/5.3 speed are an excellent match for large galaxies like Andromeda (M31). It provides a wide enough field to capture the full extent of the galaxy with a full-frame or APS-C sensor, while the large 203mm aperture gathers enough light to resolve its dust lanes, star-forming regions, and satellite galaxies M32 and M110 in a single frame.

    What does "apochromatic performance" mean for the Starlux 190MN?

    Apochromatic (APO) performance means the optical system corrects for chromatic aberration, or false color. In this all-reflective design, light is focused by mirrors, not lenses, which completely eliminates color fringing. This ensures that stars are pure white and planetary details have true-to-life color, similar to the performance of a high-end APO refractor but at a much larger aperture.

  • Optical Design Maksutov-Newtonian
    Primary Aperture 203mm
    Focal Length 1000mm
    Focal Ratio f/5.3
    Mirror Coatings Radiant Aluminum Quartz (RAQ)™ with 94% reflectivity
    Lens Coatings Fully Multi-Coated
    Glass Type BK7/Borosilicate
    Secondary Diameter 64mm
    Secondary Obstruction (by diameter) 34%
    Secondary Obstruction (by area) 11%
    Dawes Limit 0.61 arc-seconds
    Rayleigh Limit 0.74 arc-seconds
    Limiting Magnitude 13.9
    Minimum Magnification 27x
    Maximum Magnification 374x
    Light Gathering (vs. 6") 11% more
    Focuser 2" Dual Speed Crayford
    OTA Length 37.5"
    OTA Outer Diameter 9.5"
    OTA Weight (with accessories) 29 lbs
    UPC 050234115506
    • Starlux 190MN OTA

      × 1

    • 8x50 Right-Angle Correct-Image Finderscope

      × 1

    • Tube Rings

      × 1 set

    • V-Style Dovetail Bar

      × 1

  • Sky-Watcher 2-Year Limited Warranty