Skip to content
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.

Country

Sky-Watcher Starlux 190MN

SKU SW-S11550
Original price $2,375.00 - Original price $2,375.00
Original price
$2,375.00
$2,375.00 - $2,375.00
Current price $2,375.00
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
Backordered
Availability Info
FREE Shipping in CONUS
  • 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