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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.
Sky-Watcher Evostar EDX 100 APO f/7 Doublet Telescope

Sky-Watcher Evostar EDX 100 APO f/7 Doublet Telescope

by Sky-Watcher
SKU SW-S11145
$892.13 - $892.13
$892.13
$892.13 - $892.13
$892.13
Price Match Policy!
  • 100mm Objective Lens Diameter
  • 700mm Focal Length (f/7)
  • Doublet APO (Ohara FPL-53 ED Glass)
  • Upgraded 2.8" Dual-Speed 11:1 Crayford Focuser
  • Retractable Dew Shield
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Sky-Watcher Evostar EDX 100 APO f/7 Doublet Telescope

    The Sky-Watcher Evostar EDX 100 represents a major architectural shift for the 100mm Evostar line. While the classic 100ED was renowned for its f/9 focal ratio, the new EDX 100 moves to a faster f/7 design, offering a wider field of view and significantly shorter exposure times for astrophotography. This transition to a "faster" system is supported by a complete mechanical overhaul designed to meet the rigors of modern imaging.

    By utilizing an Ohara FPL-53 ED glass element, the EDX 100 maintains the color correction of its slower predecessor while offering a more compact and versatile form factor. It is a high-performance, diffraction-limited instrument that serves as a bridge between portable wide-field refractors and high-resolution planetary tools.

    Apochromatic Performance at f/7

    The move to f/7 increases the photographic speed of the telescope, but Sky-Watcher has ensured that optical integrity remains paramount. The ED doublet design features a positive crown element paired with a negative Ohara FPL-53 extra-low dispersion element. This combination virtually eliminates chromatic aberration, providing clean, high-contrast views of bright targets like the lunar limb or the rings of Saturn.

    Each air-to-glass surface is treated with Metallic High-Transmission Coatings (MHTC), ensuring that 99.5% of light reaches your eyepiece or sensor. The result is an image free of ghosting and internal reflections, even when observing faint deep-sky objects near bright stars.

    Redesigned Mechanical Suite

    The EDX 100 is built for stability and precision. The most notable upgrade is the 2.8-inch indexed dual-speed 11:1 Crayford focuser. This larger drawtube is significantly more robust than the standard 2-inch versions, providing the stiffness required to hold heavy CMOS cameras and filter wheels without tilt or flexure.

    • Integrated 360° Rotatable Adaptor: Framing your target is seamless thanks to the rotatable adaptor on the drawtube, allowing you to align your sensor without disturbing the focus.
    • Retractable Dew Shield: The new sliding dew shield reduces the transport length to just 570mm, making the EDX 100 much more portable than the fixed-tube f/9 models of the past.
    • Functional Carrying Handle: The CNC-machined tube rings are joined by a top rail that doubles as a carrying handle and an accessory mounting platform (Vixen-style).

    The Perfect Mid-Sized Astrograph

    With a native focal length of 700mm, the EDX 100 is perfectly sized for medium-to-large nebulae and galaxy clusters. For those seeking even more speed, an optically matched 0.92x Focal Reducer/Flattener is available, bringing the system down to f/6.44 for faster deep-sky acquisition. Whether you are a visual purist or a dedicated imager, the EDX 100 offers professional-grade features at a highly competitive price point.

  • How does the EDX 100 compare to the older f/9 100ED?

    The EDX 100 is significantly faster (f/7 vs f/9), which means it has a shorter focal length (700mm vs 900mm). This provides a wider field of view and requires shorter exposures for photography. Mechanically, the EDX is superior with a 2.8" focuser, a retractable dew shield, and an integrated rotator—features the older f/9 model lacked.

    Does the faster f/7 ratio introduce more false color?

    While faster doublets are generally harder to correct, the use of FPL-53 glass and modern lens figuring allows the EDX 100 to maintain excellent apochromatic performance. For visual use and most imaging scenarios, the chromatic aberration remains negligible.

    Is a field flattener required for photography?

    For small-sensor cameras (like 1/1.8" or 1" formats), you may not notice significant field curvature. However, for Micro Four Thirds, APS-C, or Full-Frame sensors, we highly recommend the dedicated 0.92x Reducer/Flattener to ensure sharp stars across the entire frame.

    Can I use 2-inch accessories with this telescope?

    Yes. The 2.8-inch focuser drawtube comes with an adaptor that accepts standard 2-inch star diagonals and accessories, as well as 1.25-inch eyepieces via a reduction adaptor.

  • Optical Design ED Doublet Apochromat
    Aperture 100 mm
    Focal Length 700 mm
    Focal Ratio f/7
    ED Glass Type Ohara FPL-53
    Coatings Proprietary MHTC
    Focuser 2.8" Dual-Speed 11:1 Crayford
    OTA Length (Retracted) 570 mm
    OTA Length (Extended) 675 mm
    OTA Weight 5.5 kg (12.1 lbs)
    • Sky-Watcher Evostar EDX 100 OTA

      Evostar EDX 100 OTA

      × 1

    • Aluminum Storage Case

      Aluminum Carrying Case

      × 1

    • Tube Rings and Vixen Dovetail

      Tube Rings & Vixen-style Rail

      × 1

  • Sky-Watcher 2-Year Limited Warranty