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Sky-Watcher Esprit 100EDX Flattener

Sky-Watcher Esprit 100EDX Flattener

by Sky-Watcher
SKU SW-S20217
CA$330.00 - CA$330.00
CA$330.00
CA$330.00 - CA$330.00
CA$330.00
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  • Field Flattener Matched to the Esprit 100EDX
  • 44mm Corrected Image Circle
  • Point-Like Stars Across Full-Frame Sensors
  • Designed for the Esprit 100EDX 550mm f/5.5 Triplet
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Framing Simulator
Framing SimulatorInstant FOV Preview

Preview your camera's FOV

See exactly how your targets fit with the Sky-Watcher Esprit 100EDX Flattener, on real sky survey data.

Launch Imaging Assistant
Vignetting Calculator

Will your imaging train vignette?

Check which filter and adapter sizes clear the sensor with the Sky-Watcher Esprit 100EDX Flattener, and how much light the corners lose.

Check vignetting
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Sky-Watcher Esprit 100EDX Flattener

    The Sky-Watcher Esprit 100EDX Flattener is the optically matched field flattener for the Esprit 100EDX Super APO Triplet. It corrects the telescope's natural field curvature and delivers a flat field across a 44mm image circle, so stars stay point-like across the entire sensor, including full-frame cameras.

    44mm Flat Field for Full-Frame Sensors

    A refractor's focal plane is naturally curved, which stretches stars toward the edges of a large sensor. This flattener corrects that curvature across a 44mm image circle, wider than the diagonal of a full-frame sensor, so stars remain round and sharp from the center to the corners.

    Matched to the 100mm f/5.5 Esprit 100EDX

    The Esprit 100EDX is a 100mm, 550mm focal length f/5.5 triplet with one Ohara FPL-53 ED element. Pairing it with its dedicated flattener turns this fast triplet into a complete wide-field astrograph for large nebulae, star fields and galaxy groups.

  • Which telescope does this flattener fit?

    It is made for the Esprit 100EDX only. For the Esprit 70EDX or the Evostar 100EDX, use the Esprit 70EDX / Evostar 100EDX Flattener (S20216).

    Will it cover a full-frame camera?

    Yes. The 44mm image circle is larger than the roughly 43mm diagonal of a full-frame sensor, and it covers APS-C and smaller sensors with room to spare.

    Does it fit the older Esprit 100ED (non-EDX)?

    This flattener is made for the Esprit 100EDX only. Contact us if you own an earlier Esprit 100ED and we will help you find the correct corrector.

    What back focus does the flattener need?

    Sky-Watcher had not published the back focus specification for this flattener at launch. Contact us before ordering and we will confirm the correct sensor spacing for your camera.

  • UPC 810098970761
    Optical Specifications
    Type Field Flattener
    Image Circle 44mm
    Compatibility
    Compatible Telescope Esprit 100EDX
    Telescope Focal Length 550mm (f/5.5)
    Magnification Factor 1.0x (field flattener)

    • Esprit 100EDX Flattener

      × 1

  • Sky-Watcher 2-Year Limited Warranty