Field corrector-Sky-Watcher Esprit-100ED & 100EDX
Optional flattener for the Esprit 100EDX. Check the alignment and focus.
CHF 259.00
CHF 1'339.00incl. Swiss VAT
Will be ordered for you
Timeframe: 10 days to 3 weeks
Estimated shipping: Between November 22 and 27, 2026
Visit Sky-Watcher Esprit-100EDX is an apochromatic triplet ED refractor designed to meet the most demanding astrophotography requirements. With its 100 mm f/5.5 objective, high-capacity 3" rotating focuser and CNC-machined components, it rivals the optics of the biggest brands on the market - for a much more affordable price.
The heart of the Esprit-100EDX is a perfectly corrected triplet lens incorporating a Ohara FPL-53 Japanese ED glass lens. This type of design guarantees total color correction, even on the brightest stars. All air-glass surfaces benefit from MHTC treatment (Metallic High Transmission Coating), offering light transmission up to 99,5 %.
The f/5.5 focal ratio ensures an ideal compromise between optical speed for astrophotography and visual resolution. The image is high-contrast, sharp and free from colored bangs.
The Esprit-100EDX is equipped with a 3" Linear Power eyepiece holder CNC rack-and-pinion, with 11:1 reduction, designed to support heavy cameras without bending. It features a double rotation (rotating focuser + rotating adapter) for easy orientation of the camera or optical train. The fog screen is fixedThe tube comes with sturdy clamps with central handle and 75 mm Losmandy dovetail.
The build quality of this scope, combined with its compactness (565 mm) and fast lens, make it a highly sought-after solution for full-frame sensors. A dedicated field corrector (ref. 20188, optional) is available to ensure perfect field flatness across the entire sensor surface.
Supplied without eyepieces, angled bends or finder. These accessories must be ordered separately.
Visit Sky-Watcher Esprit-100EDX is one of the best 100 mm scopes on the market in this price range. It combines everything an expert astrophotographer is looking for: impeccable optics, stable mechanics, compatibility with large sensors, and compactness. A benchmark instrument in the world of Super APO triplets.
Order from Deep Space Astronomy—personalized advice and support in Switzerland.
The Sky-Watcher Esprit 100EDX is an apochromatic triplet refractor with a 100-mm-aperture FPL-53 lens and a focal length of 550 mm (f/5.5), designed primarily for deep-sky astrophotography. Its focal length is ideal for medium-sized nebulae (Orion, the Lagoon, the Trifid, and the Rosette), large galaxies such as M33 or the M81-M82 pair, and star clusters. With a fast f/5.5 aperture, it allows for reasonable exposure times even when using narrowband filters.
With an APS-C camera featuring 3.76 µm pixels (Sony IMX571 sensor), you get approximately 1.41″ per pixel for a field of view of 2.4° × 1.6°.
Yes, whenever you're using an APS-C or full-frame sensor: like any uncorrected triplet lens, it has a slight field curvature that stretches the stars in the corners. Dedicated correctors: Field corrector-Sky-Watcher Esprit-100ED & 100EDX.
63 mm from the flattener (55 mm with the 8-mm ring). This back focus is measured from the thread to the sensor, including the rings, filter wheel, and focuser: maintaining this measurement to the nearest millimeter ensures that stars remain round at the edges.
The tube weighs about 6.3 kg; with the camera, filter wheel, and guide scope, expect it to weigh around 7.8 kg: an HEQ5-R Pro-class mount provides plenty of headroom. A refractor requires no collimation: once balanced, it’s ready to use as soon as it reaches operating temperature. At 56.5 cm long, it fits easily in the trunk.
Yes, as a bonus: with an angled mirror and an eyepiece, it provides high-contrast, color-accurate images of the Moon, the planets, and double stars, up to about 200× magnification.
Here are a few accessories we've selected for this model, depending on your needs.
Optional flattener for the Esprit 100EDX. Check the alignment and focus.
Motorized eyepiece holder that replaces the original one. Be sure to use the dedicated adapter (PL3600395) and check the connections, the corrector, the load, and the draw of your mount.
Optional PLUS 131 mm clamps to replace the clamps already provided. Check the actual tube diameter, the dovetail, the screws, the mounting, and the balance.
GIOTTO 150 flat panel and ALTO-1 motor, as shown by PrimaLuce on an Esprit 100EDX setup. Check the mount, rod, or clamp, centering, travel, cables, and balance before installation.
