Telescope 150EDX ESPRIT - Skywatcher
Designed for the discerning amateur astronomer, the Sky-Watcher ESPRIT series refractors achieve performance equivalent to high-end equipment. With their exclusive three-element air-spaced design, chromatic aberration is completely controlled, delivering images with exceptional sharpness and contrast. The "spirit" of this range lies in an objective lens featuring a high-quality ED triplet. Thanks to a central ED glass (from the renowned Japanese manufacturer Hoya), Sky-Watcher has opted for the best to deliver high-performance optics for both planetary and imaging. Moreover, the barrel is adjustable, unlike other manufacturers.
The use of multi-layer coatings on all surfaces significantly limits losses due to lens pass-through, making the Esprit 150EDX brighter and more contrasty than conventional, less well-corrected refractors. The "Metallic High-Transmission" (MHC) treatment is applied to the air-glass surfaces ensuring stunning results (transmission close to 99.5%).
In terms of brightness, a 150mm refractor collects 56% more light than a 120mm model, making the Esprit 150EDX a large astronomical refractor prized by many enthusiasts. It allows for both superb planetary observations and deep-sky photography, all without central obstructions and with high image sharpness.
Optional dedicated field corrector
An optional screw-in field corrector (less flexing) features two 48mm diameter lenses and provides a perfectly flat field of view across the entire image circle. Its oversized lenses ensure a wider, brighter aperture and exhibit no internal reflections. Thanks to the optional corrector, the Esprit 150EDX can be fully utilized at its f/7 focal ratio. This makes it particularly suited to deep-sky photography. Point the Esprit 150EDX at hundreds of nebulae or galaxies with a digital camera or CCD/CMOS camera.
The Sky-Watcher Linear Power 11:1 Focusing System
The Sky-Watcher Esprit series features a high-quality focuser: the Linear Power. To be consistent with the optics and provide good results in astrophotography (where focusing is paramount), the focuser is a high-capacity rack-and-pinion system for larger sensors. With a 3" (76mm) input format, the Linear Power (patented design) is both robust and precise thanks to an 11:1 gear ratio.
The sliding tube features a steel guide rail running on four large ball bearings, providing great smoothness and preventing shifting during focusing. A thumbscrew maintains focus depending on the orientation of the optical tube. The Linear Power also features a graduated scale on the sliding tube so you can identify multiple positions depending on your equipment. Finally, the focuser output rotates 360° without losing focus, helping you find the best framing.
Robustness
To meet the demands of amateur astronomers, the optical tube is made entirely of steel and machined with high precision using a CNC (computer numerically controlled machine). No plastic parts are used! This ensures robustness and a particularly attractive appearance. The interior is blackened and baffled to limit the intrusion of stray light. Two wide collars and a wide Losmandy-type dovetail are included for a secure attachment to your mount.
Specifications
- Optical Design: Triplet apochromatic objective lens
- Useful diameter: 150mm
- Focal length: 1050mm
- F/D ratio: 7
- Image circle diameter (corrected): 44mm (with optional corrector)
- Mechanical backfocus: 170mm (at native focus) - 98mm (with optional field corrector)
- Focusing device: 3" Linear Power rack and pinion with 1:11 gear ratio
- Rotating focuser: Standard double swivel - 2" (50.8mm) and 1.25" (31.75mm)
- Multiple photo adapters (included)
- Retractable dew shield
- Optical tube length: 920mm (dew shield retracted) - 1030mm (dew shield extended)
- Optical tube weight: 14.5kg
Included Items
- 1x Sky-Watcher Esprit 150EDX Refractor Optical Tube
- 1x Pair of Sky-Watcher Clamps
- 1x Sky-Watcher Losmandy Male Dovetail
- 1x Retractable Dew Shield
- 1x Carrying Handle with Synta-Type Finderscope Base
- 2x Synta-Type Finderscope Bases
- 1x Set of Photo Adapters
- 1x Hard Carrying Case
