Shelyak Spectroscope eShel complete system (54346)

The Shelyak eShel complete system is a professional-grade, fibre-fed echelle spectroscope designed for astronomical research and advanced amateur spectroscopy. This system provides everything needed for high-resolution spectroscopy, except for the telescope, acquisition CCD camera, guiding video camera, and computer. The eShel system is engineered for robust performance, ease of use, and precise measurements, drawing on Shelyak’s extensive experience in the field and collaborations with leading experts.

The Shelyak eShel system is a complete, high-resolution echelle spectroscopy solution for astronomy, suitable for both research and advanced amateur use. Its modular design, precise calibration, and user-friendly software make it an outstanding choice for anyone looking to perform detailed spectroscopic studies of celestial objects.

System Components and Features

Echelle Spectroscope

• Cross-dispersed echelle design with a resolution greater than 10,000 (R>10,000)

• Includes an 85mm f/1.8 objective lens

• Collimator with 125mm focal length (f/5)

• R2 high-efficiency echelle grating and coated prism cross-disperser

• Compact construction optimized for visible wavelengths (approximately 450–700 nm)

• Designed for use with 50µm fibre, suitable for large telescopes

Fiber Injection & Guiding Unit

• M42 T-adapter interface for telescope connection

• 43mm backfocus

• Mirror with a 50µm hole for f/6 standard version (75µm f/9 version available upon request)

• Calibration fibre input with remote-controlled mirror position

• Fibre optics: 50µm object fibre and 200µm calibration fibre, each 20 meters long and protected by metal/plastic casing with FC connectors

• Guiding camera interface (C-mount)

Calibration Unit

• Thorium-Argon lamp with high-voltage power supply for precise wavelength calibration

• Flat lamp for echelle order geometry and blaze function processing

• Electronics for remote control of calibration frame acquisition

Software

• User-friendly and open-source, based on the AudeLA platform and Tcl/Tk language

• Compatible with MS Windows

• Multi-language support

• Remote operation capability

• Automatic spectra reduction after acquisition

• FITS file support with multiple HDU

• Ability to export individual spectral orders or merged spectra

Included Accessories

• All necessary cables and power supplies for standard European mains (220V)

What You Need to Add

• Telescope

• Acquisition CCD camera

• Guiding video camera

• Computer