Spectroscopy, from initiation to performance
3 780,00 € incl. VAT - 3 150,00 € excl. VAT
eShel III spectrograph objective, to upgrade your eShel II to an eShel III.
This objective, designed specifically for the eShel III, incorporates a new 122-mm optical system that extends the instrument’s spectral range to approximately 370 to 910 nm.
You must use a camera with a SONY IMX 571 sensor (we recommend the ASI 2600 MM Pro).
It also includes a motorized focuser that can be controlled via (among other protocols) ASCOM or INDI.
| Description | Shelyak ref. | Included |
Acc. type
|
Cooled
|
Comment
|
| Camera Atik 460EX Mono | SE0124 | Camera Science | yes | The standard CCD camera for the eShel II | |
| Caméra ASI2600MM-Pro | EL0271 | Camera Science | yes | New generation CMOS camera |
This objective was designed specifically for the eShel III, which allows for an expanded spectral range.
Spectrum of Sunlight
Orders #22 through #61 are uniformly focused.
Spectrum of Chi Oph Be star
This allows us to process orders #25 through #60 and extend the usable spectral range from approximately 370 to 910 nm. 
The motorized version of this lens comes with a Primaluce Lab focuser that can be controlled via ASCOM or INDI drivers, among other methods.
By Olivier Garde The eShel II spectroscope features an 85-mm focal-length camera lens that is no longer manufactured; an alternative had to be found, so Shelyak Instruments designed its own 122-mm focal-length Petzval-type lens. This “custom” design has made it...
You'll find all our Demetra video tutorials on this web page. Demetra is a free software package for processing spectra from the ALPY 600, LISA and eShel spectrographs from the Shelyak Instruments range. Playlist of Demetra tutorials Tutorial #1 Introduction to...
