The Shelyak Alpy 600 is the core element of the ALPY product line, with a 600gr/mm grism (grating + prism), Alpy 600 offers compactness, low resolution (resolving power R~600) and a dispersion compatible with current CCD cameras in astronomy.

Specifications

• F/4 spectrograph
• slit/slitless modes (25µm hole; 25µm, 50µm, 100µm, 300µm slits; 3mm hole / 5µm tolerance)
• R~600 (resolution around 10A)
• light & compact: weight less than 200gr
• M42 camera thread; backfocus 10.5-21mm
• standard 1.25" telescope adapter with filter thread

A 1/2 inch or larger CCD camera with less than 21mm back focus and M42x0.75 thread is required for use with the Alpy 600. There is an optional C-mount adapter which replaces the M42x0.75 adapter of the Alpy 600 to work with a C-mounted camera. A Barlow lens element specially designed for the Alpy 600 extends the back focus to work with a DSLR camera; it enlarges the spectrum too.