[February 2014] Below are first spectra with the Alpy 600 using a Stellarvue SV80S APO @ f/6 and The Imaging Source DMK41 video camera. Results with the DMK41 camera have been most rewarding. The Sony ICX205AL 1/2" format CCD with 4.65u square pixels, 1280x960 resolution is well suited for use with the Alpy 600, allowing spectra to be recorded between 3800-6800 Angstrom. So far, the DMK41 camera being non-cooled and only an 8 bit imaging system has not been a hindrance recording spectra of stars down to 8th magnitude. Recording and combining 10 to 30 frames, and using a dark frame in post processing seems to keep noise down to reasonable levels.
[March 2014] An Atik 420M monochrome CCD camera is the latest addition to the system. The 420M uses a Sony ICX274 CCD with 1620 x 1220 resolution, utilizing 4.4u x 4.4u pixels so overall resolution is a little better than with the DMK41. The 420M will produce images with far better s/n with cooling to -25 degree ambient and 16 bit image depth.
[May 2014] Acquired an Alpy 600 off-axis guiding unit and using it with a DMK41 video camera. A very effective piece of equipment for centering the star on the spectroscope's slit, and with all but the brightest stars, I can guide on the star I am recording. I will now also be able to use the Alpy 600 on my C9 SCT for fainter objects such as galactic-novae and super-novae, along with fainter variable stars.
The Alpy 600 continues to be money well invested. Results with my SV80S have been most rewarding. A VERY well thought out instrument....results speak for themselves.
Purchased the Alpy 600 spectrograph and Alpy off-axis guider from Woodland Hills Camera & Telescopes, @ telescopes.net Friendly folks, excellent service. "Yeah, I'd buy a used car from them."
|Alpy 600 spectrograph
with Alpy off-axis guider with DMK41 video and Atik 420
mono CCD camera,
Stellarvue SV80S f/6, 80mm guidescope with DMK21 video, Losmandy GM8 mount.
Alpy 600 spectrograph with Alpy off-axis guider with DMK41 video and Atik 420 mono CCD camera,
Celestron C9.25 SCT with 0.6x reducer in Moonlite motorized focuser, Losmandy G11 mount.