Horse head and Flame Nebulae with SVR90T and H-Alpha Filter

Date: 01.23.2011 (last quarter moon)

Location: San Bruno, CA

Telescope: Stellarvue SVR 90T with Televue x0.8 reducer on Takahashi NJP-Z Mount

Camera: Qhy9 CCD with Astronomik HAlpha 12nm Filter

This is a stacking of 11 exposures of 8minutes.  Even with the short focal ration (f/d 5.6) obtained with the televue reducer, I had to apply 2×2 Binning and take a fair amount of exposure to get details in the Nebula.

The H-Alpha filter does wonder to combat light pollution, even though the FWHM of this filter is not very narrow (12 nanometers).

To capture this picture, I used the software Logme in to monitor the imaging session from the comfort of my living room…


  • Imaging setting outside, connected to my Toshiba Netbook, accessing the Network from a Wireless connexion. The Netbook controls the Qhy9 camera, the Orion autoguider, and the Takahashi NJP-Z mount (Ascom driver).
  • My Laptop, in the living room, allowing remote access to the Netbook using the LogmeIn software.

With long imaging session, getting remote access allows me to check if nothing goes wrong [ issue with tracking, clouds, etc] – without having to check every 20 minutes outside!

Here is a screenshot of the log me in screen with remote access to the Netbook controlling the imaging set up:

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