Computer Guided
Astrophotography
I finally got everything upgraded and configured so I can take images without having to hand-guide every picture. My C-8 telescope now has a new Byers worm gear drive and fork arms, a new drive corrector and a new computer with hardware encoders to tell me where the scope is pointed. I say new, but I purchased everything used from Astromart, except for a ST-4 compatible parallel port interface that I got from Shoestring Astronomy. My old drive corrector was not compatible with the ST-4 interface and would never be, so I had to replace it. But, while looking for a replacement, I found someone willing to sell a complete fork arm assembly with a JMI Mototrack V, which has the ST-4 compatible guiding interface. Coupled with the Shoestring ST-4 interface, my Toucam Pro and my laptop running a program called Guidedog, this new rig will guide my telescope for me while I take astrophotographs. Below is the first image with a higher power telephoto lens that was guided by my computer, instead of by me while hunched over the eyepiece! I would have to say this is a milestone in my astrophotography hobby: |
A rich Milky Way star field, along with the Trifid and Lagoon Nebulae, and a few other objects on 8/31/05. Four 120 second sub-images taken with a 200mm F/2.8 Canon telephoto lens at 400 ISO and a Canon Digital Rebel, stacked with IRIS. Telescope was guided with a Toucam Pro webcam, a laptop and Guidedog. |
All Images Copyright © 2005 Mike Broussard.
All rights reserved.
To send comments or for more information, please email me at
mike@synergyitg.com.
Visitors since August 31, 2005