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• 07/07/11
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06/30/11
    
Thursday, July 7th, 2011
 Between Midnight and 1:30 am I was able to do my first true piggyback shooting with the XSi mounted to the Celestron 9.25 Edge. I was tracking and polar alignment was pretty good for 2 minute exposures.
 
I began by focusing using Liveview on Arcturus. Then I moved to the Lagoon Nebula and took 10 light frames and darks. Lens was zoomed to 55mm and ISO 1600 for 2 minute exposures tracking for a total of 20 minutes.
 
Next I moved to Deneb and refocused in Liveview after which I took 5 lights of the North American Nebula and some darks. Lens was zoomed to 35mm and ISO 1600 for 2 minute exposures tracking for a total of 10 minutes.
 
Processing in DSS this morning showed the lens picked up the top of the OTA and the finder scope requiring that I crop the final picture from DSS before processing. Future piggybacking will require mounting closer to front of scope.
 
Other lessons learned is I need a longer USB 2.0 cable to go from camera to laptop, need to cover the laptop screen in red cellophane and provide a hood over it while imaging to reduce the effect on night vision. I also need to tie down all the cables running from the scope to my work table.
 
After processing, I was satisfied with these first results but saw that I should have checked focus on the Lagoon shots before taking the lights. Somehow I think the focus was a little off. I also think ISO 800 and shorter shots with more lights will improve the noise a lot. But it is a start!
 

 

 
 
 
 





Comments:
On 07/07/11 at 11:59pm Barry wrote:
I'm with you. Free is a great price. I am all about doing more with less.....for less $. I haven't used to EOS utility, but I will try it.

On 07/07/11 at 05:32pm Larry wrote:
I'm just shooting with the EOS utility and saving RAW right to my hard drive. DSS opens them nicely, never have had a problem. I've used it with RAW acquired by both my XTi and XSi with no problems. I'm just going cheap right now and will eventually get ImagesPlus or some other commercial program but during the steep learning curve I'm on right now, I like to use free stuff whenever it makes good sense.

The XSi shows a lot of red as it is a Gary Honis modified camera with the filter removed. I like the images I'm getting from it so far.

On 07/07/11 at 03:54pm Barry wrote:
I have been using a Canon 350D (XT) for deep sky photography, but I would like to try out my new Canon T3 for some wide field images.

May I ask what program you are using to capture your wide filed images with the XSi?

Are you capturing in "raw" or some other format? Someone mentioned that Deep Sky Stacker wouldn't stack XSi/T3 frames????

Thanks



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