First up is M13, 20 exposures of 30 seconds

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Discussion Overview

The discussion revolves around astrophotography experiences using various telescopes and cameras, focusing on specific celestial objects such as M13, M57, M27, M81, and M15. Participants share their imaging techniques, challenges faced during capturing images, and the quality of their results, with a mix of technical details and personal anecdotes.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant describes using a Bresser Skylux telescope and a ToUcam Pro II webcam to create a mosaic of the moon, noting poor seeing conditions.
  • Another participant shares a link to a photo of the Milky Way, indicating it is not their own work but a found image.
  • A participant discusses their first night using a new telescope and camera setup, opting for quantity over quality in exposures for M13, while acknowledging potential issues with image processing.
  • Further images of M57 and M27 are mentioned, with one participant noting problems with hot pixels and amp glow due to possibly forgetting dark subtraction.
  • One participant recounts a long night of astrophotography in cold conditions, mentioning tracking issues and the need for autoguiding for longer exposures.
  • Another participant expresses a need for color balancing in their reprocessed image of M27.
  • A question is raised about the type of telescope and exposure times needed to capture similar images, indicating curiosity about the equipment used.
  • A participant describes their new telescope setup, mentioning that the objects photographed are relatively bright and do not require extensive exposure times.

Areas of Agreement / Disagreement

Participants share various experiences and techniques without reaching a consensus on specific methods or outcomes. There are multiple viewpoints regarding equipment choices, exposure times, and image processing challenges.

Contextual Notes

Some participants mention issues with tracking and focusing, as well as the impact of environmental conditions on image quality. There are references to specific technical challenges like dark subtraction and color balancing that remain unresolved.

Who May Find This Useful

Astronomy enthusiasts, amateur astrophotographers, and individuals interested in telescope equipment and imaging techniques may find this discussion relevant.

Brinx
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Last night I played around a bit with my small bresser skylux telescope (70/700 refractor) in combination with a ToUcam pro II webcam. I made a mosaic of the moon out of 7 separate AVIs which were stacked in registax. The seeing wasn't very good (it's been quite warm here in Holland lately!) and the moon was only about 20 degrees above the horizon. Click on the link for a full-size version (1000x1200 pixels).

http://img88.imageshack.us/my.php?image=moon150720062kd7.png
 
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Nice job Brinx!
 
...Continued from my "I Did It thread. First night using the new scope, I'm going for quantity over quality tonight - I'm using my old DSI Color instead of my new DSI II b/w. This way I get color images in one shot instead of needing 4 sets. Obviously, the sensitivity is lower, and the resolution is too. So far, my paper dew shield is getting the job done...

First up is M13, 20 exposures of 30 seconds. Though I took some 5 and 15 second exposures to compare, I'll call this my first real image with this scope. In darkening the background, I may have clipped it a little. I only spent a few minutes on the processing.
 

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Here's M57 - about 40 30 second subs.

Also, not an astrophoto, but a good one of me with the scope. Note the Pleaides in the background (totally accidental). It's a 5 second exposure with a flaslight illuminating the telescope.
 

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M27, 20 frames, 30 sec. Perhaps I forgot to turn on dark subtraction - I got a lot of hot pixels and amp glow. I'll have to go back and work on that. Still, some of the faint nebulosity (the handlebars) is visible.
 

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Over Thanksgiving, I took my telescope to the Poconos and spent 9 hours in a random parking lot... (yes, I am somewhat insane)

First up is a 45 second luminance frame of M81. I took rgb photos too, but in the 4 hours since I set up, the temperature dropped 30 degrees, my telescope shrank and went out of focus, and I didn't notice. Oops - still climbing that learning curve...

M77 came out pretty well, but the stars are slightly elongated from continued minor tracking issues (its a lot better, though).

M15 shows a big improvement over that M13 photo from a month ago. The scope was a little out of collimation, which I think is why the stars were a little smeared on that one.

I'll probably need to start autoguiding soon. I was hoping for consistent tracking up to 2 minutes, but it isn't happening. I may be able to tweak the mount a little (the tracking is better sometimes than others, suggesting an adjustment in the gears may help), but at my focal length, I probably won't be able to get it to take longer exposures without a guidescope.
 

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I also redid M27. I think I need some work in color balancing - M27 is more green than my image has it.
 

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Those are some pretty cool photos. What kind of telescope would one need to see stuff like that? How much exposure do you need?
 
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My new telescope is the Orion Atlas 11 (a C11 with an Orion Atlas mount) in 147 and the camera is a Meade DSI II Pro. The objects I've taken pictures of already are relatively bright, so you don't need quite that much for them (though more exposure would be good).
 

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