M20 – SC8 at f/10 and ISO 3200
Telescope: Meade LXD75 SC8
Camera: Canon Rebel T2i (stock)
Filter: Orion Imaging Sky Glow Filter
Guide scope: None
Exposure: 88x30sec, ISO 3200 saved as RAW
Darks: Internal
Flat: Synthetic
Software: Backyard EOS, Digital Photo Professional, Deep Sky Stacker, Photoshop
I absolutely love this nebula both visually and photographically. The dust lanes are fascinating to see visually, and the contrast between the red emission and blue reflection nebula is just wonderful.
Beginners take note… I think I violated just about every ‘rule’ of imaging with this one; short exposures using high gain with an uncooled camera on an 8” SCT at f/10 on an entry-level mount aligned using just the polar scope without active guiding, stand-alone darks, flats, or bias frames with a target low in the sky under light polluted (red zone) skies on a warm summer night. About the only thing I had in my favor was the air was fairly dry, just on the verge of humid. The take-away is that while it’s great to have really good equipment, you can do quite a bit with relatively simple equipment, so if you’re thinking about getting started in imaging don’t hesitate to start with what you have. The experience you gain will be extremely valuable in guiding you towards the equipment and methods that are right for you, your interests, your budget, and your sky conditions.
Enjoy!
-John
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Very nice John! I this
Very nice John! I this original size or cropped? Prime focus?
Keith
Hi Keith. This was taken at
Hi Keith. This was taken at the telescope's native f/10 prime focus. This is fairly close to 100%. I cropped the edge to clean up the perimeter and to keep the original 6x4 aspect ratio. I then cropped the width to center it a bit better and to change the aspect ratio to 64x48. The image scale of the SC8 at f/10 is really nice, but to go after larger targets like M8 I'll bring the focal length back to f/6.3.
-John
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If 50 years of amateur astronomy and space exploration has taught me anything it is that the Earth is a very special place. It would be nice to protect it like it’s the only Earth we’re ever going to have.