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M42 - The Great Orion Nebula
Lens: 55-300mm DAL Camera: K-30 Photo Location: Melbourne, Australia ISO: 6400 Shutter Speed: Above 6s Aperture: F5.8 
Posted By: hjw, 11-30-2014, 12:31 AM

This time of year is quite interesting for astro photography. There are some interesting objects in the sky and one of the most spectacular would be Messier 42, the Great Orion Nebula. Over the last few night I collected 20 minute worth of images (101 frames in total) and stacked them with DSS. The final image is a 100% crop of the orion nebula. All frames were taken with the help of O-GPS1 with exposure times ranging from 10 to 30 seconds.
Thanks for looking!

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11-30-2014, 04:30 AM   #2
PJ1
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Nice shot. What focal length did you have the lens set at? I am waiting for my K-3 to arrive so I can put my OGPS-1 to work. M42 would be a good place to start. I have dark skies here. About 40 years ago, at Macleod in Melbourne, I set up my first SLR (an Exa) to look through a Bushnell Spacemaster telescope (using some gaffer tape) and pointed it at M42. I was using B&W film which I processed myself. I was pretty happy with the result at the time but it would probably be fairly rough by today's standards. I wouldn't know the image is now.
11-30-2014, 04:50 AM   #3
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Nice ....
11-30-2014, 06:05 AM   #4
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QuoteOriginally posted by PJ1 Quote
Nice shot. What focal length did you have the lens set at? ...
I used 300mm. You have to use one of the extremes (either 55 or 300) to have the shots reproducible when you collect frames over several nights.

11-30-2014, 06:49 AM   #5
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M42 in the title - I thought you would be using a m42 mount lens! But good shot, I didn't know DA 55-300mm could be used so well for such photography! Really skillful
12-01-2014, 04:37 PM   #6
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Nice result. Thanks for sharing.
06-28-2018, 07:50 AM   #7
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QuoteOriginally posted by hjw Quote
This time of year is quite interesting for astro photography. There are some interesting objects in the sky and one of the most spectacular would be Messier 42, the Great Orion Nebula. Over the last few night I collected 20 minute worth of images (101 frames in total) and stacked them with DSS. The final image is a 100% crop of the orion nebula. All frames were taken with the help of O-GPS1 with exposure times ranging from 10 to 30 seconds.
Thanks for looking!
I hope to shoot this soon too!
06-28-2018, 06:52 PM   #8
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QuoteOriginally posted by FozzFoster Quote
I hope to shoot this soon too!
Wow - I had forgotten about this post. Brings back memories
There is a astrophotography subforum here (Astrophotography - PentaxForums.com) with a small but enthusiastic community. You might want to have a look.

06-28-2018, 08:33 PM   #9
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Well done! I've never had any luck with stacking.
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