M42 - multiple exposure times

[26Left]

After several months imaging dim and difficult DSOs, I thought I'd revisit M42. I have imaged this many times in the last two years, and I always find that the central area gets burnt out. For such a big and bright target, it's quite difficult to image.

This time, I decided to try and compose an image from different exposure times using the method suggested by Jerry Lodriguss. This image is made up from:

• 40 subs of 3 minutes each
  
• 16 subs of 30 seconds each
  
• 1 5 second sub for the Trapezium
  

I used an unmodified Nikon D7000, Hutech IDAS filter and my Meade 5000 127mm APO. I stacked using Nebulosity and processed in PS CS5.

I'm pleased with the result, especially as I have caught the Trapezium...

...and the components of Iota Orionis...

The picture isn't quite framed as I'd have liked, but that's difficult with a focal length of 950mm.

I hope you enjoy my picture and welcome any comments, good or bad.

Tom.

[Black Knight]

It's very nice. Well defined with lots of detail. I'm having real trouble getting the right exposure time for the Trapezium. I tried 6 second subs and it was still burnt out! Gotta go lower!

/cues the limbo music

[Zul]

Very very nice!