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Hello Mitchell,
Great image. It's not easy to match the superb images with an unmodded dslr - that's also what I use. However, it is possible to get very good results - and your equipment seems quite capable of this.
Your image can be improved with a bit more processing, but to get a really good image of m42 - you need longer subs if possible - say 2 minutes. (also more overall time).
This will overexpose the core so you also need to take shorter subs - maybe down to 10 seconds and also 20 seconds. You will need to experiment with this. You then use these shorter exposures to make a composite image using masks in photoshop.
There is a tutorial on youtube that shows how to do this - it is quite detailed.
I don't know if this is the only way to do it - but it is the only way I know to get the detail from the fainter areas and controlling the over-exposed core. I've only used this technique once - it takes a bit of time.
Regards,
Tony.
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