Gary, Gary, Gary!
What a stunner, mate.
I did almost the same thing last month (posted
here) except I didn't do the super-widefield as you have done.
Tell me, is your 300D modified or unmodified? And, is that 50mm the F/1.8 or F/1.4? What did you stop it down to? F/2.5-F/2.8?
I have been dying to do the Rho Ophiuchus region, and pick up all that splendid red. It'll have to wait until next year.
Well done, mate.
Regards,
Humayun