Here is another large picture of the Lagoon and Trifid nebulae (1.5M).Not happy with it yet as the bright areas are a little washed out.Must learn how to use unsharp masking.Or lower the ISO.
http://users.bigpond.net.au/avandonk/lagtrif03.jpg
This was taken with a Hutech LPR filter. 4x191 sec at ISO of 1600 at F2.8.
Bert