This H-alpha image of the Swan Nebula shows a good deal of detail in the hydrogen nebulosity.

Details
2010-08-11/12 in backyard in Victoria.
Conditions - clear and 12deg C with some thin mist.
Equipment - H-Alpha filtered Canon T1i (modified) on 105mm refractor with 0.8x reducer on HEQ5 mount.
Exposure - 65- 60s lights at ISO 3200 with 25 darks and 8 flats for calibration.
Processing in Images Plus and Photoshop.