Here is an image I processed of M81, M82 and the surrounding IFN using a downloadable Data Set. (I wont say where from as I don't want it to be seen as advertising on the forum). Imaged with The Epsilon 180ED and ASI2400MC Pro in Spain. This shot uses 3hrs of OSC and 2hrs of Ha/OIII all 180s sub exposures Processed with Pixinsight and Photoshop. Its the first time I've processed using Dual Band filters on a ONC camera. The Epsilon 180ED was known for halos especially with Narrow Band filters, no signs of that with these filters, I think filter technology must have advanced quite a bit.
Thank for looking
Peter