I've been imaging deep-space objects for a while now using mostly my Explore Scientific ED 102mm APO combined with a modified Canon Rebel T3i and attached a Skytech cls-ccd filter. This combination is great for H-alpha regions such as the Rosette nebula, Heart/ Soul nebula, etc. However, I am still missing most of the green and blue characteristics of most DSO's. Therefore, I wanted to begin using Oiii and Siii filters and see if I can still capture some of the blue/ green in my light polluted sky.
I've been using mostly DeepSkyStacker and Photoshop for my processing and don't have any clue how should to combine Ha, Oiii and Siii images in Photoshop.
Any guidance on this part if highly appreciated. Thanks in advance.