You wanted to get folks advice on this. I have a Red 25 and a Dark Red filter that I want to use with my OMD EM5. My goal is to get the dark sky and stark cloud images. I was trying them out today and the results were not good. I shot in monotone and the images were muddy and bad. Any thoughts on this? I know I can get some of these effects processing color images - my preference is to get the image I want using the filter and little processing. Thank you.