I've been a visual observer for a while now and have used an OIII filter 99.99% of the time for diffuse/bright nebula.I have a 1.25 inch UHC filter i rarely use and would be interested in some feed back on the type of objects /nebula etc which respond to this type of filter. I have a sirus nebula filter which i think is similar to a UHC.Does anyone else have one of these and what is your experience on its effectiveness?
Cheers Peter.