Can you stack filters for veiwing (not Photography)?
For example
Would it be of any use stacking a UHC and an Oiii together for nebula observations?
Can you stack colour filters for Planetary Observations? The way I see it by combining coloured filters such as red and yellow I would be a different orange from the one I already have. Would it help or make a difference?
The colours I have so far for combining are: Violet, Light Green, Orange and Yellow
Finally : Does using an On-line Telescope in the Nth Hemi count for observation of Messier Ob's so I can tik off the ones out of my observation zone??? (Hope you understand this one!) Or
is it cheating??????????
Thanks for input. Steven A