> Milky Way in different filters
This is a comparison of my not modified Pentax k5 DSLR and the same, but modified one without IR-cut filter.
Removing the IR-cut filter not only increase sensitivity by 1-2 stops, but also slightly increase the resolution as the IR light (despite not being that much detailed) pass trough the byer RGB mask without filtering.
Below we can see a shot with UHC-s filter as well, witch give us best contrast and brightness of the H-alpha objects as Lagoon nebula (M8). Thus it needs the longest exposure 120s against 60-90s for the other filters. You can see the beautiful Galactic horse dark nebula on the shots :)
For a few months from now Betelgeuse (Alpha Orion) dim so much, that it looks as bright as the stars in the Orion belt. This is not so disturbing and does not mean that cataclysmic events are happening with it.
For my last trip to the Rodopa mountain I decided to cross the limits and to target an object that is hard to believe that a non-professional equipment could catch.
While cleaning up my PC I found sequences of shots of Virgo galaxy cluster taken during springs of the last 2 years. Those were attempts to shot this object, but I was not satisfied with the result and left them.
I recently bought a pocket spectroscope for laboratory use. You can find it at Ali for 5$. It is with glass prism and well build. So I did some test to use with a telescope but did not
http://www.deepskywatch.com/deep-sky-hunter-atlas.html This is an amazing resource. Detailed atlas of all the sky with NGC and IC objects.