> The simple spectroscopy
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
bring any good result, so I cut it and strip the optics. Left only the prism and place it inside a eyepiece projection tube. Also place a 17 mm plossl in front of the prism. Result is
a home made spectroscope that I can use for bright star spectrum and light pollution analyses. This task well fitted to my new Vixen VMC110 as the flap mirror help a lot of
locating the targets. Below are my first tests
This is a image of Betelgeuse. The white color is IR spectrum as expected from a Red giant:
This is Sirius system. You can see that most of it is a blue light as expected from a Blue hot giant:
This is led street light spectrum. It is not good that it emits in all the visible spectrum:
This is sky pollution background. Simmilar to the street light spectrum.
This is a comparison of my not modified Pentax k5 DSLR and the same, but modified one without IR-cut filter.
Astrotracer is a great way to take advantage of the Pentax DSLR camera in-body shake reduction mechanism. It is available since Pentax k5 and track celestial bodies by moving the sensor. Here is what is it ablout:
Staying at my home inspires me to make some documentation of my experience. I got a dedicated drive for my astrophotos and start reorganize them by objects. Here is an article of the most recent process I use on my photos. Enjoy: )
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.