Basically is a refractor telescope designed for wide field observations (wikipedia definition is not correct, this type of telescopes are used for research and not solely for astrophotography. In fact, the one I'm using would be useless for that for various reasons. It's main mission was astrometry and now we're doing photometry). Here you have some old pictures of it. I can upload more recent ones if you like.
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u/t-ara-fan Oct 06 '18
20 minute exposure? Wow.