The Crab Nebula is a supernova (in the year 1054) remnant in the constellation of Taurus. The red channel of this LRGB composite is captured through a 5nm. narrowband filter, picking up strong halpha emissions.

You need some imagination to find this “Running Man”! Located in constellation Orion, this nebula is situated just above the great Orion nebula, M42. I had to take exposure time per sub down to 10 minutes for 1×1 binned images (to don’t wash out the bright stars completely) so there was some extra work involved more »

A pain! Why? Cause Atik’s inside T-thread only spans 2.5 mm.! An astro-buddy asked me to make one on the lathe. He already bought an adapter for Canon bayonet to 60 mm. with a 0.75 thread. Canon lenses have a back focus of 44 mm.. The Atik front to ccd distance is 17 mm., so more »