Chris Howard's Blog, page 69
March 23, 2018
Same shot of Pinwheel Galaxy, but cropped to just show M101 and...
Same shot of Pinwheel Galaxy, but cropped to just show M101 and NGC 5477 (top), M101 is a spiral galaxy about 21 million lightyears from earth in the constellation Ursa Major (Big Dipper). (Light frames: 10 x 120 secs, 4 x 600 secs, 12 x 300 secs). William Optics GT81 APO refractor, ZWO ASI071MC-C camera at -10C, iOptron CEM25P EQ mount. http://SaltwaterWitch.com
March 22, 2018
archatlas:
Libraries by Timtom Thomas Guignar Thomas Guignard...
Libraries by Timtom Thomas GuignarThomas Guignard (a.k.a. timtom) is a librarian based in Toronto, Canada. He has been practicing photography since 2006, and recently he has mostly been focusing on architecture and landscape photography. One of his longest running projects has been photographing libraries.
March 21, 2018
Castle Island–with green grass and snow, out the window of...
Castle Island–with green grass and snow, out the window of a 737 during our approach to Logan Airport (Boston).
Leaving Chicago, on the way back to Boston.
Leaving Chicago, on the way back to Boston.
March 19, 2018
Another one from Saturday night’s astro session. Part of...
Another one from Saturday night’s astro session. Part of the Orion Molecular Cloud Complex that surrounds the blue supergiant Alnitak (large star in the center), including the Flame Nebula (NGC 2024), IC 434, Horsehead Nebula (Barnard 33), NGC 2023, IC 431, and more. About 1500 lightyears from earth. (22 x 300 sec frames, 24 dark frames). William Optics GT81 APO refractor, ZWO ASI071MC-C camera, iOptron CEM25P EQ mount. In case you’re wondering, I’m pretty damned excited about this camera (ZWO ASI071MC), just going off what it can capture in faint nebulosity, and what I can bring out without much effort by stretching 22 stacked frames. I can’t wait to see what I can capture in the summer when the big galaxies like Andromeda and Triangulum swing through. http://SaltwaterWitch.com/astronomy
March 18, 2018
March 16, 2018 - This was the first chance I’ve had to put...
March 16, 2018 - This was the first chance I’ve had to put the ZWO ASI071MC through some serious long exposure tests on four very different targets, the region around Alnitak in Orion, the Rosette Nebula, Markarian’s Chain, and M101 - Pinwheel Galaxy. I ran most of these frames with unity gain (90 Gain, 20 Offset), and I built up a nice library of dark calibration frames in the afternoon, for 600, 300, and 120 second exposure times. Here’s my setup for last night’s astro session, with the William Optics GT81 APO refractor, ZWO Astronomy Cameras ASI071MC-C, iOptron CEM25P EQ mount.
Markarian’s Chain in the Virgo Cluster of galaxies,...
Markarian’s Chain in the Virgo Cluster of galaxies, including M84, M86, the Eyes Galaxies (NGC 4435 and NGC 4438) and a few more galaxies and galaxy pairs. About 52 million lightyears away. 30 x 120 sec frames, 20 dark frames, stacked in DSS. William Optics GT81 APO refractor, ZWO ASI071MC-C camera, iOptron CEM25P EQ mount. http://saltwaterwitch.com/astronomy
