- Orion's Sword 20131227
Playing around with astrophotography. This is a stack of about 580 dark-subtracted exposures from a stationary mount, 0.3 seconds each, ISO 1600, Pentax DA* 300mm f/4 wide open. Trailing of stars is still apparent. I'm impressed by how much detail even a single exposure contains. It would be nice to get the O-GPS1 accessory to extend the individual exposure time to several seconds without star trails. - Delphinus 20140826
First night using the Astrotracer functionality of the Pentax O-GPS1. 4x120 seconds on a fixed tripod. Stacked with DeepSkyStacker. - Andromeda 20140826
First night using the Astrotracer functionality of the Pentax O-GPS1. 11 exposures totalling 319 seconds on a fixed tripod. Stacked with DeepSkyStacker. - Comet Lovejoy C/2014 Q2 near Pleaides
Pentax K-5 II, Pentax O-GPS1 Astrotracer, Tamron 70-200mm f/2.8 12 x 120s, 70mm, f/3.5, ISO 80. - Moon, Venus, and Mars
I took this out my open bedroom window, so the seeing was trash. - Perseid self-portrait
Composite of a flash-illuminated foreground shot and 366x20s sky exposures. - ISS transiting the sun
Composite of 4 exposures showing a solar transit of the International Space Station. Photographed from Gallitzin State Forest, Pennsylvania, USA at 2015-08-29 14:12:42 UT. The duration of the transit was 0.8 seconds. The distance to the ISS was approximately 616 km and its angular size was about 45 arcsec. Planning for the transit was done using CalSky.com. Pentax K-5 II, Pentax DA* 300mm f/4, Tamron 1.4x teleconverter, ND 1000x filter. Exposures were 1/6000 second with the lens set to f/8 (for an f/11 effective aperture with the teleconverter). - ISS Lunar Transit
Composite of 13 exposures showing a lunar transit of the International Space Station. Photographed from Croyle Township, Cambria County, Pennsylvania, USA at 2016-05-28 08:45:48 UT. The duration of the transit was 1.3 seconds. The distance to the ISS was approximately 715 km and its angular size was about 39 arcsec. Planning for the transit was done using CalSky.com. Pentax K-5 II, Pentax DA* 300mm f/4, Tamron 1.4x teleconverter. Exposures were 1/2000 second with the lens set to f/4 (for an f/5.6 effective aperture with the teleconverter). - Moon and Jupiter
- Munch, Munch
August 2017 total solar eclipse Lake Keowee, South Carolina, USA Partial phase, just before the sunspots get eaten. - Passing Cloud
August 2017 total solar eclipse Lake Keowee, South Carolina, USA - Eclipse composite
August 2017 total solar eclipse Lake Keowee, South Carolina, USA - Last Sliver
August 2017 total solar eclipse Lake Keowee, South Carolina, USA - Diamond Ring
August 2017 total solar eclipse Lake Keowee, South Carolina, USA - Corona, prominences, and Regulus
August 2017 total solar eclipse Lake Keowee, South Carolina, USA With this version of my second-longest exposure, I've tried to balance the structure in the corona with good detail in the large prominence. - Detail of solar prominence
August 2017 total solar eclipse Lake Keowee, South Carolina, USA - Extreme corona
August 2017 total solar eclipse Lake Keowee, South Carolina, USA This is from my longest single exposure. I pushed this one as far as I could, to the point of excessive noise and artifacts, to reveal the extended coronal structure and earthshine on the moon. - Sudden Brilliance
August 2017 total solar eclipse Lake Keowee, South Carolina, USA Profound overexposure as the limb of the sun reemerges from behind the moon. - Comet 46P/Wirtanen & Pleiades
Pentax K-3 II with Astrotracer, Tamron 70-200mm f/2.8 at 70mm, f/4, Hoya red intensifier filter to reduce light pollution, 25 x 10 seconds. I was not able to see the comet by eye with binoculars. The moon was near the field of view, to the right. - Partially eclipsed moonrise over Kawelikoa Point, Kauai