Robert Harding
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Taken with 90mm Stowaway AP Refractor, with Borg .85x compressor/flattener for f/5.6. With Canon 20Da camera at ISO 400 for 13 second exposure. on Skywatcher HEQ5 mount tracking at Lunar rate. Exposure kept long to bring out star background. original = 1 https://images.robertharding.com/zoom/RM/RH/HORIZONTAL/1350-9.jpg1350-9https://www.robertharding.com/licenses-explained/https://www.robertharding.com/preview/1350-9/mm-stowaway-ap-refractor-borg-x-compressorflattener-f/
1350-9 - Taken with 90mm Stowaway AP Refractor, with Borg .85x compressor/flattener for f/5.6. With Canon 20Da camera at ISO 400 for 13 second exposure. on Skywatcher HEQ5 mount tracking at Lunar rate. Exposure kept long to bring out star background. original = 1
Comet Holmes, 17P, taken Nov 1, 2007 on excellent night. Taken with A&M 105mm apo refractor at f/5 with Borg 0.85x compressor/field flattener on SkyWatcher HEQ5 mount. Canon 20Da camera at ISO400. Composite of 4 min, 2min, 1min, 30sec, 15sec, and 7 sec exposures, each exposure being a stack of 3 to 4 identical exposures. Registered and stacked in Photoshop (HDR mode did not produce usable result, so manually composited with sucessively smaller masks to reveal short exposure content around nucleus. Contrast exaggerated with Curves to bring out very faint tail structure. North up, so tail to the S and SW.Nucleus is dot at upper left of inner coma, other star in inner coma at right is a field star https://images.robertharding.com/zoom/RM/RH/HORIZONTAL/1350-16.jpg1350-16https://www.robertharding.com/licenses-explained/https://www.robertharding.com/preview/1350-16/comet-holmes-p-nov-excellent-night-mm-apo/
1350-16 - Comet Holmes, 17P, taken Nov 1, 2007 on excellent night. Taken with A&M 105mm apo refractor at f/5 with Borg 0.85x compressor/field flattener on SkyWatcher HEQ5 mount. Canon 20Da camera at ISO400. Composite of 4 min, 2min, 1min, 30sec, 15sec, and 7 sec exposures, each exposure being a stack of 3 to 4 identical exposures. Registered and stacked in Photoshop (HDR mode did not produce usable result, so manually composited with sucessively smaller masks to reveal short exposure content around nucleus. Contrast exaggerated with Curves to bring out very faint tail structure. North up, so tail to the S and SW.Nucleus is dot at upper left of inner coma, other star in inner coma at right is a field star
Mount Cook and Lake Pukaki with empty Mount Cook Road, Mount Cook National Park, UNESCO World Heritage Site, Canterbury region, South Island, New Zealand, Pacific https://images.robertharding.com/zoom/RF/RH_RF/HORIZONTAL/846-2007.jpg846-2007https://www.robertharding.com/licenses-explained/https://www.robertharding.com/preview/846-2007/mount-cook-lake-pukaki-empty-mount-cook-road/
846-2007 - Mount Cook and Lake Pukaki with empty Mount Cook Road, Mount Cook National Park, UNESCO World Heritage Site, Canterbury region, South Island, New Zealand, Pacific