Amazing Sky by Alan Dyer

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M20 & M21 (Telescope view).jpg

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M20 Trifid Nebula and M21 star cluster above it, taken with 4-inch Astro-Physics Traveler refractor at f/6 with 6x7 field flattener and Hutech-modified Canon 5D camera for stack of 4 x 8 minute exposures at ISO 800. Taken from Coonabarabran, NSW, Australia, April 24, 2007. Some trailing from scope aimed straight up and axes wandering -- some guiding error introduced that fattened stars and some passing thin cloud added glows to stars.
Copyright
Alan Dyer 2007
Image Size
6144x4096 / 5.0MB
Contained in galleries
Simulated Naked-Eye and Eyepiece Views
M20 Trifid Nebula and M21 star cluster above it, taken with 4-inch Astro-Physics Traveler refractor at f/6 with 6x7 field flattener and Hutech-modified Canon 5D camera for stack of 4 x 8 minute exposures at ISO 800. Taken from Coonabarabran, NSW, Australia, April 24, 2007. Some trailing from scope aimed straight up and axes wandering -- some guiding error introduced that fattened stars and some passing thin cloud added glows to stars.