I’m continuing my exploration of “lucky imaging” of the solar system objects, this time with the Sun. A special filter made by DayStar allows only a very narrow wavelength of light through when observing the Sun that is emitted by hydrogen gas. You can see in this image how the gas is swirling around on the Sun, cooler areas (not COOL, just cool-ER) manifesting as sunspots, and of course a few prominences on the edge of the Sun proper. The Suns surface was taken with very short exposures, and the prominences were taken at a slightly longer exposure that causes the surface to just appear solid white. So the two were merged to show the entire view. This is a good example of what we space photography nerds call dynamic range. The full range of brightness in this image can’t be captured by a single exposure length as the camera doesn’t have that much range. Well, truth is, many people do pull that off, and with more practice I may too. For now, two exposures worked well enough for me<g>. Please be sure, this was a very special (and expensive) solar filter. If you turn your Christmas scope to the Sun, you will likely damage the scope, blind yourself, and yes, potentially set something on fire (perhaps your shirt!). Don’t try this at home kiddies, I’m a professional… well, sorta.
For some technical details, the camera (a Player One Apollo Max) is monochrome, or black and white. The image was colorized after the fact for aesthetic reasons. I’ve looked through this filter, and Hydrogen Alpha light is a bright electric pink. It’s only a single wavelength of light, and there’s no point in using a color camera. I matched it in Photoshop… but, man it makes for an ugly picture! Other details… Sky-Watcher USA Esprit 150 refractor with a Televue 4x Powermate to get the focal ratio where it needs to be for the special filter I used (rays of light to the filter need to be pretty direct on and not slanted like at faster focal ratios).
As far as processing goes, I’m getting traction, but I can critique several things about this image. Truth is though, I’ve reworked it a few times already and am ready to apply what I’ve learned now to my next image. Rest assured…. there is ALWAYS a next image.