![]() ![]() This was done with a crop and not downsized. Whoops, almost forgot to answer your question: The image was 6000 pixels wide and is now 2400 pixels wide. She says I'm capturing "ancient light!" How cool is that? My wife and I are blown away by the fact that the light photons from the image Orion I posted here this morning left that nebula 1350 lights years ago. The weather was lovely last night so I spent a lot time sitting outside on my stool and just looking up and marveling. I love a good challenge and astrophotgraphy is certainly one heck of a challenge, however, I have to say that I am becoming captivated by the shear beauty and majesty of the night sky and the amazing things up there. Through my astro efforts I want to be able to produce some really nice images of certain deep sky objects like Orion and Andromeda and I want to also produce really nice Milky Way landscapes. I guess my problem is that I'm a pixel-peeping, perfectionist fanatic and I'm totally obsessive when I set my sights on something I want to do. Ha ha Lyle, you're very funny, and encouraging! How much has that image been downsized, and how much was cropped? How am I ever going to convince my spouse that I must have an Astro-Physics mount? I am amazed at what you're producing already, and distressed that you are quickly and efficiently destroying all my excuses. If that's "poor quality," most of us here are hopeless hacks. "espite the poor quality"?(!) Rudy, get serious. Now with the aperture mask the coma problem is solved, only a half stop of light is sacrificed, and no diffraction spikes are formed - a win, win, win! Here's the set of rings I bought: Also, when I first shot this lens I used F4 and there was ruinous coma throughout the frame making the image unusable. This method allows you to stop down the lens and improve optical qualities but without getting the diffraction spikes you normally get from the aperture blades when you stop down a lens.īelow is my previous attempt with the lens stopped down to f5.6 using the internal aperture mechanism, notice the significant diffraction spikes on the brightest stars. The lens was set at F4 and a series of step down rings was screwed onto the front that reduced the diameter to the equivalent of F5. we'll keep trying.Īnyways, the reason I posted this image despite the poor quality was to show the dramatic improvement an aperture mask makes. ![]() This image is still nowhere near the quality I am looking for and feel that my gear can produce, but for that I need about an hour of integration. I finally moved to another spot at 10:00 pm got all set up and realigned and was able to get 27 subs plus shoot the core separately before the night was done. We finally got a perfectly clear sky last, the first since Jan 17th, unfortunately the wind was a problem and I was in a badly exposed location. The Great Orion Nebula - Nikon D7200, 27 x 30 sec., ISO 1600, F4+aperture mask=>F5.1, DSS, PS CS5 ![]()
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