From under the hazy skies of Seattle and heavy daytime work load I cannot compete with Don's excellent images and productivity. Nevertheless, I post the meager result of the first two hours of star watching since my previous post http://www.cloudynig...lery/?p=6601977 in May. This is to heed my own words that an image is worth more than thousands of words and, I hope, may inspire more forum members to post images. Even if they were made under less than ideal conditions.
This is a narrowband OIII + H-alpha image of the Dumbbell Nebula M27 taken with my Lodestar X2C and LodestarLive v.0.11 through the haze, high clouds and light pollution of the Seattle skies at 3/4 full moon.
It was a day of hazy sunshine and, when it got dark enough at 10:30pm to align my mount, only about 50 of the brightest stars were visible to the naked eye. So I live-stacked (using averaging) six 20 sec frames in LodestarLive. This is the double of the three that I usually mean-stack. Still, at full resolution, the noise resulting from the poor transparency of the air is still visible. I manually adjusted the contrast of the three color channels to keep the red of the H-alpha from overwhelming the more subtle teal of the Oxygen III, which I like. (I can provide images with more red for those, who prefer that.) This also keeps the central star faintly but still visible.
The telescope used was a Meade 10" SCT focally reduced to about f/4. The only difference to the setup that I posted last year http://www.cloudynig...etup/?p=6210387 is an added filter drawer between the flip mirror and the camera.
The careful observer can notice the path of a single hot pixel just above the "FL1000mm" subscript. This corresponds to the drift of the imperfectly aligned mount from the ideal during the total of 2 minutes that it took to capture the six frames. This connects to Nytecam's thread http://www.cloudynig...-imaging-works/ on drift scan imaging and illustrates how state-of-the-art software can compensate for shortcomings of the mechanics of a setup. Without the excellent frame alignment routine built into LodestarLive all stars would have the same lengths of trails and the nebula would be a barely recognizable blur.