Color with Mono Cameras and LodestarLive
I have had the pleasure to beta test the new multi-spectral feature that Paul Shears is building into LodestarLive.
Here is the preview thread by Paul http://stargazerslou...ectrum-preview/.
Here are two images made with monochrome cameras and the current test build of LL.
First is the Dumbbell Nebula M27 from yesterday night taken with a Lodestar x2 monochrome camera.
The second one was taken a couple of nights ago with the SX-825 mono. This is a 75% crop of the original capture.
Both images are 5x30sec mean stacks.
The first three frames were captured with an O-III filter and assigned to the green and blue channels. Then two more H-alpha frames added to the stack assigned to the red channel. The minimum would be two frames stacked, one O-III and one H-alpha. I stack more because I like the resulting nice smooth texture. Exposure times are the same as would be with the same filters without the multispectral feature.
Please note that since we are using monochrome cameras, exposure times are shorter than would be with color cameras for two reasons. First, we don't lose light in the micro-filters on the pixels of the color sensor. Second because all pixels of the mono sensor are detecting the light equally. In case of a mono sensor only the yellow and magenta pixels are sensitive to H-alpha light and only the cyan and green pixels to O-III. (Right now Seattle is engulfed in the smoke of the massive forest fires further East. At the time the image was taken yesterday nigh, only the three main stars of the Summer triangle were visible with bare eyes on the entire sky. At 11:15pm even those were gone and I had to call off astronomy for the night. Moisture condenses on the smoke particles as seeds and the whole sky becomes uniform opaque white illuminated by the moon. Due to the smoke, exposure times were probably the double of what they would be under normal conditions.)
An added benefit is that narrowband imaging is not affected by light pollution or moon glare. The moon was up and past first quarter yesterday night. This new feature of LodestarLive makes it possible to produce genuine multi-color images with NB filters.
As far as I know, this multi-spectral, multi-color capability is an absolute first ever in real-live camera assisted amateur astronomy. We are grateful to Paul Shears for his continued efforts to lead the way and make this and other new capabilities available for the entire EAA community.
Please use this discussion thread http://www.cloudynig...d-lodestarlive/ for comments and questions to keep the gallery thread mostly as a gallery of images.