richardlawler

Have you tried Starlight Live? I believe it uses a whole different driver. You can download v. 3.3 from the Starlight Xpress site. https://www.sxccd.com/ultrastar-and-ultrastar-c

Thanks Paul. I forgot that with the 3.3 exposure control I can now go down to 1ms. I guess darks encapsulate bias as long as the exposure is the same as the light frames. So I should be good if I standardize on an exposure time for most of my images (as AKB suggests above) and the temperature doesn't vary too much. Flat fields might still be helpful, depending on the optics. But a few experiments with various optical configurations should determine if there's anything to gain. In spite of my desire to post-process, I'm really trying to keep it simple. I've learned the hard way that it's easy to get lost in the details with astro imaging. By focusing on EAA I'm able to keep it fun and interesting and thus not get bogged down.

Thanks, that's exactly the sort of information and experience I'm looking for. I've been trying out Nebulosity, and it looks like it can do the sorts of things I want to do "the morning after" with the FITS files captured from Starlight Live. I can't get Nebulosity 4 to see the Ultrastar C camera from the Mac. (I've not tried it on a PC.) I don't know if that's a bug or just a gap in the supported cameras. But it's probably not necessary with Starlight Live doing the image and dark frame capture. Although Starlight Live doesn't capture bias or light frames AFAIK.

And this command too: open -a StarlightLive --args -load-image-rggb ~/Pictures/Astro\ Photos/Bodes_35x15s_median_2017.4.21_09.25.28.fit Note the full path and file name are required for the image file.

Update: I found this command worked: /Applications/StarlightLive.app/Contents/MacOS/StarlightLive -load-image-rggb Bodes_17x15s_median_2017.4.21_00.17.34.fit

Hello, all. I acquired an Ultrastar C for EAA last fall. (I only got a few chances to use it over the winter, but we got some desperately needed rain instead. So that's ok.) The Ultrastar C has been astounding on the few evenings where the fates have yielded to properly working equipment and clear skies. I'm looking for pointers to tools and techniques for post-processing the color FITs image stacks captured from Starlight Live. I'm on a Mac so that limits some of the software options available. The docs for Starlight Live say there is a command line option ('-load-image-rggb') to reload a color FITs file into the program. Does this work from a Mac command line? Are there any other Mac programs that can read the Bayer RGGB color FITs files exported from Starlight Live for manipulation. Or something that can demosaic and export the files for manipulation in Photoshop? Maybe Nebulosity4. TIA. - Richard