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« "The Music of Words" by Richard Sale | Main | Hydrogen Alpha Images- Astrophotography by John Minnerath, Part 2 »

January 05, 2013


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Thanks for sharing your photos. They are truly amazing!

Can you also share some salient details of your processing workflow, e.g., what software you use to handle the stacking of frames to produce your images, and whether any particular features are especially relevant for solar image processing.

I have used Registax to do some neophyte-level planetary imaging, but the sun presents so much image data that the task of creating such detailed pictures as yours seems virtually impossible to me, including the job of creating those seamless mosaic images. So any introductory suggestions you might provide will be greatly appreciated.

Magnificent work! Thanks for sharing it!

Charles I

Thanks for wonderful photos of some serious astronomy.

I managed to observe the transit of Venus from the cottage through an 8" Celestron but have yet to get to the high speed video single image processing stage, and am sure I never will!

John Minnerath

The process of ending up with a finished image from the raw camera feed is long and complicated, too much to try and write here.
Maybe you can get my email from PL and we could go into it more.
Anyway, for Solar work start with white light. The best filter bar non is the Baader Solar Film. I use density 3.8 which is ONLY for photographic use. NO VISUAL use.
I use a camera made by The Imaging Source, the DMK21AUO4.
It has a tiny chip, but can get to 60FPS to beat seeing issues and has excellent resolution.
I run it with Firecapture.
The resulting AVI is fed into Avistack2 for initial processing.
Then sharpening and deconvolution are done with AstraImage, a PS add on.
Final sharpening is done within PS using Smart Sharpen to a radius of .1 pixel.
To combine a number of images into a mosaic I use Imerge. Basically it lets me open up a page with all the images in a semi transparent format which I can rearrange till I've managed to align features, adjustments allow for blending joins.
Except for building a mosaic, it all actually goes pretty fast.



Thanks for the info. It's exactly what I had hoped for, as I recently picked up a used DBK31AF03, and have been testing it to learn how to get it running at its nominal 30 FPS capture rate. I'll check out this imager and Avistack2 as soon as I can get some quality time under the night sky.

I'll admit that I'm still too chicken to point any of my telescopes at the sun with me or a camera at the business end. Old habits die hard, I guess, so for now, I'll just enjoy your solar images and stick to the planets instead.

Great work! Thanks for the information!

John Minnerath

Good camera. Ditch the IC Capture that comes with it. It's a buggy sucker. FireCapture is a freebie and excellent, I've used many and it's the best I've run across.
Avistack has a learning curve, best to download the manual for reference while you get your feet wet.

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