Solar Imaging help
Hello Stu,
I am imaging with a Coronado 60-mm DS instrument and project the image into an ImagingSource camera with a 640X480 px chip, using an Hyperion 17-mm eyepiece plus spacer rings. One can, alternatively use a Barlow lens to achieve higher magnification.
Avi's of 400 frames have been my recent choice, of which I would stack 30% in Autostakkert. You can also download 1000 or 2000 images as others have suggested. Depends on storage space etc.
The resulting image is then opened up in Registax and the wavelets adjusted. I try to do minimal work here and save the adjustment numbers to apply to further images taken during the same session.
When exposing, use of the histogram is advised for surface images so that close to the 256 levels are utilized.(2^8 byte) I try to keep the gain of my camera at about 750 with an appropriate shutter speed (often 1/145s in my case)when looking at the histogram.
One cannot use the histogram when exposing prominence images. 1/45s with the gain adjusted so the prominence has no solid white features has worked well for me.
Images are transferred into Photoshop; surface copied and pasted on to the prominence. Using "difference" and the move tool, adjust until aligned. Back to normal mode where I apply a black mask to the top surface image and then bring the underlying surface through the prominence image. Crop, Merge down ,save and action/colour/save for final images.
I trust that this may help you
Kind Regards
Arthur
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