rogerg
07-01-2011, 02:41 PM
Well, my focal length doesn't really lend its self well to this object, but after taking a quick snap on my way to other objects I got hooked.
I had a lot of troubles that night and last night with dark pixels in my reduced images. Not sure what's going on there. The dark frames seem reasonable but something is amiss. It took a lot of processing to get rid of them, and get rid of a verticle line of shading down the left, presumably an artifact of the nearby bright star.
Even without those problems the image would be somewhat soft, being at 0.86 arc seconds per pixel. But you work with what you have :)
100% size, and only a couple of pixels cropped.
Consdiering all, I'm quite happy with the result, and won't be going back to it for a nother few years I expect (last shot of it with the ST7/LX200 was several years back I think).
Here too, although not any larger:
http://www.rogergroom.com/items/horsehead_nebula_2011
Roger.
I had a lot of troubles that night and last night with dark pixels in my reduced images. Not sure what's going on there. The dark frames seem reasonable but something is amiss. It took a lot of processing to get rid of them, and get rid of a verticle line of shading down the left, presumably an artifact of the nearby bright star.
Even without those problems the image would be somewhat soft, being at 0.86 arc seconds per pixel. But you work with what you have :)
100% size, and only a couple of pixels cropped.
Consdiering all, I'm quite happy with the result, and won't be going back to it for a nother few years I expect (last shot of it with the ST7/LX200 was several years back I think).
Here too, although not any larger:
http://www.rogergroom.com/items/horsehead_nebula_2011
Roger.