As LRGB image was only a part of field of view SAC8, I combined color image with the grayscale image of SAC8.

This is my first light of SAC8 camera with my Europa Newtonian.
Processing:
1. Preprocessed by AVIDark (elimination of horizontal gradient)
2, Stacked by K3CCDTools and exported to FIT
3, Processed by K3APEX (Digital development)
4, Postprocessed by Loreal (to remove star ears)

Many thanks to Jon Grove for inventing JG modification!

Click the image to see M27 picture with higher resolution (80% of full resolution = 1.2"/pixel).
You can also look at 100% resolution (0.96"/pixel), but the image suffers from rather high noise.

This image is product of combining (sum) the results from 24.10.2002 and 29.10.2002 (see bellow) in MaximDL Demo. The result was a little bit de-noised in Corel PhotoPaint. Then slight brightness-contrast-intensity adjustment. Finally, very small color saturation enhancement was applied.

Click the image to see M27 picture with higher resolution (80% of full resolution = 1.2"/pixel).
You can also look at 100% resolution (0.96"/pixel), but the image suffers from rather high noise.

Another attempt of imaging M27 - with homemade autoguiding system. Unfortunatelly I started imaging too late, so I had not enough frames for summation. I also noticed, that Flat field had to be used, when stronger histogram stretching was applied - it suppresses not homogeneous gain of the whole CCD area.
In this session I was able to focus the image much better (using my homemade electronic focuser).

Processing:
1, aligned and summed in K3CCDTools
2, histogram stretching and gamma 1.20 in K3CCDTools
3, noise reduction in Neat Image
4, adjusted brightness-contrast-intensity in Corel PhotoPaint
5, resized to 50% (80%) and unsharp mask

Click the image to see M27 picture with higher resolution (80% of full resolution = 1.2"/pixel).
You can also look at 100% resolution (0.96"/pixel), but the image suffers from rather high noise.

The new attempt of imaging M27 - with homemade autoguiding system. 40s (!) exposures were possible even without focal reducer. 72 frames of 105 (i.e. 69%!) were usable. The main obstacle was Moon (phase 88.7%, altitude about 30° above horizon), which disabled longer exposures and wiped off dim details of M27. It also caused lower contrast of image. I also noticed that it's better to use "Outdoors" white balance settings - in auto white balance the red color component is suppressed.

Processing:
1, aligned and summed in K3CCDTools
2, histogram stretching and gamma 1.30 in K3CCDTools, saved as PNG
3, low end histogram cut for R channel in Corel PhotoPaint
4, Gaussian blur (0.65 pixel) in Corel PhotoPaint
5, resized to 50% (80%) and unsharp mask
6, adjusted brightness-contrast-intensisty
7, color balance (to supress blue component and enhance red component)

The first test of Steven's Mogg 0.6x focal reducer. Much better results with "faster" focal ratio - better exposure and smaller tracking error.

Click the image to see more pictures of M27 with higher resolution (2.09"/pixel).

Second try with better results. I couldn't decide which result was better: 25s exposure or 45s exposure? Then I get an idea to combine both images. Here is the result.

See the more details about processing M27 images.

The nice planetary nebula. Very hard to capture because of faint structure.