73P/Schwassmann-Wachmann 3
Do you know what the cause of this very bright screen during capture ?
| DSI colour with a 135 mm lens. |
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| 23.11 UT 4th May, 2006 This is a series of 50 images at 11 seconds each. Again it was misty which seems to be a normal state of affairs these days. Images captured in .bmp format and stacked in Registax. |
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| 23.24 UT 4th May, 2006 This again is a series of 50 images at 15 seconds each. Seems I have "dust bunnies" somewhere in the optical train. |
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| This is a stack of the above 2
images which shows just how far the comet travels in a very short
time. This shows the dust on the chip or 135 mm lens even better
which reuins a nice image. |
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| Here I have tried to get rid of
the "dust bunnies" using Gimp but I did not have too much
success. I tried the idea of duplicating the layer, then
blurring the top layer so that no stars or comet was seen. Then
subtracting the blurred image from the comet image. |
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| Here is version 2. Having seen this dust donut or whatever "pet name" you have for these little pest I had to do something about it so here I made a synthetic dark frame using iPrep. This image I used the subract feature of Gimp to try and get rid of the dust bunnies. |
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| Here is version 3. In this image I used the same dark frame but this time I used the Difference feature to try and get rid of the dust bunnies. |