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Old 28-10-2011, 02:15 PM
darbyvet (Carl Darby)
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jupiter 10/24/2011

Finally a break in the clouds after 2 weeks of rain.Seeing was OK.Had trouble getting good focus as usual.
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Old 28-10-2011, 02:26 PM
Poita (Peter)
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Focus doesn't look that far off, lots of nice detail there, what is your focussing routine?
How big is jupiter on the total image with the powermate 2.5x? (i.e. how cropped are those images displayed?)
Thanks for sharing, this is the only views I'll get until this stubborn cloud moves on.
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Old 29-10-2011, 12:52 AM
darbyvet (Carl Darby)
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Thanks Poita,
my focusing routine is usually to determine the inner and outer limits of focus and then reduce gamma to 50% and visually try to pick a spot on Jupiter to judge focus.When I think I have got it right I run a 30 second capture and then process it through reg6 to see how much detail I get. In this case I couldnt get much detail regardless of changing focus so either my seeing was too bad or my scopes collimation is off again. I do carry my scope in and out for each session since my old scope got waterlogged.I am also focusing manually and my crayford focuser struggles to handle the weight of my imaging train and sometimes moves during capture.I am looking at a moonlight focuser with a stepper motor on it.

The RGB images are combined in Winjupos and are cropped by this program. I will post some of the separate channel pics so you can see how big JUpiter is with a c11 and 2.5 powermate-I would say the image fills about 1/3 of the width of the frame.
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Old 29-10-2011, 05:51 AM
Poita (Peter)
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Thanks, that would be great to see some of the separate channel pictures.
Which camera are you using?
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Old 29-10-2011, 06:31 AM
darbyvet (Carl Darby)
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I use the DMK 21 618 camera, televue 2.5 powermate, astronomik filters
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Old 30-10-2011, 04:13 AM
darbyvet (Carl Darby)
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Here are the r g and b channels and complete image from 10/08/2011.You can see that Winjupos crops the image. The r g and b channel images show how big Jupiter looks in live view with the setup I have.
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Old 30-10-2011, 10:01 AM
Poita (Peter)
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Great! I've been tossing up which power mate/barlow to buy for the 10" SCT, it looks like a 3x or 2.5x will be about right.
Thanks again,

-Peter
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