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Old 02-11-2007, 06:05 AM
lly
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DSI meade problem / image with strips

hi
I use a DSI pro camera and encounter some problem with images.
on my pictures I see some regular and parallele lines (allways same direction).
Is someone can help me with this?
thanks

Laurent
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  #2  
Old 02-11-2007, 09:57 AM
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[1ponders] (Paul)
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Laurent.

Are you using the Meade software for capture or are you using something else?

the lines you are seeing are an interlacing artifact. If you are using the DSI program there should be an option built in to deal with the issue.
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Old 03-11-2007, 10:36 AM
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Someone just pointed some lines out to me on my first test shots of the moon, 8" F5.6, with the DSI Pro using Meades Envisage.

Haven't seen anything in the documentation how to get rid of them.

Early days yet.

Alexander
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Old 03-11-2007, 12:03 PM
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Hi
In the Envisage software there is a setting once you press the CNTRL button, called Line Delay. For the Pro I have found between 2-6 is a good range. For the Pro II - seems best at 2.

I've seen lines at different times and I believe they are also due to other factors

1. Appropriate darks - if you take darks at one temp and the temp changes during an imaging session you can see a range of effects. I take lots of darks at different temps and keep a library of them. Keep the dark temp limit setting below 5 to reduce variation

2. USB 2 - I have had problems with noise and striping using USB 1.1. I stil get problems with USB 2 from time to time if I run other things off USB at the same time. A lot of folk recommend getting a USB 2 hub with separate power source

3. Exposure time - you will see far less stripes and other noise for that matter if you take longer (or many shorter) exposures


Hope this helps
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Old 04-11-2007, 09:39 AM
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Thanks for that. The lines were on prime focus and 2x barlow moon shots taken with an 8" F5.5 and DSI Pro with filter. Sometimes the are there at other times not. Mind you, this is my first foray into CCD Imaging.

Alexander
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Old 05-11-2007, 09:47 PM
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Have a read of this thread. You can remove the interlacing effect with software (such as adobe photoshop, or nebulosity).
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Old 06-11-2007, 10:55 AM
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Quote:
Originally Posted by Kal View Post
Have a read of this thread. You can remove the interlacing effect with software (such as adobe photoshop, or nebulosity).
Thanks, someone else pointed that out to me and the problem is fixed
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