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  #21  
Old 23-10-2014, 10:28 PM
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SkyViking (Rolf)
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That looks superb, really impressive work with a DSLR! And the colours are very good. Pushing your equipment to the limit is the way to go
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  #22  
Old 25-10-2014, 08:40 AM
Ross G
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A great looking photo Richard.

Amazing work!

How low does the cooling on your camera go?

Ross.
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  #23  
Old 25-10-2014, 12:08 PM
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rmuhlack (Richard)
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Thank you all for the encouraging feedback.

From a tech perspective, i'm keen to push the limits and in this respect the benefits of a permanent setup with automation have certainly revolutionised my imaging, as now all I have to do is queue up the targets and SGPro takes care of the rest (GoTo, plate solving, auto meridian flips, auto focus etc). In the morning all I need to do is close the obs roof - too easy!

All this makes it so much easier to rack up the subs on a target, which seems to pay dividends when using a DSLR, especially if the goal is to "go deep". The cooling mod also helps a lot, as now I can take longer subs without having signal swamped by thermal noise. Temp regulation also means that my subs and darks are well matched, resulting in better calibration and smoother images.

Speaking more generally, working as researcher and now more recently in higher education i'm passionate about 'discovery' and science communication (particularly to young people), and that's the inspiration for me in projects like this one: to catch a glimpse of the scale and abundance of our universe and to share that with family and friends (and perhaps even their friends and children) - that they might be also inspired by discovery and the wonder of our universe.

Last edited by rmuhlack; 25-10-2014 at 09:12 PM.
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  #24  
Old 25-10-2014, 12:15 PM
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rmuhlack (Richard)
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Quote:
Originally Posted by Ross G View Post

How low does the cooling on your camera go?
Initial testing showed the max delta T to be around 25-30C below ambient (Temp regulation is via a simple on/off thermostat, with a temperature sensor positioned next to the sensor as part of the mod). However that typically will take the sensor significantly below the dew point which results in heavy condensation (despite having fitted a nichrome dew heater wire to the front of the sensor as part of the cooling mod). Because of this I have been operating the camera during winter and early spring at a regulated set point of 10 C. This has been above the dew point, but still substantially lower than the typical operating temp of the sensor during long exposure imaging. I may look in the future to see if I can fit a dessicant pack to the internals but for now the current setup seems to work okay.

Last edited by rmuhlack; 25-10-2014 at 06:37 PM.
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