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Old 09-12-2018, 05:27 AM
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NorthernLight (Max)
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NorthernLight is offline
 
Join Date: Sep 2008
Location: Auckland, NZ
Posts: 343
Hi Raymo, I think the use of filters changes everything. I’m regularly taking 400-600s exposures. When I used a 2.5x powermate and a UHC Filter I had to go to 15min exposures (on Southern Pinwheel). My camera sensor seems to hold its temperature reasonably well usually at around ambient. It goes up during rapid, short exposures by a degree or 2. Long exposure is not so much an issue, since exposures are delayed by dithering. This allows the sensor to calm down. My batteries are in a power grip not inside the camera chassis. I think the heat from the discharging battery heats up sensors for other people. So I recommend to move to external batteries and allow time between exposures to let the sensor cool.
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