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Author Topic: Cold Weather Imaging  (Read 790 times)

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Offline chris.bailey

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Cold Weather Imaging
« on: 14:45:36, 27 December, 2014 »
As temperatures drop away, there are a few things to consider in an imaging session.

1) Give everything plenty of time to cool down if the telescope is being moved outdoors. Scopes can take a couple of hours to fully equalise, big mirrors even longer.

2) If using dew heaters, get them on early so that the heat generated becomes part of the thermal equilibrium of the optical tube. If heater power needs to be adjusted at any point, be ready to refocus a short while later.

3) Keep an eye on the temperature and be ready to re-focus if it drops more than a couple of degrees. This will be very scope dependent but metal tube refractors might need to be refocussed for each degree drop in temperature.

4) Lift any sort of battery off the ground and if possible insulate it. Bubble wrap can maintain a higher battery temperature and therefore useful life.

5) Check all bolted connections for tightness. Its amazing how things can work loose through repeated cycles of heating and cooling. Non-slip washers or even a drop of thread lock can help.

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