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Based on experience, an external metal surface does reduce condensation internally. Just be careful water is not seeping into ribbon connectors (in the cooler regions of the camera) corroding the contacts. Might last a lifetime depending on the design or it might just pack up after several hours use.
On temperature sensors. Cold finger temp is close enough for our purposes. If you are using darks temperature consistency is more important.
While I think of it. If you are imaging at say 0C to -5C or even lower over a night, with or without temperature control, you can omit darks. Just use a Superbias and flats. Temperature is academic in this case.
You may not get terrific results with a regular master bias. Superbias produces much better results. Take flats and bias at the camera's lowest ISO to further limit noise.
Last edited by rcheshire; 11-05-2017 at 06:40 AM.
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