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Ah, I had it in my mind you had a cooled 294.
You should still be able to do a minute or so exposure without too many dramas with hot pixels spoiling the show. I assume that the gain levels are the same as the cooled ones. If not, unity gain is 120 on the 294MC Pro and for a longer exposure I would use the equivalent if it is different on the non cooled version. I use it in the long exposures as for me it provides the best compromise between quick capture and linearity of response.
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