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Originally Posted by bird
otherwise it'll end up reading part mirror and part air temp.
It's easy to do - just find some waste styrofoam from a parcel and cut out a cap to stick over the mirror sensor.
Weather looks clear here too, and I have my alarm set for 3am, maybe we'll be imaging at the same time ?
Bird
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if i only have two sensors, is it a good thing to try and measure mirror and tube air temps???
or should i just stick to purely mirror?