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Originally Posted by matt
Dennis
Do you think the dew heater had an impact on your star tests?
Yours shows a brighter outside ring on your image on the left, and a few other slight variations.
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Hi Matt
I've not yet given serious thought to the (adverse) affects of the dew heater, as my prime objective has been to keep the optics free from dew and I have sacrificed everything else to achieve that goal.
However, Bird, Mike, DP and others have published some very important findings here, showing the effects of unwanted heat in the system, so I will shortly begin to give this area some serious thought.
When I first posted these images, I think Mr. Ponders did suggest the wavy outer ring was probably the result of the heat from the dew strip?
I guess that I have been pretty lucky in having what appears to be a reasonable set of optics, along with periods of good seeing, so I’ve not had the need to investigate much further.
Cheers
Dennis