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Dewshield Experiment part 1

Started by Jarad Schiffer, 02/05/2004 03:22AM
Posted 02/05/2004 03:22AM Opening Post
Okay Vladimir, I performed the experiment you suggested. I set up my ED-80 with a temperature probe inside the dewshield, as close to the objective as I was willing to go without risking scratching it (I estimate about 1/4" from the objective). The inside temperature is measured at the probe, the outside temperature at the metal fins at the bottom of the display. The top number is the inside temp, the bottom number is the outside temp. Note that at the beginning (inside my heated house, with everything at equilibrium) the temperature inside is showing slightly higher than outside. I can think of no reason for this, and the difference may indicate the limit of sensitivity of the instrument. Here is a picture of the setup:



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Jarad Schiffer's attachment for post 12894
Posted 02/05/2004 03:26AM #1
I set the scope outside at 7:48 PM, pointed at the sky at about a 40 degree angle up (I just left it pointing basically north). Here is a picture of the position outside (the car isn't mine, my in-laws were over to watch West Wing with us....):



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Jarad Schiffer's attachment for post 75961
Posted 02/05/2004 08:47AM #2
What was the supposed possible outcome that was, or was not shown? That's a pretty vestigial dew shield you gotta admit. I think a big dewshield with end baffle like a TMB or a wholly flocked dewshield like an AP has might read differently.

Regards, and thanks for sharing the pics.

Mike