As with many Gadget Freak entries, this one was developed out of necessity.
Eric Chesak takes deep-space photographs. The process can require 10 to 12 hours of focus on the object being photographed. Over that period, nighttime temperatures can swing enough to throw an aluminum telescope out of focus. The astrophotography industry has gadgets designed to compensate with complicated focus alternations. Or you can go outside and refocus the telescope every 30 minutes.
Chesak had a better idea. He decided to get to the source of the problem. He created a heating pad system to keep the telescope at a uniform temperature throughout the process.
Click the image below for a slideshow on Eric Chesak's telescope thermal focus management system.
Eric Chesak's telescope thermal focus management system is made up of three main elements: the heater, the power and temperature control system, and the thermocouple for temperature feedback.
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