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Old 26-04-2007, 07:17 AM
jase (Jason)
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Join Date: Sep 2006
Location: Melbourne, Victoria
Posts: 3,916
The use of a heater is not really related to your location. It comes back to the temperature dew point to keep dew off the front objective or corrector plate (SCTs). The shield will assist in reducing stray light entering the OTA. If you are doing a lot of work close to zenith, then the shield will not be very effective at reducing dew. In such cases, both heater and shield would be recommended.
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