SCT DIY Dew Heater (aikd)

Contains: Gear

SCT DIY Dew Heater

Revision title: DIY SCT Dewheater Dewshield Mounted

SCT DIY Dew Heater

Revision title: DIY SCT Dewheater Dewshield Mounted

My answer to the dew problem. This DIY dew heater is made up of a plastic garden rubbish bag, inside there is a leather 40cm x 40cm 12V car seat heater mat and a double layer of insulated bubble wrap on one side of the mat. Two self adhesive Velcro type tapes hold the composite on the OTA. Tested in 2C, 85% humidity with dew point almost there, air was thick as, the photographing Canon DSLR had to be blow dried before use. 12V 9ah SLA lasted a bit over 3 hrs, corrector plate remained nice and dry through the entire imaging session (of NGC 2997). Total cost about AUD 100 including the battery.

After plenty of testing placing this dewheater on the standard Celestron C8 flexi dewshield is the optimal location for dew prevention. It also provides the counter weight along the Dec, for Celestron's chunky OAG.

In its second winter season with extra high humidity (90%), the composite covering remains good as new. Also to mention this dewheater does not require any dew controller.

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Title: DIY SCT Dewheater Dewshield Mounted

Description: Post testing optimal location

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SCT DIY Dew Heater

Revision title: DIY SCT Dewheater Dewshield Mounted

SCT DIY Dew Heater

Revision title: DIY SCT Dewheater Dewshield Mounted

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SCT DIY Dew Heater

Revision title: DIY SCT Dewheater Dewshield Mounted

SCT DIY Dew Heater

Revision title: DIY SCT Dewheater Dewshield Mounted

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