Dew on sensor help please
Posted 15 August 2014 - 12:04 AM
Posted 15 August 2014 - 01:42 AM
Have you tried a cooler box such as the one made by Gary Honis?
I've used one in humid conditions and you have to put a filter on the front of the 2" adapter and then heat the 2" adapter with an anti-dew strap so the heat gets to the filter.
The desiccant packs in the box absorb any moisture in the box when it is sealed up.
I've never had a problem with the sensor dewing up if you keep everything sealed.
I've only had a field flattener dew up the first time I used it because I didn't put heaters on it.
Posted 15 August 2014 - 05:03 AM
Posted 16 August 2014 - 08:57 AM
Since you have a cold-finger camera, you don't need a cold box. Putting a box around the camera with desiccant in it won't help either. The desiccant will dry the air in the box, but the sensor is in the camera aiming out a tube which is exposed to the night air.
Putting a clear filter in front of the camera should do the trick. It will isolate the air in the camera from the outside air. You can then put a dew strap around the part where the filter is and that will keep the filter free of dew.