Aluminum Dew shield?

Thanks Dave. I just thought it might because it forms a tube around the lens.

Interesting, what is the benefit of a dew shield made from metal? Is it to do with the 0% absorbtion of water? If so, I would have thought of that as a perk in getting rid of moisture from the air around the aperture.

Seanie.

Interesting, what is the benefit of a dew shield made from metal? Is it to do with the 0% absorbtion of water? If so, I would have thought of that as a perk in getting rid of moisture from the air around the aperture.

Seanie.

I'd imagine the advantage is rigidity. You don't want it sagging and messing with your light path so if you have a big telescope you need a fairly strong dew shield so it can support itself.

Bart.

Absolutely Bart.
Seanie, a metal one does work even though it is not an ideal material for the job, you can always line it with some sort of moisture absorbing material if you wanted. It basically reduces the exposure of the plate to the night sky so slowing down the dewing process.
Having said that, I need 2 kendrick belts and a dew shield to prevents dew for the night, one belt + shield dews after 4+ hours would you believe!!