This sounds like very, very interesting news.
Originally posted by DeadJohn Use of a hood can reduce dew because it reduces the amount of moist airflow over the lens. That applies more to telescopes and telephoto lenses that can use a deep hood, than to wide angle Milky Way lenses.
Yes, the big, exposed front element of a UWA/fisheye lens is a dew nightmare. My Rok 8mm needs a blower which I haven't taken the time to build yet.
I also have a newtonian telescope, but all the dew collects on the barrel, not on the mirrors, so I just let it in a ventilated area for a few days after use.
That's the reason most telescope arrays are on top of dry, deserty locations. Atacama being one of the driest.
If this feature really is getting incorporated into the lens, then I'm taking my hat off to Pentax. They'd be stepping up their astro game, which already makes their cameras the go to (astro tracer), to a whole new level.
One would certainly need a few spare batteries, since I think that would drain some current, but it's easier than buying and lugging an external heater, which still requires a battery. And it would be all incorporated into just one system. Bravo!
Rainforests, mangroves, swamps and wetlands here we come!
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