A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Paul Dolkas
Date: 2019 May 14, 04:03 +0000
Well, when I go scuba diving, we always spit on the inside of the mask…
Seriously, there are a number of compounds out there that they sell for the insides of ski goggles & such. NASA uses a dilute solution of no-tears baby shampoo for the insides of the space suit helmet ever since one of the astronauts got temporarily blinded by a drop of the old anti-fog compound they were using. Personally, if it were my Cassens & Plath, I would just use a drop of diluted shampoo. Can always clean it off if it doesn’t work.
From: NavList@fer3.com [mailto:NavList@fer3.com]
On Behalf Of Tony Oz
Sent: Monday, May 13, 2019 10:17 AM
To: Paul Dolkas
Subject: [NavList] Re: Fogging Optics
Almost a year ago Rob Hansen asked how could one prevent optics from fogging. Seems nobody replied.
Yesterday I tried an evening twilight sighting and was in difficulties because of the mirrors fogging. I wanted a Moon-Pollux lunar...
Any hints or advises?