Their website says:-
"Each 100° Series Nitrogen-Purged Waterproof eyepiece is internally sealed and purged with inert, dry nitrogen gas to prevent internal fogging, to halt the intrusion of fine particulates and fungus, and to maximize the life of the internal coatings.To make sure, every 100° eyepiece is tested by submerging them down to 1 meter of water for 30 minutes."
Here is the page on the 14mm 100 deg:-
http://www.explorescientific.com/eye...gree_14mm.html
There is no mention there of a 20mm version, so interesting that Starizona does have it listed. I wanted to see how heavy the 20mm is!
I suspect it is still in final design so they don't know as yet. They offer the $100 off special until Feb 2010 at the moment - makes me think it is not shipping for some months yet.