During my lead up to an observing session in Summer I take small steps to assist in my dark adaption. While I don't go overboard, a typical evening would be - say from 8pm onwards no watch TV or use a computer. Set up the scope and start cooling down, turn off all house lights in the house and sheds and only use my trusty red torch. I've read of observers wearing eye patches but for my I find those methods excessive.
The brightest light I work with is the Arvo Navis on the dimmest display setting and a dim red torch - probably typical of most amateur astronomers, right?
So, for the first time last night I decided to use me iPad assorted apps to assist me at the scope. Well even pre-setting the apps to a red screen and iPad brightness to minimum, my dark adaption was shot to pieces!!
I was trying to observe some faint DSO and it completely ruined my observing session!!!
After about 30 minutes I tried to use a friend's Windows tablet that she had set to minimum brightness. Nope, no good. Same result!!!
I understand you imagers need computer screens for your imaging at the scope and perhaps complete dark adaption may not be critical, but for visual observers, how do you use these devices???? I'll be sticking to my books, charts and a red torch from now on!
Cheers,
Russ59