Dear All,
Perhaps like most of you I currently use a red, dimable, LED torch for viewing my star charts etc. Having read these two discussions, I am absolutely unsure which in fact would be better? I am not an expert and there seems to be genuine disagreement.
See particularly:
http://www.astromax.org/activities/members/kniffen.htm
and
http://stlplaces.com/night_vision_red_myth/
regards.