02-17-2018, 03:21 PM
What do sextant filters filter?
I think this is an important question when looking at the sun. If only visible light is filtered, my pupil widens and lets all ultraviolet through, like with low quality sunglasses. This will harm my eye.
Mine is a second-hand Freiberger sextant - I cannot find any specifications. Does anybody have any information?
Regards
I think this is an important question when looking at the sun. If only visible light is filtered, my pupil widens and lets all ultraviolet through, like with low quality sunglasses. This will harm my eye.
Mine is a second-hand Freiberger sextant - I cannot find any specifications. Does anybody have any information?
Regards