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Posts tagged ‘flashlights’

Astronomy Hints #18: Do I need a red light flashlight?

There are many factors that can effect the quality of a telescope session: clouds, turbulence, haze, light pollution, moonlight, and so on. Most of these the astronomer cannot do anything to change, but one of them – night adapted vision, you do at least have some control over. You cannot control everything your eyes do, but you can help them a lot.

Many beginning astronomers often make a common mistake of going from a brightly lit house with their telescope out into the darks skies and start viewing through their telescope immediately. This can be a bit unsatisfying if you are looking at dim deep space objects. The will be extremely faint simply because your eyes are not adapted to the darkness. This isn’t just about the pupils of your eyes dialating, either. (more…)