Friday, 27 August 2010

Dark adaption 3

The perfect astrotorch puts out a pure red beam that is dim enough not to harm dark adaptation.

A too-bright red light can be nearly as harmful to night vision as a white light.

Get one with a strap, a dimmer control, and a sturdy housing

Source: Getting the Most from Your Schmidt Cassegrain or Any Catadioptric Telescope - Rod Mollise

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