Illuminated Reticle Eyepieces
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The best illumination source is a red light-emitting diode, or LED. It consumes much less power than an incandescent bulb, and the red light helps preserve your eyes? dark adaptation. Most illuminated reticle eyepieces available today are wireless, powered by tiny internal batteries, usually type SR-44. Other models, however, can be plugged into an external battery pack or a telescope?s drive corrector or power panel. While the dangling wire is less convenient, you won't have to worry about batteries dying in the middle of a photographic session. |
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