A faint star that falls exactly under a red ring is easy to overlook. With a Telrad pulse generator, the rings flash instead of constantly turning on and brandoff, so you can still see that star. This way, you can find an object more quickly in the place you expect it to be.
The generator is intended for the Telrad finder with base, The finder with three red rings that allows you to scan the sky. Especially useful if you are using a map and the Telrad weak deep-sky objects looks up.
Turn off the Telrad while you are installing the generator, and turn it back on after you have finished, so that the battery does not run out unnecessarily. Turn the brightness of the rings as low as is comfortable; this will help your eyes become more accustomed to the darkness.
It covers the window on humid nights, then it helps the Telrad dew cap plus.
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