Old? Solar Energy Rejection Filter for Televue NP101

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SolarBill
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Old? Solar Energy Rejection Filter for Televue NP101

Post by SolarBill »

Hi all.

I have what I believe is an energy rejection filter for a TeleVue NP101 refractor. There is black metal disk that screws into the front end of the dew shield. There is a smaller diameter "hole" in the center of that disk. It has a darkish red glass filter? in there. And there is a another threaded black metal disk that screws over that should one want to cover it.

So who made this?

Thanks very much for any input!


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marktownley
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Re: Old? Solar Energy Rejection Filter for Televue NP101

Post by marktownley »

Welcome to the forum!

Sounds like an ERF, probably for a Daystar...

Are you looking to do something with it?


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