120mm Daystar or Baader ERF

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Robert Henry 1355
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120mm Daystar or Baader ERF

Post by Robert Henry 1355 » Tue Jul 21, 2015 5:39 pm

Looking to purchase Daystar or Baader 120mm front mounted ERF.

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Valery
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Re: 120mm Daystar or Baader ERF

Post by Valery » Thu Jul 23, 2015 6:50 am

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"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.

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