Test image with the IDAS type IV UIBAR as the ERF, and the original PST BF photo

Andy Dodson | all galleries >> Solar Photography >> Evoloution of my Ca K filter > Test image with the IDAS type IV UIBAR as the ERF, and the original PST BF

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22-JAN-2013

Test image with the IDAS type IV UIBAR as the ERF, and the original PST BF

The type IV IDAS UIBAR filter worked as an ERF, presumably behaving as the specifications of the spectral response curve showed on the Hutech website. At this stage I was still using the original 5mm diameter blocking filter from the original PST and so the vignetting at the corners was severe. Time to look for a replacement BF.

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Date/Time	22-Jan-2013 18:26:25
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other sizes: small medium original auto

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