Thread: views through 2 inch oIII filter with possible spores present.
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Old 20-06-2007, 08:49 AM
ausastronomer (John Bambury)
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Join Date: Mar 2005
Location: Shoalhaven Heads, NSW
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Peter,

What make of filter is it? The reason this is important is that some filters are surface coated and some are "sandwich" filters, which are infinitely more durable.

CS-John B
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