Parks ALP (anti light pollution) filter for SCT telescopes. Great for use in moderate light pollution areas. This is a 2" dedicated Schmidt Cassegrain filter that threads onto the rear cell. Similar to an Orion SkyGlow broadband filter # 5656 but this one is from Japan and definitely much higher quality. Condition is very good and has caps for both ends.
$56.00 shipped priority mail CONUSA.
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