Parfocal filter test #1

December 05, 2011 - I always wondered this, but as I didn't have a motorized filter with readable steps (until now) I wasn't able to do any...
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Firing back up the blog Staunton River State Park, an IDA Dark Sky Park in our backyard Comparing NB filters Step by Step processing of the Orion Nebula Bringing out the dust A full week of astrophotography in the Haute-Alpes, France Blogging fell by the wayside Parfocal filter test #1 Beta Actions available for testing Nikon D7000 for astrophotography: Review
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