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the hardest part is to find a suitable guide star
Thickness of Filter Lens: 2
According to the introduction of technical documents
It saves time
The pairing can be one with multiple or one more
Player One S-Series 1.25 inch ERF Filter - Dark Clear Skies Astrophotography Telescope the hardest part is toPlayer One S Series 1. 25 inch ERF Filter SKU: ERF125 Category: Filter and Wheel Description: The Player One S Series 1. 25 inch ERF Filter utilizes high quality optical glass substrate and multi layer composite coating technology, ensuring excellent optical performance for astrophotography. The ERF filter is an assistant filter specifically designed for the Quark Chromosphere (Ha version). Its purpose is to reject excess energy and extend the
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