1 Baader H-alpha f/3 highspeed filter
Price from £229 • Supplier The Widescreen Centre
Available in a range of sizes, this astrophotography filter is designed for fast telescopes between f/3.4
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Price from £229 • Supplier The Widescreen Centre
Available in a range of sizes, this astrophotography filter is designed for fast telescopes between f/3.4
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Choosing and Using a New CAT: Getting the Most from Your Schmidt Cassegrain or Any Catadioptric Telescope
byRod Mollise