SV209 Field Flattener, 0.8X Focal Reducer, Corrects The Field Curvature and a Wider Field of View, Telescope Accessories for SV550 122mm APO Refractor Telescope

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🌌 Capture the Universe in Ultra-Wide, Ultra-Clear Brilliance!

The SVBONY SV209 is a precision 0.8X focal reducer and field flattener designed for the SV550 122mm f/7 APO refractor telescope. It reduces focal length to 683.2mm and aperture to f/5.6, enabling faster, wider astrophotography while correcting field curvature for sharp, distortion-free images across the entire sensor. Its secure metric 63x1 thread ensures stable, reliable mounting for professional-grade imaging.