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Amazon.com : SVBONY SV193 Focal Reducer 2 Inch 0.8X Field Flattener Telescope Accessory for SV503 80mm F7 ED Telescope : Electronics
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SVBONY SV193 2inch 0.8x Focal Reducer /Flattener for SV503 80mm ED Refractor ota 714559021590 | eBay
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