{"product_id":"takahashi-rd-qb-0-73x-new-reducer-for-baby-q","title":"Takahashi RD-QB 0.73x New reducer for \"Baby-Q\"","description":"\u003cp\u003eThe Takahashi reducer RD-QB 0.73X is the newest reducer for the FSQ-85EDX telescope. It features 4 elements and 2 groups and provides a 0.73X reduction factor. When used with the FSQ-85EDX, it provides an effective focal length of 330 mm and a focal ratio of f\/3.9. The correction provided to field curvature is similar to that provided by the FSQ-85 flattened 1.01x. The resulting image circle is 44 mm in diameter.\u003c\/p\u003e\n\u003cp\u003eOTA side mounting thread - M72 P=1.0\u003c\/p\u003e\n\u003cp\u003eCamera side mounting thread - M55.9 P=0.75\u003c\/p\u003e\n\u003cp\u003eMetal Back - 72.2 mm\u003c\/p\u003e\n\u003cp\u003eInternal thread for 58 mm filter \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eIt is also advisable to obtain the CA-35 (SKY-90) TKA35201 to aid in mounting your camera at the correct backspace. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"TAKAHASHI","offers":[{"title":"Default Title","offer_id":46718087659692,"sku":"TKA37580","price":680.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/8073\/3868\/files\/a4d7d77a-599c-4426-ab90-fb926c048006.jpg?v=1783109941","url":"https:\/\/landseaskyco.com\/products\/takahashi-rd-qb-0-73x-new-reducer-for-baby-q","provider":"Land Sea \u0026 Sky","version":"1.0","type":"link"}