{"product_id":"svbony-sv158-extension-tube-2-inch-optical-length-55mm-total-length-90mm-extension-tube-for-telescope-90mm","title":"SVBONY SV158 Extension Tube 2 inch Optical Length 55mm Total Length 90mm Extension Tube for Telescope (90mm)","description":"\u003cp\u003eWhy do you need this? Simple, telescopes are typically designed to reach focus at the distance that will include a right angle mirror. SV158 extension tube allows you to extend the focal point without additional loss of light and distortion of another bit of optics Both thumbscrews it is well made with two screws for a nice tight fit, the heads of both are quite large and easy for quick tightening or loosening. Filter thread on bottom side The threading is on the inside so the filter when attached will not cause any problems and will fit into the focuser easily Anodized in black The whole SV158 2  extension tube is made of metal and the surface is completely black anodized. Greatly extended its service life Specifications: Material: Aluminum Alloy Specification:2  Extension Tube L=90mm Dimensions (mm):?59*90 mm Weight (g): 134g Package Includes: 1  SVBONY SV158 2   Extension Tube\u003c\/p\u003e","brand":"SVBONY","offers":[{"title":"Default Title","offer_id":45183698042995,"sku":"WBEEAB083TW45X7","price":23.86,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/1958\/6419\/files\/51OsnHwCdUL.jpg?v=1783412855","url":"https:\/\/slickpurchase.com\/products\/svbony-sv158-extension-tube-2-inch-optical-length-55mm-total-length-90mm-extension-tube-for-telescope-90mm","provider":"Slickpurchase","version":"1.0","type":"link"}