{"product_id":"b0h8m4m3g6","title":"M54x0.75 Telescope Extension Tube Set for Astronomical Imaging Back Focus Adjustment","description":"\u003cdiv\u003e\n\u003ch1\u003eAbout This\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003ePrecision Back Focus Adjustment: This aluminum threaded adapter set includes eight M54x0.75 extension tubes in lengths of 3mm, 5mm, 7mm, 10mm, 12mm, 15mm, 20mm, and 30mm, allowing precise modification of the optical system back focus for accurate focusing with various imaging devices.\u003c\/li\u003e\n\u003cli\u003eStackable Threaded Design: Each extension tube features M54x0.75 standard threads, enabling secure stacking with adapter rings, spacers, and other optical components while maintaining coaxial alignment, offering flexible spacing adjustments for improved image clarity.\u003c\/li\u003e\n\u003cli\u003eEnhanced Imaging Performance: By increasing the distance between the sensor and optical elements, these extension tubes resolve insufficient back focus issues, allowing eyepieces or imaging systems to achieve proper focus while reducing vignetting and image distortion at the edges.\u003c\/li\u003e\n\u003cli\u003eDazzle Proof Internal Structure: The black anodized outside with a matte interior effectively minimizes stray light and internal reflections, enhancing image contrast and purity during long exposure astrophotography or deep sky imaging sessions.\u003c\/li\u003e\n\u003cli\u003eAstrophotography Compatibility: Designed for telescope systems, focusers, field flatteners, and filter wheels, these extension rings require a M54x0.75 interface for reliable connection and system stability, ensuring seamless integration with existing astronomy equipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eOverview\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eBrand : SENECESLI\u003c\/li\u003e\n\u003cli\u003eModel Name : SENECESLIvlh3yb1wzf\u003c\/li\u003e\n\u003cli\u003eObjective Lens Diameter : 1 millimeters\u003c\/li\u003e\n\u003cli\u003eProduct Dimensions : 5.51\"D x 5.31\"W x 1.57\"H\u003c\/li\u003e\n\u003cli\u003eFocus Type : Manual Focus\u003c\/li\u003e\n\u003cli\u003eFinderscope : Straight-Through\u003c\/li\u003e\n\u003cli\u003eManufacturer : SENECESLI\u003c\/li\u003e\n\u003cli\u003eNumber of Items : 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"SENECESLI","offers":[{"title":"Default Title","offer_id":47665087316052,"sku":"SPH-B0H8M4M3G6","price":35.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/3590\/1780\/files\/31xOTeAgk8L._AC_SL1500.jpg?v=1789214121","url":"https:\/\/learnbrightminds.com\/products\/b0h8m4m3g6","provider":"BrightMinds","version":"1.0","type":"link"}