{"product_id":"artesky-prolunga-m54-9mm","title":"M54 Extension Tube Artesky 9mm","description":"\u003cp\u003e\u003cstrong\u003eThe Artesky M54 extension tube 9mm\u003c\/strong\u003e is a spacer ring with M54x0.75 male\/female thread, used to adjust the back focus in the optical train.\u003c\/p\u003e\n\n\u003ch2\u003eWhat it's for\u003c\/h2\u003e\n\u003cp\u003eIt is fitted between two M54-threaded components (rotators, large-format cameras, focal reducers) to add exactly 9mm of distance, achieving the back focus required by the optics.\u003c\/p\u003e\n\n\u003ch2\u003eWho it's for\u003c\/h2\u003e\n\u003cp\u003eEssential for astrophotographers using M54-threaded cameras who need to fine-tune the sensor-to-optics distance, especially with reducers or field flatteners that require a specific back focus.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eThread\u003c\/td\u003e\u003ctd\u003eM54x0.75 male\/female\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLength\u003c\/td\u003e\u003ctd\u003e9 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eBrand\u003c\/td\u003e\u003ctd\u003eArtesky\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Artesky","offers":[{"title":"Default Title","offer_id":57943640408395,"sku":"AKM549","price":20.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/20170703145247_1636_7695016a-39c1-4f09-a8e3-2b6f5313b75f.jpg?v=1789993845","url":"https:\/\/adriasky.it\/en\/products\/artesky-m54-extension-tube-9mm","provider":"Adriasky","version":"1.0","type":"link"}