{"product_id":"artesky-maschera-bahtinov-290-340","title":"Bahtinov Mask Artesky 290-340mm","description":"\u003cp\u003e\u003cstrong\u003eThe Bahtinov mask 290-340mm\u003c\/strong\u003e is an accessory for precise focusing in astrophotography, compatible with telescopes with a tube outer diameter of 290-340mm.\u003c\/p\u003e\n\n\u003ch2\u003eWhat it's for\u003c\/h2\u003e\n\u003cp\u003eIt rests in front of the telescope aperture: pointing at a bright star, an X pattern with a diagonal line in the middle appears on the monitor or sensor. When the line is perfectly centred, focus is achieved.\u003c\/p\u003e\n\n\u003ch2\u003eWho it's for\u003c\/h2\u003e\n\u003cp\u003eEssential for astrophotographers who want precise, repeatable focus at every session — far more reliable than focusing by eye. This oversized version is designed for large refractors and high-end RC telescopes.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eCompatible tube diameter\u003c\/td\u003e\u003ctd\u003e290-340 mm (outer)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eMounting\u003c\/td\u003e\u003ctd\u003e3 locking screws\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":57942803677515,"sku":"AKBAHTINOV-290340","price":39.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/arti-sky-maschera-bahtinov-astrofotografia-105-150-focus-strumento.jpg?v=1744223261","url":"https:\/\/adriasky.it\/en\/products\/artesky-bahtinov-mask-290-340","provider":"Adriasky","version":"1.0","type":"link"}