{"product_id":"borg-4531-m42extension-barrel-sbk","title":"BORG 4531 M42EXTENSION Barrel SBK","description":"\u003ch2\u003eBORG 4531 M42EXTENSION Barrel SBK | An M42 extension component\u003c\/h2\u003e\n\u003cp\u003eThe BORG 4531 M42EXTENSION Barrel SBK is an extension barrel identified as M42, rather than a complete lens. Its value is straightforward: it’s the component to look for when an optical setup calls for an M42 extension barrel. That makes it relevant to photographers and astronomy enthusiasts assembling or adjusting a system around this type of part, especially when they need an extension component rather than another lens. The title gives this part a clear role, but not a specific application or a stated extension amount, so I’d treat it as a purpose-specific part, not a general-purpose accessory. Its best use is in a setup that explicitly calls for an M42 extension barrel. If that’s what your build needs, the BORG name and 4531 designation make this a clearly identified part to consider.\u003c\/p\u003e\n\u003cdiv class=\"specialist-note\"\u003e\n\u003ch3\u003eSpecialist Note\u003c\/h3\u003e\n\u003cp\u003e42, in the M42 designation, is the practical clue here: this is an extension barrel for a setup that calls for M42, not a lens in its own right. The other useful detail is 4531, the part’s model designation; keep that number with your parts notes so you can identify this specific BORG component when planning or maintaining a build. I’d consider it for a system where an extension barrel is already part of the intended arrangement. The honest limit is that the title doesn’t tell us how much extension it provides, so I wouldn’t choose it based on a particular focus or magnification result alone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProduct name: BORG 4531 M42EXTENSION Barrel SBK\u003c\/li\u003e\n\u003cli\u003eProduct type: M42 extension barrel\u003c\/li\u003e\n\u003cli\u003eModel designation: 4531\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BORG","offers":[{"title":"Default Title","offer_id":57563628372308,"sku":"BG-4531","price":38.03,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0780\/2493\/3716\/files\/BG-4531_01.jpg?v=1791804878","url":"https:\/\/www.htf-store.com\/it\/products\/borg-4531-m42extension-barrel-sbk","provider":"Hard to Find Camera Store","version":"1.0","type":"link"}