{"product_id":"black-wide-band-telescopic-adjustable-focus-beam-expander-laser-focusing-lens-m22-laser-pump-source-lens","title":"Black Wide Band Telescopic Adjustable Focus Beam Expander Laser Focusing Lens M22 Laser Pump Source Lens","description":"\u003cp\u003e\u003cb\u003eSpecification:\u003c\/b\u003e\u003cbr\u003e- Adjustable range: 0.5-18 meters\u003cbr\u003e- Maximum length of the barrel: 130mm+0.1mm\u003cbr\u003e- Minimum length: 77mm\u003cbr\u003e- Maximum outer diameter: 33.5mm\u003cbr\u003e- Thread size: M22x0.75\u003cbr\u003e\u003cbr\u003e\u003cb\u003eIntroduction:\u003c\/b\u003e\u003cbr\u003e- The laser comprehensive transmittance of the double-lens with k9 material and double-sided professional coating is as high as over 99%.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eQ \u0026amp; A:\u003c\/b\u003e\u003cbr\u003eQ: Why is coating necessary?\u003cbr\u003eA: It is known that the transmittance of a single uncoated k9 lens is 94%.Then, for two lenses, it would be 94x94% = 88.36%,with a significant loss. Using coated lenses can reduce the loss.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eNote:\u003c\/b\u003e\u003cbr\u003e- When using the lens, ensure that there are no gray spots, lint, fingerprints or other substances that may affect the laser transmittance. Otherwise, the lens will be burned out. Please remember that the lens is a vulnerable part. when using it, you must pay attention to the storage issue. Avoid excessive humidity, otherwise it will cause the lens to mold and develop marks.\u003cbr\u003e- It is recommended for use above 1 meter.\u003cbr\u003e- No scale.\u003cbr\u003e\u003cbr\u003e\u003cb\u003ePackage Included:\u003c\/b\u003e\u003cbr\u003e- 1 x Focusing Lens\u003c\/p\u003e","brand":"TeSeek Official","offers":[{"title":"Default Title","offer_id":47720329511148,"sku":"102674","price":40.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0755\/9669\/3740\/files\/1780709820-1.jpg?v=1780991405","url":"https:\/\/teseek.com\/de\/products\/black-wide-band-telescopic-adjustable-focus-beam-expander-laser-focusing-lens-m22-laser-pump-source-lens","provider":"TeSeek Official","version":"1.0","type":"link"}