{"product_id":"sotac-adjustable-aperture-lens-cover-for-pvs-14-18-31","title":"SOTAC Adjustable Aperture Lens Cover for PVS-14\/18\/31","description":"\u003cp\u003eThe \u003cb\u003eSOTAC-GEAR Adjustable Aperture \u0026amp; Daylight Filter (Light Limiter)\u003c\/b\u003e is a critical, multi-purpose upgrade for anyone running PVS-14, PVS-18, or PVS-31 night vision devices.\u003c\/p\u003e\n\u003cp\u003eOften referred to as a \"refocus ring\" or \"adjustable iris,\" this device snaps securely over your objective lens. It solves one of the biggest physical limitations of traditional night vision: the inability to focus on near and far objects simultaneously. By restricting the amount of light entering the tube, it forces a \"pinhole effect\" that drastically increases your depth of field.\u003c\/p\u003e\n\u003ch3\u003eKey Specifications \u0026amp; Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eAdjustable Aperture (Pinhole Effect):\u003c\/b\u003e By twisting the outer ring, you can smoothly open or close the internal aperture (like a camera lens). Closing the aperture down reduces incoming light and drastically increases your focal depth, allowing near and far objects to be in focus at the same time.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eDaylight Protection:\u003c\/b\u003e Acts as a daylight training filter. If you need to turn your NVGs on in a brightly lit area to test them, closing the aperture protects the sensitive image intensifier tube from light damage and \"bleaching.\"\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eSacrificial Lens Protection:\u003c\/b\u003e Features a durable front glass\/polycarbonate barrier that acts as a shield. It takes the impact of dirt, debris, branches, and airsoft BBs, sacrificing itself to protect your immensely expensive objective lens from cracking or scratching.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eUniversal Fit:\u003c\/b\u003e Designed with a friction-fit or screw-on interface that perfectly mates with standard mil-spec objective lenses found on the PVS-14, PVS-18, PVS-31, and equivalent analog or dummy systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cb\u003eRugged Construction:\u003c\/b\u003e Built from lightweight, impact-resistant polymer and metal components to ensure it survives harsh field conditions without adding unnecessary weight to the front of your helmet.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SOTAC","offers":[{"title":"PVS14","offer_id":43698212831291,"sku":null,"price":36.0,"currency_code":"USD","in_stock":true},{"title":"PVS31\/18","offer_id":43698212864059,"sku":null,"price":36.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0020\/3250\/0781\/files\/5_SOTAC_Adjustable_Aperture_Lens_Cover_for_PVS-14_18_31.webp?v=1782193324","url":"https:\/\/www.apextacgear.com\/products\/sotac-adjustable-aperture-lens-cover-for-pvs-14-18-31","provider":"APEXTAC GEAR","version":"1.0","type":"link"}