{"product_id":"porthole-mark-ii-prime-interface","title":"Porthole Mark II Prime Interface","description":"\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eThe Light-Lock Professional Bridge. \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe Prime Interface is a high-performance Dry Side component designed specifically for photographers using dedicated macro lenses. Unlike universal mounts, the Prime Interface offers a direct mechanical connection through the lens's filter threads, turning the Porthole and your glass into a single, integrated optical tool. This interface is ideal for professionals who require the highest level of stability, complete glare elimination, and unobstructed tactile control over their equipment.\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\n\u003cspan\u003e\u003cstrong\u003ePerfect Focal Alignment\u003c\/strong\u003e:\u003c\/span\u003e\u003cspan\u003e Together with the Porthole Studio, it achieves an exact 12-inch distance between the sensor and the acrylic, matching the minimum focal distance of most 90-100mm Macro Lenses.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\n\u003cstrong\u003eDirect-Thread Stability\u003c\/strong\u003e: Features a bonded aluminum male thread (67mm\/62mm) for a rock-solid, vibration-free union.\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\n\u003cspan\u003e\u003cstrong\u003eRadial Cammed Connection\u003c\/strong\u003e:\u003c\/span\u003e\u003cspan\u003e Features a precisely engineered radial cammed cutout that aligns with the Studio Upper Assembly. This provides a fast, secure mechanical lock that remains perfectly centered at any shooting angle.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\n\u003cspan\u003e\u003cstrong\u003eTotal Light-Lock Seal\u003c\/strong\u003e:\u003c\/span\u003e\u003cspan\u003e Fully seals the 90mm opening at the top of the Porthole. This creates a completely enclosed \"dark chamber\" that eliminates top-down glare and light leaks, maximizing contrast.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\n\u003cspan\u003e\u003cstrong\u003eUnobstructed Manual Control\u003c\/strong\u003e:\u003c\/span\u003e\u003cspan\u003e Threads directly in front of your lens, keeping your manual focus and lens adjustments completely accessible. Professional shooters get tactile, high-precision control needed for critical macro work without interference from a universal mount.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePrime Interface comes in 62mm and 67mm and includes a universal dust cap, this covers most Macro Lens sizes, a step ring can be used to adapt to other lens rings if needed.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e \u003c\/p\u003e","brand":"Avast Marine Works","offers":[{"title":"67mm","offer_id":51266319155364,"sku":"Porthole Mark II 67mm Prime Interface","price":29.99,"currency_code":"USD","in_stock":true},{"title":"62mm","offer_id":51266319188132,"sku":"Porthole Mark II 62mm Prime Interface","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0872\/1966\/files\/pi1_2.png?v=1776098319","url":"https:\/\/www.avastmarine.com\/products\/porthole-mark-ii-prime-interface","provider":"Avast Marine Works","version":"1.0","type":"link"}