{"product_id":"adjustable-iris-aperture-diaphragm-m30-to-m37-adapter-smooth-control","title":"Adjustable Iris Aperture Diaphragm M30 to M37 Adapter - Smooth Control","description":"\u003cp\u003eIn this review of the Adjustable Iris Aperture Diaphragm M30 to M37 Adapter, the bottom line is straightforward: it is for photographers and optics technicians who need a compact, mechanically reliable way to control aperture on small objective lenses such as the PVS-14. The single biggest reason to buy is its precise, smooth aperture control in a lightweight, aviation metal housing that adapts a 30 mm front to a 37 mm mount while offering a usable range from 1.5 mm to 26 mm.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM30 to M37 mount:\u003c\/strong\u003e Lets users adapt lenses with a 30 mm front to a 37 mm thread, expanding compatibility with accessory threads and housings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable aperture 1.5-26 mm:\u003c\/strong\u003e Provides a wide, usable iris range so photographers can fine tune light and depth of field for low-light or specialty optics work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible with PVS-14 \/ PVS-31 optics:\u003c\/strong\u003e Designed to pair directly with PVS-14 objective lenses, offering a practical upgrade path for night-vision objective control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAviation metal construction:\u003c\/strong\u003e Durable, lightweight material gives a solid feel and should hold up to repeated mounting and adjustment in field use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmooth motion control:\u003c\/strong\u003e The iris mechanism moves cleanly for precise, repeatable aperture changes without excess play.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis adapter suits technicians, night-vision enthusiasts, and photographers who work with small objective lenses and need mechanical iris control without altering optical elements. It is particularly useful for those who already own PVS-14 or PVS-31 optics and want a compact way to manage exposure and depth of field.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users needing electronic aperture control, integrated autofocus, or adapters for larger professional cine lenses; this is a mechanical, manual iris intended for small-diameter optics and mounting compatibility, not a full lens replacement.\u003c\/p\u003e\n\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSolid construction from aviation metal gives confidence in durability and everyday handling.\u003c\/li\u003e\n\u003cli\u003eWide aperture range (1.5 mm to 26 mm) covers most low-light and precision uses for small objectives.\u003c\/li\u003e\n\u003cli\u003eReported smooth motion control makes fine adjustments easy and repeatable in the field.\u003c\/li\u003e\n\u003cli\u003eDirect compatibility with PVS-14 optics offers a cost-effective upgrade path for night-vision setups.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eManual mechanical control means no electronic integration or remote adjustment options.\u003c\/li\u003e\n\u003cli\u003eDesigned for specific small-diameter fronts and PVS optics, so it is not a universal solution for larger lens systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount\u003c\/td\u003e\n\u003ctd\u003eM30 to M37\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTo Fit Lens Front\u003c\/td\u003e\n\u003ctd\u003e30 mm, 36 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003eAdjustable 1.5-26 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Diameter\u003c\/td\u003e\n\u003ctd\u003e1.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Diameter\u003c\/td\u003e\n\u003ctd\u003e26 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eAviation metal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003ePVS-14 \/ PVS-31 optics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Adjustable Iris Aperture Diaphragm M30 to M37 Adapter is a pragmatic, value-minded choice for users who need manual aperture control on small objective lenses, especially PVS-14 owners. Its durable aviation metal build, broad 1.5-26 mm range, and smooth motion deliver reliable, repeatable performance at a fraction of the cost of more elaborate optics modules.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit my PVS-14 objective lens?\u003c\/strong\u003e\u003cbr\u003eYes, it is specifically compatible with PVS-14 optics and several customers report it fits the PVS-14 objective lens directly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat aperture range does it provide?\u003c\/strong\u003e\u003cbr\u003eThe iris adjusts from a minimum diameter of 1.5 mm up to a maximum of 26 mm for flexible light control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the housing made from?\u003c\/strong\u003e\u003cbr\u003eThe adapter uses aviation metal for a lightweight but durable construction suitable for repeated field use.\u003c\/p\u003e","brand":"VONOV","offers":[{"title":"Default Title","offer_id":48653889667291,"sku":"B0BZTW2HF6","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/619HciZQU3L._AC_SL1500.jpg?v=1778544323","url":"https:\/\/gearmusthave.com\/products\/adjustable-iris-aperture-diaphragm-m30-to-m37-adapter-smooth-control","provider":"GearMustHave","version":"1.0","type":"link"}