{"product_id":"4-in-x-5-65-in-square-nd1-5-5-stops-filter-ultra-slim-matte-box","title":"4 in x 5.65 in Square ND1.5 (5 Stops) Filter - Ultra Slim Matte Box","description":"\u003cp\u003eIn this review the K\u0026amp;F CONCEPT 4 in x 5.65 in Square ND1.5 (5 Stops) Filter is evaluated as a practical matte box accessory for videographers who need reliable exposure control. The bottom line: it is a simple, high-clarity ND32 that gives filmmakers more control over shutter speed and aperture without introducing color cast, and it is best suited to shoots that use a matte box system such as Tilta or SmallRig. The review highlights real-world handling, optical performance, and packing quality to help decide if this square ND filter belongs in your kit.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatte box compatibility:\u003c\/strong\u003e Designed to mount on matte boxes and filter frames so it fits Tilta, SmallRig and mini matte box systems for flexible lens use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5 stops light reduction:\u003c\/strong\u003e The ND32 density provides five stops of attenuation, allowing slower shutter speeds or wider apertures in bright conditions without overexposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImported HD optical glass:\u003c\/strong\u003e Double-sided polished glass produces clear images suitable for 4K and 8K video without noticeable softness or color shift.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.2% ultra-low reflectivity:\u003c\/strong\u003e Very low reflectivity reduces unwanted lens reflections and helps prevent vignetting for higher contrast and richer detail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e28 multi-layer coatings:\u003c\/strong\u003e Nano coatings on both faces make the surface scratch resistant, waterproof, oil resistant and easier to keep clean during location work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtective storage:\u003c\/strong\u003e The included leather filter bag provides simple protection for transport and keeps the filter safe in the bag or case.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe filter is aimed at cinematographers and serious hybrid shooters who already use or plan to use a matte box system and need a robust square ND to control exposure without sacrificing image clarity. It is especially useful for outdoor interviews, narrative shooting and controlled daylight scenes where five stops of reduction is the right tool for motion blur and depth of field control.\u003c\/p\u003e\n\u003cp\u003eIt is less appropriate for still photographers who prefer screw-in circular ND filters or for users who need variable ND functionality. Also, because it is a square filter meant for matte boxes, buyers should have or plan to buy a compatible matte box and frames rather than expecting to screw it directly onto a lens.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh clarity HD optical glass preserves detail and is suitable for 4K and 8K video workflows.\u003c\/li\u003e\n\u003cli\u003eLow reflectivity and multi-layer coatings reduce flare, fingerprints and make cleaning easier on set.\u003c\/li\u003e\n\u003cli\u003eMatte box form factor makes the filter adaptable to many focal lengths when used in a professional filter holder.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSquare filters require a matte box or filter frame so they are not a screw-on, lens-specific solution.\u003c\/li\u003e\n\u003cli\u003eFixed ND density limits flexibility compared with a variable ND when you need continuously adjustable stops.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter type\u003c\/td\u003e\n\u003ctd\u003eSquare ND (ND32)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDensity\u003c\/td\u003e\n\u003ctd\u003eND1.5 (5 stops)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e4 in x 5.65 in (10.16 x 14.35 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass\u003c\/td\u003e\n\u003ctd\u003eImported HD optical glass, double-sided polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003e28 multi-layer nanometer coatings, waterproof and oil resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReflectivity\u003c\/td\u003e\n\u003ctd\u003eApproximately 0.2% ultra-low reflectivity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eDesigned for matte box systems (Tilta, SmallRig, mini matte box, filter frames)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe K\u0026amp;F CONCEPT square ND1.5 (ND32) is a straightforward, well-made matte box filter that delivers neutral, low-reflection light reduction for 4K\/8K video shooters who use filter holders. It represents good value for camera operators who need a fixed five-stop ND with durable coatings and clear optics, provided they accept the matte box workflow rather than screw-on convenience.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this filter be screwed onto a lens?\u003c\/strong\u003e\u003cbr\u003eNo. This is a square matte box filter intended to be mounted in a filter frame or matte box rather than screwed onto a lens.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it change color balance?\u003c\/strong\u003e\u003cbr\u003eThe filter uses imported HD optical glass and double-sided polishing designed to avoid color cast, so it should not noticeably alter color balance for 4K or 8K capture.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the surface easy to clean on set?\u003c\/strong\u003e\u003cbr\u003eYes. The 28 multi-layer nano coatings make the surface more resistant to scratches, oil and fingerprints and simplify cleaning in the field.\u003c\/p\u003e","brand":"K\u0026F CONCEPT","offers":[{"title":"Default Title","offer_id":48614172164315,"sku":"B0CQJY7XR2","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/7116qnQJQWL._AC_SL1500.jpg?v=1778504530","url":"https:\/\/gearmusthave.com\/products\/4-in-x-5-65-in-square-nd1-5-5-stops-filter-ultra-slim-matte-box","provider":"GearMustHave","version":"1.0","type":"link"}