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Clear circular 77mm camera filter with ultra-slim black frame and multi-coated optical glass

K&F CONCEPT 77mm MCUV Ultra Slim 18 Multi-Coating camera filter

SKU CH-9BF0-ETWMN

A 77 mm UV filter with 18 multi-layer coatings, 3.3 mm ultra-slim frame, 94 % light transmittance and AGC optical glass for lens protection and reduced reflection

  • Size77mm
  • Blocks UV and reduces blue cast for clearer colour
  • 18-layer nano coating cuts reflection on both sides
  • 3 mm ultra-slim frame prevents vignetting on wide angles
  • Imported AGC optical glass delivers 94% transmittance
  • CNC non-slip frame allows quick install and removal

77mm UV Protection Filter

The K&F CONCEPT 77mm MCUV Ultra Slim filter fits camera lenses with a 77mm thread diameter. It serves two purposes: blocking ultraviolet light that can add a blue cast to images and shielding the front element from dust and scratches. The filter is designed for photographers who want a protective layer without altering exposure or colour balance. It suits both wide-angle and telephoto lenses thanks to its slim profile.

18-Layer Coating & Included Cloth

The filter uses imported AGC optical glass with 18 multi-layer nanometer coatings on both sides. These coatings raise light transmittance to 94%, reduce reflections from the filter itself and help repel water and oil. A cleaning cloth is supplied in the pack so the glass can be wiped clean before shooting. The CNC-machined non-slip frame makes attachment and removal straightforward.

3.3mm Thickness Prevents Vignetting

At just 3.3mm thick, the ultra-slim frame avoids vignetting even when stacked on wide-angle lenses. The double-sided polishing maintains clarity across the frame, including at telephoto focal lengths. The filter only fits lenses marked Ø77mm; it will not mount on other thread sizes. It is not water-resistant, so care is needed in wet conditions.

Highlights

  • Blocks UV and reduces blue cast for clearer colour
  • 18-layer nano coating cuts reflection on both sides
  • 3 mm ultra-slim frame prevents vignetting on wide angles
  • Imported AGC optical glass delivers 94% transmittance
  • CNC non-slip frame allows quick install and removal

Specifications

Size77mm

Questions about this item

How often will the 18 multi-layer nanometer coatings need reapplication or replacement?

The 18 multi-layer nanometer coatings are permanent and do not require reapplication; only the filter glass itself would need replacement if scratched or damaged.

What is the first optical limit reached when stacking this 3.3 mm ultra-slim filter with other filters on a wide-angle lens?

At 3.3 mm thickness with double-side polishing, vignetting is eliminated on wide-angle lenses, so the first limit would be total stack height rather than this filter alone.

How much heat does the filter absorb during all-day shooting and does it affect the 94% light transmittance?

The optical glass filter absorbs negligible heat and maintains 94% transmittance continuously; it has no electronics or coatings that degrade with temperature.

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