UV filter K&F Concept Nano-C HMC UV 49 mm - optical protective filter

K&F Concept Nano-C HMC UV 49 mm is an optical protective filter that reduces ultraviolet haze and provides front-element protection for lenses with a 49 mm filter thread. The filter uses multi-coated (HMC) glass combined with a Nano-C coating to limit light reflections and repel dust and moisture while maintaining image clarity and accurate color reproduction. It is intended as a low-impact optical accessory that stays on the lens to guard against scratches, fingerprints and incidental contact during landscape, travel and everyday photography.

Advantages

The multi-coated HMC glass reduces internal reflections and flare, while the Nano-C surface treatment improves water and oil repellency for easier cleaning. The slim filter ring design minimizes vignetting on wide-angle lenses and preserves lens performance by maintaining image sharpness and natural colors. The filter adds mechanical protection to the front element without altering exposure or autofocus behavior.

Suitable for

• Landscape and outdoor photography to reduce UV haze
• Travel and street photography for continuous front-element protection
• Everyday shooting where lens protection against dust and scratches is required

Key specifications

• Filter size: 49 mm thread
• Filter type: UV optical filter
• Glass: multi-coated (HMC) optical glass
• Coating: Nano-C hydrophobic and oleophobic surface treatment
• Frame: slim metal filter ring designed to reduce vignetting
• Function: reduces UV haze while providing mechanical front-element protection

How to use

Screw the filter gently onto the lens front until it is securely seated; avoid cross-threading. The filter can remain mounted during shooting and does not require exposure compensation. Clean the coated surface with a microfiber cloth and, when necessary, use lens-cleaning solution designed for coated optics. Store the filter in its protective case when not in use to prevent scratches.

Usage recommendations

Use the filter on lenses with a 49 mm thread and verify compatibility with lens hoods or stacked filters to avoid vignetting. For best results, keep the Nano-C coating clean and avoid abrasive materials when wiping the glass.