Calumet UV Filter SMC TG 77 mm Ultra Slim 28 Layers

The Calumet UV Filter SMC TG 77 mm Ultra Slim 28 Layers is a lens-mounted protective filter designed for cameras with a 77 mm thread. It reduces ultraviolet light transmission to help improve clarity and color rendition in outdoor photography while providing a physical barrier that protects the front element of the lens from dust, moisture and scratches. The ultra-slim frame is engineered to limit vignetting on wide-angle lenses, and the 28-layer multi-coating minimizes reflections to maintain contrast and reduce ghosting in strong light.

Advantages

This filter combines ultraviolet filtration with a durable protective layer in a low-profile, ultra-slim metal frame that reduces the risk of mechanical vignetting on wide-angle optics. The 28-layer multi-coating provides improved light transmission and reduces surface reflections, helping to preserve image contrast in backlit or high-reflection conditions. The slim construction also eases stacking with additional filters and reduces the chance of filter ring interference when using lens hoods designed for wide-angle lenses.

Suitable for

• Outdoor landscape and travel photography
• Portraits shot in bright daylight where UV reduction improves color fidelity
• Wide-angle lens use where minimal vignetting is required
• Everyday lens protection during transport and field use

Key specifications

• Filter type: Ultraviolet (UV) protective filter
• Filter thread diameter: 77 mm
• Frame profile: Ultra-slim metal ring to reduce vignetting
• Coating: Multi-coated with 28 layers to reduce reflections and improve contrast
• Primary functions: UV reduction and physical front-element protection

How to use

Screw the filter onto the lens’s 77 mm front thread until it is finger-tight and correctly seated; avoid over-tightening to prevent damage to the filter ring or lens threads. Use the filter on clear days to reduce ultraviolet haze and preserve color accuracy, or whenever you want to protect the front element from accidental contact and environmental elements. The ultra-slim profile is particularly useful on wide-angle lenses to maintain the intended field of view without introducing mechanical vignetting.

Usage recommendations

Clean the filter surfaces with a soft blower, microfibre cloth and appropriate lens cleaning solution when needed, and store the filter in a protective case when not in use. When stacking filters, check for vignette at the widest focal length and remove extra layers if corner shading appears.