Calumet Neutral Density Filter ND16x SMC 72 mm Ultra Slim 28-Layer

The Calumet Neutral Density Filter ND16x SMC 72 mm Ultra Slim 28-Layer reduces light transmission by 16× (4 stops), enabling longer exposures or wider apertures in bright conditions while preserving image color and contrast. Its ultra-slim 72 mm mounting minimizes vignetting on wide-angle lenses, and the 28-layer multi-coating reduces surface reflections and ghosting for reliable optical performance. This neutral density filter is designed for use with still photography and creative motion effects where controlled light reduction is required.

Advantages

The ultra-slim 72 mm design reduces the risk of vignetting when used on wide-angle lenses and stacked setups. Multi-coated glass with 28 layers lowers reflections and flare, maintaining color fidelity and contrast across the frame. The ND16x density provides a consistent 4-stop light reduction useful for extending exposure times or opening aperture in bright light without changing ISO. The filter mounts securely to standard 72 mm filter threads and offers a neutral color balance suited to landscape, architectural, and motion photography.

Suitable for

• Long-exposure landscape photography (waterfalls, seascapes)
• Motion blur effects in urban and nature scenes
• Using wider apertures in bright light for shallow depth of field
• Time-lapse sequences requiring longer frame exposures

Key specifications

• Filter type: Neutral density (ND) with 16× light reduction (4 stops)
• Mount diameter: 72 mm, ultra-slim frame to minimize vignetting
• Optical construction: Multi-coated glass with 28 coating layers
• Color characteristic: Neutral transmission to preserve color balance
• Intended use: Still photography, long exposures, and motion-blur effects

How to use

Screw the filter onto the front of a lens with a 72 mm thread until it seats securely; avoid overtightening. Compose and focus with the filter attached, then switch to manual focus if required for long exposures. Use a tripod for multi-second exposures to prevent camera movement artifacts. Meter exposure with the filter in place or apply the 4-stop adjustment to your metered value to calculate the correct shutter speed. When stacking filters, the ultra-slim frame helps reduce vignetting, but check corners at wide focal lengths.

Usage recommendations

Clean the filter surfaces with a microfiber cloth before use and store it in a protective case when not in use. For best results in long-exposure landscape photography, combine the ND16x with a sturdy tripod, remote release or camera timer, and mirror lock-up or electronic shutter where available. Avoid direct sun pointing for extended periods to limit heating and potential internal reflections.