Calumet 62mm ND4x SMC Ultra Slim Filter

The Calumet ND4x SMC Ultra Slim Filter reduces incoming light by 2 stops, extending exposure time and allowing wider apertures in bright conditions. Built with Japanese AGC glass and 28 multilayer coatings, it maintains neutral colour reproduction while resisting flare, water, grease and scratches. A slim 3.3mm aluminium frame with front threading supports filter stacking with minimal risk of vignetting.

Calumet ND4x SMC Ultra Slim Filter Key Features:

• Neutral density filter with ND4x light reduction
• 62mm filter thread for compatible lenses
• 2EV light reduction with exposure times up to 4x longer
• 28 multilayer coatings for optical clarity and durability
• Japanese AGC glass with neutral colour transmission
• Hydrophobic and oleophobic coatings for easier cleaning
• Scratch-resistant and anti-reflective surface treatments
• Ultra slim 3.3mm aerospace aluminium frame
• Front threading for stacking filters or accessories
• Protective filter case included

What’s in the box?

• 1 x Calumet ND4x SMC Ultra Slim Filter - 62mm
• 1 x Protective Case

FAQs

What effect does the Calumet ND4x SMC Ultra Slim Filter have on exposure?

The ND4x rating reduces light by 2 EV, allowing shutter speeds up to 4 times longer than without a filter. This feature supports motion-blur effects, such as flowing water or moving clouds. It also helps manage exposure when using wider apertures in strong daylight. Colour balance remains neutral.

Does the filter affect image quality or colour accuracy?

Japanese AGC glass maintains neutral colour transmission and consistent contrast. The 28 multilayer coatings reduce reflections and glare. This helps preserve sharpness across the frame. Image quality remains stable even in high-contrast scenes.

Is the slim frame suitable for stacking filters?

The 3.3mm aluminium frame is designed to minimise vignetting, including on wider lenses. Front threading allows additional filters or accessories to be attached. Tabs on the frame make installation and removal easier and support flexible shooting setups.