Filter B+W 090 Red Light 590 MRC, screw-in lens filter, 49 mm

Filter B+W 090 Red Light 590 MRC is a screw-in photographic filter with a 49 mm thread designed to transmit red light centered near 590 nm. The filter alters color balance by selectively passing red wavelengths, enabling controlled color shifts for creative effects or specific technical uses. The MRC (Multi-Resistant Coating) on optical glass reduces surface reflections and flare while helping to maintain image contrast and color fidelity when used on compatible lenses with a 49 mm diameter.

Advantages

The filter provides precise color filtration for images that require increased red content or color separation around the 590 nm band. Multicoated surfaces minimize ghosting and flare, improving contrast and clarity in both studio and outdoor conditions. The screw-in 49 mm mount ensures secure attachment to matching lens threads and a slim profile helps prevent vignetting on wide-angle lenses. Constructed for optical performance, the glass and coating combination offers consistent results across exposures.

Suitable for

• Creative color photography and artistic color effects
• Black-and-white photography when used to alter tonal separation
• Technical and scientific photography requiring a defined red-band transmission
• Studio work and controlled lighting setups
• Outdoor scenes where selective color emphasis is desired

Key specifications

• Filter type: red light transmission filter (around 590 nm)
• Mount: screw-in circular filter
• Thread size: 49 mm
• Coating: Multi-Resistant Coating (MRC) to reduce reflections and improve contrast
• Optical material: coated optical glass
• Profile: slim design to reduce vignetting on wide-angle lenses

How to use

Attach the filter by gently screwing it into the front thread of a lens with a 49 mm diameter until it is hand-tight; avoid overtightening. Compose and meter the scene as usual, bearing in mind that the filter shifts color balance toward red wavelengths—this may require white balance adjustment or exposure compensation depending on the camera and lighting. For consistent color results in digital workflows, consider setting a custom white balance or applying color corrections in post-processing. Remove the filter when normal color rendering is required.

Usage recommendations

Handle the filter by its edges to avoid fingerprints on the coated surface. Clean with a blower, soft brush, or microfiber cloth and a manufacturer-recommended cleaning solution. Use in combination with neutral density or polarizing filters only if thread stacking does not introduce vignetting; when stacking, verify image corners at the widest aperture. Store in a protective case when not in use to preserve the coating and optical surfaces.