SEAGULL half-frame camera filter 67mm - blue (model SB757)

The SEAGULL half-frame camera filter 67mm - blue (model SB757) is a screw-in optical filter designed for lenses with a 67 mm thread. The filter provides a blue tint to the image by affecting color balance and tone on one half of the frame, allowing photographers to create split-tone effects, reduce warm color casts, and emphasize cool hues. It installs directly onto compatible lenses and can be used on both prime and zoom objectives with a matching thread diameter.

Advantages

This half-frame blue filter offers a controlled and consistent color shift on one side of the frame, enabling quick creative effects without post-processing. The screw-in design ensures secure attachment and accurate alignment on any lens with a 67 mm thread. The optical glass delivers reliable color rendering while preserving sharpness and contrast across the unaffected portion of the image.

Suitable for

• Portrait photography where selective color toning is desired
• Landscape photography to add cooler tones to skies or water
• Creative and experimental photography to produce split-tone or graduated color effects
• On-location shoots where in-camera color effects reduce the need for extensive editing

Key specifications

• Filter type: half-frame (half) screw-in optical filter
• Thread diameter: 67 mm
• Color tint: blue on one half of the filter
• Mounting: 67 mm screw thread compatible with lenses of the same diameter
• Material: optical glass element in metal or plastic filter ring (manufacturer specification)

How to use

Screw the filter onto a lens with a 67 mm thread until it is firmly seated and aligned. Compose the image so that the transition between the tinted and clear halves falls on the desired part of the frame; adjust framing or tilt the camera to change the placement of the blue tint. For portrait work, position the tinted half to influence background tones; for landscapes, place the tint over sky or water as needed. Remove the filter when full-frame neutral color is required.

Usage recommendations

To achieve natural-looking results, meter and white-balance with the filter in place and take test exposures to verify the effect. Combine the half-frame blue filter with neutral density or polarizing filters only when compatible with stacking on a 67 mm thread and when optical alignment preserves the intended split-tone effect.