SEAGULL half-frame filter kit for 72 mm lenses, model SB1079

SEAGULL half-frame filter kit for 72 mm lenses, model SB1079 contains graduated (half) filters designed to be mounted on lenses with a 72 mm filter thread. The kit is intended to darken the upper or lower portion of the image to balance contrast between bright skies and darker foregrounds, allowing for more even exposure in landscape and outdoor photography. The filters are compatible with standard 72 mm screw-in lenses and can be used to control highlights without altering the exposure of the entire frame.

Advantages

The half-frame filters provide a simple optical solution for reducing overexposed skies and preserving foreground detail while keeping color neutrality and edge sharpness. Light, compact and easy to screw on, the filters enable quick in-field adjustments and repeatable results. Their graduated design allows photographers to selectively darken part of the scene for improved dynamic range control and more balanced compositions.

Suitable for

• Landscape photography where sky and foreground have large exposure differences
• Seascapes and sunrise/sunset shoots requiring controlled highlights
• Outdoor scenes with bright backlighting or reflective surfaces
• Photographers using 72 mm threaded lenses seeking non-digital exposure control

Key specifications

• Thread diameter compatibility: 72 mm lens filter thread
• Filter type: graduated (half) neutral density-style effect for selective darkening
• Optical effect: reduces brightness in part of the frame to balance exposure
• Physical format: screw-in circular filters sized for direct attachment to lens
• Finish: designed to maintain image sharpness and color neutrality

How to use

Attach the appropriate filter from the kit to the lens by screwing it onto the 72 mm filter thread until secure. Position the graduated edge so that the darker portion covers the bright area of the scene—typically the sky—while keeping the clear portion over the foreground. Meter and compose the shot, then adjust exposure settings as needed; the filter reduces only part of the frame, so camera metering may require manual tuning or use of exposure compensation. Remove or swap filters when the lighting conditions change.

Usage recommendations

Use the half-frame filter kit when you need to reduce sky brightness without affecting foreground detail. For best results, pair the filter with a tripod and manual exposure control in scenes with pronounced dynamic range. Clean filter surfaces with a microfiber cloth and store in protective cases to avoid scratches.