SEAGULL Half-ND Camera Filter 46mm Blue (SB1161)

The SEAGULL Half-ND Camera Filter 46mm Blue (SB1161) is a screw-in optical filter with a half neutral-density gradation and a blue tint. It attaches to lenses with a 46mm filter thread and provides a gradual reduction of light across part of the frame while introducing a subtle blue color cast. This combination makes it suitable for balancing bright skies with darker foregrounds, controlling exposure during long exposures, and creating cool-toned creative effects in landscape and outdoor photography.

Advantages

The half-ND gradation reduces highlights in a defined portion of the image without affecting the entire frame, allowing more even exposure between sky and ground. The blue tint offers consistent color shift for creative grading in-camera, minimizing the need for heavy post-processing. The 46mm screw mount ensures a secure, light-tight attachment to compatible lenses and maintains optical alignment with minimal vignette on standard focal lengths.

Suitable for

• Landscape photography to balance bright skies and darker foregrounds
• Long-exposure shots where partial light reduction is required
• On-location color grading to introduce cool blue tones
• Outdoor and travel photography with lenses that accept 46mm filters

Key specifications

• Filter type: half neutral-density (graduated)
• Tint: blue (cool color cast)
• Mount: 46mm screw thread
• Intended use: selective exposure reduction and color correction/grading

How to use

Screw the filter onto the front of a lens with a 46mm filter thread until it is snug but not overtightened. Rotate the filter to position the transition line between the darkened and clear areas where it best balances the scene — typically aligning the gradation with the horizon or the edge between sky and foreground. For long exposures, combine the half-ND effect with appropriate shutter speed and aperture settings to achieve the desired motion blur and exposure, while monitoring white balance to accommodate the blue tint.

Usage recommendations

Use the filter on wide-angle to standard focal lengths for landscape scenes, and check live view or a test frame to confirm the gradation alignment and color effect. When precise color neutrality is required, bracket exposures or shoot in RAW to retain flexibility in post-processing.