Solar ND100000 Eclipse Filter K&F Concept for 49 mm lenses — ND100000 solar filter, 49mm thread

The K&F Concept Solar ND100000 Eclipse Filter for 49 mm lenses is a dedicated neutral density solar filter engineered for direct imaging and observation of the Sun during eclipses, sunspots, and other solar events. Designed to screw onto lenses with a 49 mm front thread, the filter provides extremely high attenuation (ND100000) to reduce sunlight to safe levels for camera sensors and for composing photographic frames. The optical material and mounting ring aim to maintain image quality while delivering the light reduction required for safely photographing the solar disk.

Advantages

This solar filter offers very high attenuation appropriate for direct-sun photography, enabling accurate exposure control when capturing eclipses and sunspots. Its screw-in 49 mm mounting makes it compatible with lenses that accept standard 49 mm filter threads, providing a secure, low-profile fit without adapters. The design focuses on protecting camera sensors from excessive light and heat while preserving contrast and detail across the solar disk when used with suitable camera and lens settings.

Suitable for

• Photographing solar eclipses and partial eclipses with compatible DSLR or mirrorless cameras
• Imaging sunspots and the solar disk at safe exposure levels
• Visual solar observation using camera viewfinder or live view with proper camera shielding
• Attaching to lenses and small refractors that accept a 49 mm filter thread

Key specifications

• Optical density: ND100000 (extreme attenuation for direct-sun imaging)
• Mount type: screw-in circular filter for 49 mm front thread
• Primary use: direct solar photography and observation
• Compatible with: lenses and accessories with 49 mm filter threads
• Construction: thin-profile mount designed to minimize vignetting on small- to medium-format setups

How to use

Ensure the lens or adapter has a 49 mm front thread before installation. Firmly screw the solar filter onto the lens thread until it is seated, taking care not to cross-thread. Compose and focus using live view or a dedicated solar-viewing mode; do not look directly through an optical viewfinder at the Sun without additional eye protection. Start with conservative camera settings (low ISO, fast shutter speed) and review histogram and preview images to refine exposure. Remove the filter only when the camera is pointed away from the Sun and stored safely.

Usage recommendations

Use the filter only for direct solar imaging and observation; it is not suitable for general photography. Always verify secure attachment and inspect the filter surface for scratches or defects before use. For eye safety, rely on the camera's live view or a suitable solar projection method rather than direct optical viewfinding. When using longer focal lengths or larger sensors, check for vignetting and adjust framing or use extension as needed. Follow manufacturer guidance for safe solar observation and do not use the filter with optical devices for which it is not specified.