Solar ND100000 Eclipse Filter K&F Concept for Photography — 77 mm screw-in

The K&F Concept Solar ND100000 Eclipse Filter is a screw-in neutral density filter designed to enable safe solar photography and visual observation when attached to lenses with a 77 mm filter thread. Engineered to provide extreme light attenuation (ND100000), the filter reduces the Sun's intensity to a level suitable for imaging solar eclipses, capturing sunspots and other high-contrast solar details with compatible camera systems and stable support such as a tripod. The filter mounts directly onto the lens front element and is intended for use with cameras, telescopes or binoculars that accept 77 mm screw-in filters.

Advantages

This solar filter offers a very high optical density for maximum light reduction while maintaining a uniform neutral color balance across the image. Its screw-in 77 mm mount provides a secure, repeatable attachment to compatible lenses, helping to eliminate vignetting and light leaks at the interface. The filter is produced to meet the practical needs of solar imaging: simplified attachment, consistent attenuation for exposure control, and compatibility with a wide range of photographic optics that use the common 77 mm thread size.

Suitable for

• Photographing solar eclipses with DSLR or mirrorless cameras
• Imaging sunspots and solar disk details
• Visual solar observation through photographic optics that accept 77 mm filters
• Time-lapse or sequence exposure projects of solar events with tripod-mounted setups

Key specifications

• Filter type: Neutral density (solar) optical filter
• Light reduction: ND100000 (extreme attenuation for direct-sun use)
• Mount: 77 mm screw-in filter thread
• Compatibility: Lenses and optical devices with 77 mm front threads
• Primary use: Solar photography and safe direct-sun viewing through compatible optics

How to use

Before attaching the filter, ensure your lens or optical device has a 77 mm front thread and that the front element is clean and undamaged. Power off any active viewfinder or electronic eyepiece when initially pointing toward the Sun. Carefully screw the filter onto the lens until it seats firmly without cross-threading. Mount the camera on a tripod for stable framing and use a remote shutter release or timer to avoid camera shake. Set exposure according to solar photography guidelines—start with conservative shutter speed and aperture settings and adjust based on live view or test frames while observing safe viewing protocols. Never look through an optical viewfinder at the Sun without the filter securely in place.

Usage recommendations

Use the K&F Concept Solar ND100000 Eclipse Filter only on optical devices with a matching 77 mm thread and inspect the filter for damage before each use. Combine the filter with a sturdy tripod and appropriate camera settings, and follow established solar photography exposure practices and eye-safety precautions. Do not use the filter with optical viewfinders or eyepieces that allow direct unaided eye observation unless a proper solar-safe method is in place.