Dark-Sky 77 mm Slim filter from Explore Scientific is specially designed to enhance the photography of auroras and deep sky, even in environments polluted by light. Thanks to its unique technology, this filter effectively blocks yellow light at 590 nm from sodium vapor lamps while allowing key wavelengths to pass through to capture auroras (550 nm for green and 630 nm for red). With its ultra-thin design of only 4 mm, this filter fits perfectly on wide-angle lenses without the risk of vignetting.

Features:

• Filter thread: 77 mm
• Blocks yellow light from sodium vapor lamps at 590 nm
• Transmits over 90% of wavelengths 550 nm (green) and 630 nm (red)
• Designed for photographing auroras and deep sky
• Reduces light pollution, ideal for urban photography
• Special optical glass finish with neodymium oxide
• Black anodized aluminum housing
• Ultra-thin height of 4 mm (Slim)

Advantages:

• Increases contrast and detail in auroras and nebulae photographs
• Compatible with wide-angle lenses, without vignetting
• Enhances red and green tones, difficult to correct in post-processing
• Ideal for landscape photography, the Milky Way, and natural night scenes
• Effectively blocks sources of light pollution, such as streetlights and greenhouses

Compatibility:

• Compatible with all photo lenses equipped with a 77 mm filter thread

The Dark-Sky 77 mm Slim filter from Explore Scientific is the essential tool for astrophotographers and night landscape enthusiasts looking to capture sharp and natural images in a light-polluted sky.