KANI R640 67mm

KANI R640 67mm

SKU Number : K14019

The KANI R640 is a sharp-cut filter that transmits wavelengths above 640nm, allowing you to clearly photograph emission nebulae that radiate the Hα line (656.3nm), often visible as a red glow to the naked eye.

This filter is ideal for astrophotographers seeking enhanced contrast and reduced light pollution, even without using modified cameras. It also effectively suppresses unwanted wavelengths from artificial light sources (e.g., sodium and mercury lamps), functioning as a light pollution reduction filter.

Originally offered by various brands, this filter type has become rare in the market—KANI now brings it back in response to dedicated astro enthusiasts.

✅ Key Features

• Wavelength Cut: Passes wavelengths above 640nm, including Hα line (656.3nm)

• Application: Perfect for deep-sky imaging of emission nebulae

• Light Pollution Control: Reduces interference from common city light sources

• Premium Coatings: Water-repellent, oil-repellent, anti-smudge, low-reflection

• Material: High-quality optical glass

• Standard Thread: Compatible with most 67mm lenses

 Specifications

• Product Name: MC R640 67mm

• Filter Thread Size: 67mm

• Outer Dimensions: φ70mm × Thickness 3.5mm

• Glass Thickness: 1.1mm

• Weight: Approx. 15g

• Included Accessories: Protective storage case

• Compatibility: Accepts standard lens caps & additional filters

💡 Note: For best results in astrophotography, use with a sturdy tripod and long-exposure settings under dark skies.