The viewing filter works just like an ND filter to protect your eyes by reducing the amount of light to help you determine the position of the lights or sun. Nisi Viewing filters are made of aviation grade alumimum with optical glass. Silicone eye cup is designed to prevent light leaks.

Highlights:

• Made of 2 to 6 stops Variable ND
  
• High Transmittance
  
• Observe general brightness of light and eliminate polarized light
• Help to determine the position of the lights or sun
• Made of aviation grade aluminum with optical glass

Item Included:

1x NISI V-ND eye piece Viewing Filter (Variable Neutral Density)