The PRO ND 500 Neutral Density 9 Stop Filter is a dark neutral density filter that contains a Wide-Angle Lens Compatible Ultra Thin Frame with Glass Mounted with High-Pressure Press Technology. It has a factor 500 filter and converts to 9 stop light loss available in sizes 49mm, 52mm, 55mm, 58mm, 62mm, 67mm, 72mm, 77mm, and 82mm. It is a built-in 8-layer Anti-Reflective Multi-Coating made to be robust on any occasion. This lens is water & Oil Repellent, scratch and stain resistant with a Chemically Enhanced Optical Glass making it 4x Stronger. The filter motion of this lens gives moving objects and even running water blur effects and more alive and realistic. The shutter speed can be as slow as 8 full seconds.

Features:

Hardened Glass (UV/Protector)

The hardened optical glass has 4 times the breaking strength in ANSI standardised testing (ANSI Z80.3: 2001) where steel balls of varying size and weight were dropped from a height of 50 inches onto the glass.

High Transparency Polarising Film

The polarising film is the same as that used in the latest high definition LCD TV screens. It has a 25% higher light transmission than the standard polarising film used in current photographic filters.

Hardened 8 Layer Waterproof Multi-Coating that Is Scratch & Stain Resistant

Newly developed industry leading 8-layer multi-coating yields an average light transmission rate of 99.35% between 400 and 700nm (visible spectrum). These coatings greatly reduce reflections off the surface of the glass allowing you to capture more light in your photos.

Hard Coating

As with all HOYA multi-coatings, HD HMC is applied in a furnace at high heat, bonding the coating to the surface of the glass. This process is called "hard coating" and it is far more durable than other coating techniques. The chemistry of the top layer is formulated not just to be more durable but to be resistant to oil stains. This means that fingerprints and other oils are much easier to remove.

A multi-purpose fine-weather filter

Absorbs the ultraviolet rays which often make outdoor photographs hazy and indistinct. A multi-purpose, fine-weather filter for colour as well as black and white films. Also serves as a permanent lens protector.

Protect your valued lenses

This is the ultimate in clear filters. It will not affect the colour balance or performance of your lenses in the slightest. However, constant use will protect your valued lenses from expensive front element damage which could be caused by dirt, knocks or scratches. A cracked filter costs nothing in comparison to a cracked lens.

Digital Multi-Coated

Digital multi-coated filters greatly reduce the appearance of lens flare and ghosting caused by reflections.

UV Protected Case

Filter cases are UV protected to further lengthen the life of filters.