The Formatt Hitech 72mm -20 UVAR Filter for Photographyis an underwater filter that is designed to absorb ultraviolet light and improve color accuracy at depths of 59'.0 to 65.6'.

Due to its density, water naturally attenuates radiation, including visible light. Lower-energy wavelengths of visible light that are apparent as red, orange, and yellow colors are attenuated more than higher-energy wavelengths of visible light that are apparent as blue, indigo, and violet colors. This further obscures the ability to see red to yellow hues, and can otherwise limit underwater life or objects to appearing only in shades of blue to violet.

Additionally, particles suspended underwater can reflect and scatter ambient sunlight. When this occurs, higher-energy wavelengths within sunlight such as ultraviolet light and visible light that are apparent as violet and blue colors are more easily reflected than lower-energy wavelengths of visible light that are apparent as yellow, orange, and red colors. Together, these particles, along with the ultraviolet, violet, and blue light they are reflecting can obscure details within a scene while further imparting an unwanted bluish cast.

The Formatt Hitech 72mm -20 UVAR Filter can help improve the results of underwater images at depths of 59'.0 to 65.6' by effectively absorbing ultraviolet light and reducing visible light that appears as blue and violet. Available red, orange, and yellow light is allowed into an underwater housing and camera, helping to improve color balance throughout the frame.

This filter is constructed from Schott B270 glass for increased optical clarity as well as color fidelity and features an aluminum-alloy filter ring for durability while remaining lightweight. Anti-reflection coatings on the glass prevent internal ghosting and reflections while offering greater protection to the filter substrate, helping it to stay clean for longer than with uncoated filters. When used, the Formatt Hitech 72mm -20 UVAR Filter's 0.1 density darkens the entire image by 0.3 stops. This reduction in exposure can be compensated for by adjusting the aperture setting of the lens it is placed on, or the shutter speed of the camera being used.

Underwater UV Filter    Helps Balance Underwater Ambient Light    For Depths of 59'.0 to 65.6'    1.25x Filter Factor, +0.3 Stop    Schott B270 Glass Construction    Multi-Coated    Aluminum-Alloy Filter Ring    Plastic Case

• Designed to absorb ultraviolet light and improve the color accuracy of underwater images at depths of 59'.0 to 65.6'
• Helps balance levels of visible light while photographing in green or blue-colored, fresh water or salt water
• Reduces the appearance of visible violet and blue light while allowing available red, orange, and yellow colors into an underwater housing and camera
• 1.25x filter factor reduces exposure by 0.3 stop
• Filter density can be compensated for by adjusting lens aperture or camera shutter speed
• Constructed from Schott B270 Glass for optical clarity
• Multi-coated to prevent internal ghosting and reflections
• Aluminum-alloy filter ring for durability while remaining lightweight
• Knurled front edges provide a more textured grip when mounting or removing it from a lens
• Plastic case included for storage and transport

Related Questions and Answers

Q: 1. Can this fit on the Hasselblad XCD 45/P lens?

A: Yes, the FUJIFILM 62mm Protector Filter is compatible with the Hasselblad XCD 45mm f/4 P Lens.

Q: 2. Is this filter compatible with the fixed lens on the Leica Q?

A: Yes, the Fujifilm 49mm slim protector will work with the Leica Q.

Q: 3. Is this filter safe for solar eclipse photography?

A: Haida 95mm NanoPro One Million X Edition ND Filter (20 Stop) BH #HAHD460795 is not rated for solar photography no.

Q: 4. will this filter cause vignetting on the new XF 16-50 kit lens at 16mm?

A: At 16mm on the XF 16-50mm kit lens, the FUJIFILM 58mm Protector Filter won't cause vignetting.

Q: 5. Does this fit the Fuji X20 model?

A: To use the Fujifilm 52mm Protector Filter, you will need to use an adapter ring, as you cannot directly attach filters to the Fujifilm X20 camera: http://bhpho.to/1k3j2Az

Q: 6. Will the original lens cap fit on with this uv filter installed?

A: Most likely yes but it depends on which lens you have.

Q: 7. Does this filter fit to x100v too? And does it need another adapter ring with x100v?

A: yes, this 49mm thread filter will fit on the X100v and you do need to attach the adapter to the lens first. Without the adapter the filter will cause a lens error.

Q: 8. Can this filter use it both sides? I have to install this filter reverse in order to use a different lens hood. Would there be same result?

A: This filter has front and back threads. And they are in reverse. So the back of the filter screws in to the lens and the front of the filter works with accessories that have a 49mm thread like some lens hoods.

Q: 9. Is 67mm Formatt Hitech UV HAZE 2A filter really multi-coated as stated in the Specs?

A: Yes it really is multi coated.

Q: 10. will this adapter ring work with the lee 100mm system?

A: Yes, this adapter is designed for the LEE 100mm system.