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User Manual for Formatt Hitech 77mm -20 UV Filter Click to enlarge the picture
Contents of the user manual for the Formatt Hitech 77mm -20 UV Filter
- Product category: Underwater Filters Formatt Hitech
- Brand: Formatt Hitech
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Formatt Hitech Underwater Filters
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User manual for the Formatt Hitech 77mm -20 UV Filter contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Formatt Hitech product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Formatt Hitech user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Formatt Hitech product will considerably shorten its lifespan!
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Product description The Formatt Hitech 77mm -20 UV Filter is 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 77mm -20 UV 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. When used, the Formatt Hitech 77mm -20 UV 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. -
- 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
- Non-coated
- 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
UPC: 886235148119 In the Box Formatt Hitech 77mm -20 UV Filter Filter Case Table of Contents
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Technical parametersFormatt Hitech BF 77CLUV-20 Specs | Filter Factor | 1.25 (+0.3-Stop) | | Circular Size | 77 mm | | Front Accessory Thread / Bayonet | None | | Filter Material | Glass | | Ring Material | Aluminum | | Coatings | None | | | | Package Weight | 0.15 lb | | Box Dimensions (LxWxH) | 4.0 x 3.9 x 0.8" |
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