FUJIFILM Announces The Development Of Two New Advanced Technologies For Most FUJINON 4K And 8K Lenses

FUJIFILM North America Corporation is pleased to announce the development of two new advanced features—ARIA and RBF—that can be used with many of FUJINON’s 4K and 8K ultra-high-definition (UHD) broadcast lenses*1. ARIA stands for Automatic Restoration of Illumination Attenuation and RBF refers to Remote Back Focus. Both new features will operate with several of Sony’s latest series of 4K UHD cameras*2.

ARIA (AUTOMATIC RESTORATION OF ILLUMINATION ATTENUATION)

The ARIA technology works through a sharing of lens design characteristics and positional metadata between the FUJINON broadcast lens and the camera. In the optical design of broadcast lenses, engineering trade-offs must be made to provide desirable zoom ratios at usable size and weight. As a result of these compromises, two major optical phenomena have always existed. The ARIA feature eliminates both.

The first optical phenomenon is F-Stop, or exposure ramping, at the telephoto end of the zoom. Currently, this effect can be seen when the lens zooms from wide to telephoto, as it loses exposure beyond a specific focal point. This ramping curve is part of the lens design and is consistent among all serial numbers of each model. With ARIA turned on from the camera remote control panel (RCP), the lens transmits the known focal length position from internal 16-bit encoders and the F-Stop/exposure ramping curve. In turn, the camera introduces the appropriate amount of gain to seamlessly counter the darkening of the image, resulting in consistent exposure level throughout the zoom range of the lens.

The second phenomenon is known as relative illumination, a result of all lenses being slightly brighter in their “sweet spot” at the center than at the edge of the image. In instances when this is visible, it is often referred to as corner shading or portholing. Again, here, the relative illumination characteristic of the lens is known and consistent between all serial numbers of a given model. With ARIA turned on, the lens communicates with the camera, providing relative illumination data throughout the full range of the lens, which then corrects the corner shading, giving the picture a consistent, flat illumination from the center to the edges of the image.

 RBF (REMOTE BACK FOCUS)

All broadcast lenses require a calibration of the lens to the camera sensor to ensure proper performance.   This calibration, commonly known as back focus, may require adjustments at various points due to factors such as a significant temperature fluctuation. This manual adjustment is typically performed locally by a camera operator or technician, often in an OB van at sporting and entertainment events, There are many instances where it is challenging or impossible to adjust the back focus from the lens due to the nature of the setup, for example, when it is being mounted on a helicopter, SkyCam, robocam, or other location with limited accessibility.

*2 – Please consult with Sony regarding the latest list of cameras that are compatible with lenses featuring both the ARIA and RBF technologies.

Most of FUJINON’s 4K and 8K broadcast lenses feature what is known as a “Floating Back Focus” system, whereby a servo motor is used when setting back focus. The unique, new RBF feature is operated solely by the video operator in the OB van or control room via the camera RCP and does not require that anyone be at the camera position. The video operator has complete control of the zoom, servo focus, and back focus functions of the lens from the standard camera RCP, thereby having the ability to remotely adjust the back focus and calibrate the optical system to ensure optimal performance from all camera positions at all times.

With RBF, back focus can now be set at any time or place, even when the camera operator is not available, if the lens is not accessible by a person, or if it is not safe to access the lens.

*1 The following new and current FUJINON 4K and 8K lenses are compatible with the ARIA and RBF functions, respectively:

ARIA

  • 4K Box Lenses: UA27x6.5, UA70x8.7, UA80x8, UA107x8.4, UA107x8.4 AF and UA125x8
  • 4K Portable Lenses: UA13x4.5, UA14x4.5, UA18x5.5, UA18x7.6, UA22x8, UA23x7.6, UA24x7.8,
  • UA46x9.5 and UA46x13.5
  • 8K Box Lens: HP66x15.2 (Based upon the future lens introduction schedule)
  • 8K Portable Lens: HP12x7.6 (Based upon the future lens introduction schedule)

 RBF

  • 4K Box Lenses: UA27x6.5, UA70x8.7, UA80x8, UA107x8.4, UA107x8.4 AF and UA125x8
  • 4K Portable Lenses: UA13x4.5, UA22x8, UA24x7.8 (Fall 2020), UA46x9.5 and UA46x13.5
  • 8K Box Lens: HP66x15.2 (Based upon the future lens introduction schedule)
  • 8K Portable Lens: HP12x7.6 (Based upon the future lens introduction schedule)

 

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