All new Fujinon lenses are compatible with the currently proposed 16:9 format. However, because of the various methods of achieving the 16:9 ratio, it is important to understand how the methods of ratio conversion are achieved.

There are two types of switchable-format cameras available today. One type uses 16:9-format CCDs and switches to the 4:3 aspect ratio. The other utilizes 4:3 CCDs and switches to the 16:9 format.

When the 16:9-format CCD system is employed, it is necessary to compensate for a loss in angle of view of about 20 percent that is incurred when switching to the 4:3 aspect ratio. To eliminate this problem, Fujinon offers an optional ratio converter that is located in a four-position extender turret in studio and field lenses, and in an enlarged extender housing in new hand-held lenses.

An additional option for lenses with an 82 mm filter thread (A18X7.6) is the lightweight front-mounted converter model RCV-82SC.

What do all of the numbers and letters in lens model numbers mean?

Lens model numbers seem cryptic at first glance, but it's actually easy to break the code. Even though every manufacturer uses different letters to identify functions, at least the format is close to the same. Let's analyze Fujinon's newest ENG/EFP lens:

HA22x7.8BERM-28 HA=2/3 inch format high definition 22=Zoom ratio from wide to telephoto X=Multiplier

7.8=Minimum (widest) focal length, in millimeters B=Letter indicates flange focal distance E=Internal range extender R=Servo zoom M=Manual focus 28=Camera interface type

To get the maximum focal length of the lens, multiply the zoom ratio (22) by the minimum focal length (7.8) to get 172 mm. Engaging the 2X range extender will result in focal lengths of 15.6 to 344 mm. Remember that a high zoom ratio doesn't always yield a longer lens, e.g., 20 X 7 = 140mm versus 19 X 8.7 = 165mm. It's the resulting number (the maximum focal length) that counts.

What focal length video lens can I use to get a similar field of view as my 35mm still camera?

In order to calculate the approximate focal length video lens as compared to 35mm still lenses use the following factors. 1/3 inch video lens .133 1/2 inch video lens .178 2/3 inch video lens .254 2/3 inch 16:9 .254 35mm still lens = 28mm 2/3 inch video = 7.11mm 28 X .254 =7.11

What is Aspheric Technology?

All of Fujinon's Broadcast and HDTV ENG/EFP style lenses feature Fujinon's latest technological advancement, AT2, which combines the company's exclusive Aspheric Technology with a new inner focusing system to increase the performance of each lens.

A single aspheric element reduces distortion at wide angles, improves corner resolution, reduces glare and reflections, and allows chromatic aberration to be managed throughout the zoom range, rather than simply optimized at specific points.

Aspheric elements gain their advantages from the way light passes through them. Light passing through the periphery of a spherical element falls on a different point on the focal plane than light passing through the center (spherical aberration). This requires additional elements to correct. Since light passing through aspheric elements focuses at the same point on the focal plane, additional elements are not needed. Lenses with aspheric elements eliminate the additional weight and space required by the corrective group of elements as well as their increased potential for distortion, ghosting, and flare.

What is meant by the term "Maximum Relative Aperture"?

Maximum relative aperture refers to the "F" number of the lens at wide open iris. This is usually expressed at two positions in the zoom range for zoom lenses. The first number will refer to the lens from the widest zoom angle to the point at which the "F" number begins to become larger. This occurs due to the physical constrictions of the particular lens design and is usually referred to as the " ramping point". Most zoom lenses "ramp" , some more than others. The second number referred to in the "maximum aperture" specification is the "F" number at the maximum zoom range or telephoto position. It is important to know what the "F" number of a particular lens is and how the ramping characteristics will affect video level.

What is the V-format ratio converter and why do I need it?

All new Fujinon lenses are compatible with the currently proposed 16:9 format. However, because of the various methods of achieving the 16:9 ratio, it is important to understand how the methods of ratio conversion are achieved. There are two types of switchable-format cameras available today. One type uses 16:9-format CCDs and switches to the 4:3 aspect ratio. The other utilizes 4:3 CCDs and switches to the 16:9 format. When the 16:9-format CCD system is employed, it is necessary to compensate for a loss is angle of view of about 20 percent that is incurred when switching to the 4:3 aspect ratio. To eliminate this problem, Fujinon offers an optional ratio converter that is located in a four-position extender turret in studio and field lenses, and in an enlarged extender housing in new hand-held lenses.