Panasonic AG-HPX250 Manuel - Page 3

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22x Panasonic Lens — Zooming in on New Levels of Image Expression

Packed with Panasonic Optical Technology

The high-performance zoom lens was developed specifically for

professional HD video production. While inheriting the wide-angle

capabilities of the DVX and HVX Series, it adds the same level of

operating ease as you'd expect from an interchangeable lens model for

broadcasting and other professional uses. Combining 18 lens elements in

12 groups, this advanced lens unit further adds a UHR (Ultra High

Refractive) glass element, a low dispersion element and aspherical

lenses. This newest optical technology can provide high resolution.

In addition, it is combined with a unique Panasonic digital signal

processing technology called Chromatic Aberration Compensation

(CAC) to minimize color bleeding in the surrounding image and achieve

rich expression with finely rendered nuances and excellent shading.

Zooming from 28mm to 616mm (35mm equivalent), this 22x zoom lens

covers a wide field of view, from wide-angle to telephoto, without a

conversion lens.

Wide 28 mm

Tele 616 mm (22x)

Three Manual Rings — Zoom, Focus and Iris

The lens unit is provided with three rings — a mechanical (cam-driven)

zoom ring, a focus ring, and an iris ring. You can operate them manually

almost like an interchangeable lens including rugged operation of

zoom ring.

High-Sensitivity, Low-Noise U.L.T. Image Sensor

U.L.T. Image Sensor

High-Sensitivity F10*, 2.2-Megapixel, Low-Noise U.L.T. Image

Sensor and Optimized Signal Processing Circuit

The AG-HPX250 features the Ultra Luminance Technology (U.L.T.)

1/3-type 2.2-megapixel 3MOS image sensor that is incorporated in our

shoulder-type P2HD camera recorders. This advanced image sensor is set

to maximize the performance of the lens and signal processing circuit

under standard shooting conditions. Progressive Advanced Processing

(PAP) technology, which is driven by 3D adaptive processing, has also

been further refined to enable high-sensitivity F10*, low-noise shooting

in dimly lit places.

*AG-HPX250 sensitivity is selectable, F10 is PAP Filter Type1 and F7 is PAP Filter Type2 in 59.94Hz mode.

In 50Hz mode, F11 is PAP Filter Type1 and F8 is PAP Filter Type2. The default setting is PAP Filter Type2.

Flash Band Compensation

In contrast with the CCD image sensor, which accumulates still images

of single frames that are exposed with identical timing, the MOS image

sensor uses a rolling shutter system that sequentially scans each line of

pixels. This lowers power consumption and enables high-speed drive, but

Optical Image Stabilizer, Digital Zoom, and ND Filter

• Hand-shake correction with the Optical Image Stabilizer (OIS).

• Digital Zoom function.* It can be assigned to an user button and close

up to 2x, 5x, and 10x. In combination with the optical zoom, this

function provides a telephoto capability up to 220x.

• Four-position (OFF, 1/4 ND, 1/16 ND, 1/64 ND) optical neutral density

filter wheel.

* The digital zoom cannot be used while operating the Dynamic Range Stretch (DRS) or Scan Reverse

functions. If either function is operated while digital zooming, the zoom will be automatically turned off.

Also, Flash Band Compensation (FBC) will not operate while digital zooming.

22x optical zoom x

10x digital zoom (220x)

because the exposure timing differs for each line, when an external flash

is used, it tends to produce images where the brightness is divided

between the top and bottom of the image. This is called the flash band

effect. The AG-HPX250 is equipped with highly accurate flash band

detection and compensation software. By generating pairs of frames

containing flash bands, and frames in which a flash extends from the

previous frame to the entire screen, and then using the compensation

process to adjust the level, the flash band effect of MOS-based imagers

is eliminated.

Time Flow

Focus Ring

MOS

Output

Image Sensor

Image

Flash

MOS Output Imager

Zoom Ring

Iris Ring

After

Compensation

Flash Band

Compensation

Process

After Compensation Imager