Panasonic DMW-LC69E Datasheet download pdf (Page 16)

Chromatic

aberration

Minimal

chromatic

aberration

Normal lens

ED lens

30 31

Lens Technology

The smaller and lighter the camera body, the greater the

hand-shake effect during shooting. LUMIX G/LEICA DG

lenses feature MEGA O.I.S., an image stabilizing function

that has been highly evaluated by compact camera users.

An internal LSI processes the output of the system's gyro

sensors approximately 4,000 times a second to provide

accurate compensation for even tiny amounts of hand-

shake. Unlike image stabilizing functions that are built into

the camera body, this highly accurate function also lets you

check the compensation effect directly through the Live View

Finder or on the LCD. The images that you capture have the

same shake-free beauty as what you see on the Live View

Finder or the LCD. The compensation effect is also carefully

matched to each lens. MEGA O.I.S. is especially effective for

hand-held shooting with a zoom lens.

MEGA O.I.S. (Optical Image Stabilizer)

Without multicoating With multicoating

Aspherical lens Spherical lens

These cutting-edge technologies support the compact size, light weight, and high-quality images of the LUMIX G Micro System.

The LUMIX G/LEICA DG lenses are manufactured by

an integrated production system in the Panasonic

Yamagata Plant in Japan. From lens processing to

assembly, inspection, and individual packaging, all

processes are conducted in Clean Rooms according

to rigorous environmental standards. For example, to

inspect aspherical lenses, we use an instrument called

the UA3P Ultra-Accurate 3D Profilometer, which was

originally developed by Panasonic and now plays an

essential role in the development and manufacturing

activities of many optical device manufacturers. Using

this instrument, with its measurement accuracy

of 1/10,000 mm, we conduct objective, numerical

evaluations. These criteria are then used to determine

the presence of flaring, the color of coatings, the

operating feel of the focus ring, etc., in order to ensure

high-quality production control. As a result, the quality

of Panasonic lenses has

gained high worldwide

acclaim for accuracy and

image quality.

In conventional digital SLR cameras, contrast AF is

more accurate than phase difference AF, but it has

a slower focus speed. LUMIX G/LEICA DG lenses

overcome this problem by incorporating a unique

stepping motor in the drive system. A screw unit

integrated with the motor shaft moves the focus lens

directly, without relay gears or cams. Auto focusing is

swift and accurate. Some lens models are equipped

with a linear motor to further reduce drive noise –

ideal when recording movies with sound. The number

of mount signal contacts has been increased from the

9 used in conventional Four Thirds System cameras to

An Original Lens Drive Motor for High-Precision, High-Speed Contrast AF

Stepping motor

in drive system

Focus lens unit

Rack

Guide pole

11, so information transfer between lens and camera

is faster. This has also helped achieve a contrast AF

system that excels in both speed and accuracy.

To assure superior image quality while reducing size

and weight, each LUMIX G/LEICA DG lens features a

number of aspherical lenses that effectively prevent lens

aberration, such as spherical and distortion aberration.

Each aspherical lens has the effect of several spherical

lenses, so a higher magnification ratio can be achieved

with fewer lenses. The result is smaller overall size and

weight. Aspherical lenses are extremely difﬁcult to produce,

however, because they demand high dimensional accuracy.

In the past this restricted the applicable lens shapes and

materials, but Panasonic has made great strides in this

area. Our Yamagata Plant began developing cutting-edge

production technologies for molded lenses early on, and

today the plant manufactures a wide variety of lenses

– including concave lenses that have a large thickness

difference and measure a

mere 0.3 mm at the thinnest

part. The aspherical lenses

with superb image rendering

ability produced at this plant

now see widespread use.

Aspherical Lenses

In a conventional lens made only of optical glass, it

becomes difficult to correct chromatic aberration when

the focal length is long or the angle of view is wide, thus

resulting in contrast degradation or color bleeding. This

problem has been solved by Panasonic's Extra-Low

Dispersion (ED) lens. It suppresses the prism's color

separation effect to correct

lo n g itu d i nal ch ro m a tic

aberration at the telephoto

zoom setting and chromatic

difference of magnification

at the wide-angle setting.

The ED lens is used mainly in

LUMIX G/LEICA DG telephoto

lenses and wide-angle zoom

lenses to render sharp, high-

contrast images with clear

colors from corner to corner.

Extra-Low Dispersion Lenses

Utmost caution is exercised in coating the LUMIX G/LEICA

DG lenses to suppress ghosts and flaring, while ensuring

optimum color balance. In addition to a standard broadband

anti-reﬂection coating, LUMIX G/LEICA DG lenses feature a

coating that reduces the reﬂectance of light that enters at

an angle. This multicoating process is widely used on lenses

with a small radius of curvature, such as those in ultra-

wide-angle lenses and fisheye lenses. It greatly improves

the image rendering performance when shooting against a

light source. Moreover, the

bonded surfaces of cemented

lenses are also given an

original multicoating process

to further reduce reflection.

This results in high-quality

images with superb clarity.

Multicoating Process

Lenses Manufactured

with Uncompromising Devotion

to High Image Quality

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Panasonic DMW-LC69E Datasheet Page 16

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