Canon eos5d Bedienungsanleitung PDF herunterladen (Seite 21)

EOS 5D Mark II’s new 21.1-megapixel full-frame CMOS sensor: The advanced single-plate

CMOS sensor in the EOS 5D Mark II achieves the highest performance of any sensor in the

Canon DSLR lineup. It shares many traits with the CMOS sensor found in the flagship

EOS-1Ds Mark III, including its 36mm x 24mm (35mm format) size,

approximately 21.1 effective megapixels with 6.4µm pixel pitch, a 4-channel

data readout, and low-pass filter design. However, this second-generation

sensor offers increased sensitivity and improved noise reduction circuitry that

enables standard ISO’s ranging from 100 to 6400 and expanded ISO ranges

from 50 to 25,600.

The EOS 5D Mark II’s sensor is

designed and manufactured entirely by

Canon using its state-of-the-art

CMOS semiconductor fabrication and

microlens-forming process. It includes a

protective, double low-pass filter design that separates

the subject image into horizontal and vertical directions,

a phase plate, and an infrared-absorption glass. (The

front side of the first low pass filter also includes a fluorine

coating to help reduce dust adhesion and a dichroic

mirror vapor deposition on the rear surface to reflect

infrared rays.)

Compared to the original EOS 5D, the gap between the on-chip microlenses on the EOS 5D

Mark II has been narrowed while the photodiode area ratio (photodiode area divided by the

pixel size) has been increased. The distance between the microlens and photodiode has been

further reduced to improve light gathering efficiency, and new color filter materials have been

added to increase light transmission while retaining accurate color reproduction. These optical

IV. PERFORMANCE AND RELIABILITY

24mm

* Package dimensions: 52.5 mm x 36.5 mm

36mm

Dichroic mirror (Reflects infrared rays)

Infrared-absorbing glass

Low-pass filter -2

(Separates image in

vertical direction)

Low-pass filter -1

(Separates image in horizontal direction)

Phaser layer

(Converts linear polarized light

into circular polarized light)

CMOS

sensor

EOS 5D Mark II Full-Frame CMOS Sensor

(Actual Size)

Low-Pass Filter Construction

Photo diode

Gap between microlenses

Photo diode area Pixel pitch

EOS 5D (8.2 x 8.2 mm)EOS 5D Mark II (6.4 x 6.4 mm)

Pixel size

Microlens Comparison (Conceptual Diagram)

Advanced Sensor Designs

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