Canon EOS 1D Mark III Witboek - Pagina 14

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The EOS-1Ds Mark III is compatible with UDMA (Ultra Direct Memory Access), a new CF

card specification (CompactFlash Specifications Revision 4.0) enabling high-speed writ-

ing to the CF card. With a UDMA CF card, the high-speed data transfer is about twice as

fast as the EOS-1D Mark III (about 3 times as fast as the EOS-1Ds Mark II). Although the

EOS-1Ds Mark III has twice as many pixels as the EOS-1D Mark III, the writing speed per

file is about the same as the EOS-1D Mark III, which is quite amazing.

The camera is compatible with SD memory cards including SDHC (SD High-Capacity)

cards. The writing speed with SD cards is the same as that of the EOS-1D Mark III.

Viewfinder

Large, bright viewfinders are an inherent advantage of full-frame sensor DSLR cameras.

The viewfinder of the EOS-1Ds Mark III incorporates a totally redesigned pentaprism and

refined eyepiece optics to make the viewfinder performance of the EOS-1Ds Mark III the

best in its class. Remarkably, the viewfinder provides the highest magnification and widest

coverage in the history of EOS-1 series cameras, including film models, approximately

0.76x and 35°. This is a substantial improvement over the EOS-1Ds Mark II. The new

finder also corrects the distortion in EOS-1Ds series cam-

eras to make the large viewfinder look more natural. The

100% viewfinder coverage, approximately 20mm eye-

point, -3 to +1 dpt dioptric adjustment range, and eye-

piece shutter are the same as the EOS-1D Mark III's. It is

now an even greater pleasure to look through the finder

and the point of focus is much easier to find and follow.

Major Viewfinder Specifications

Coverage [Approx. %]

Magnification [Approx. X] (Viewing angle [°])

Eye point

Dioptric adjustment

As with the EOS-1Ds Mark II, glass with a high refrac-

tive index is used for high performance. To match the

higher viewfinder magnification (wider viewfinder cov-

erage), the pentaprism and SI prism have been made

larger, necessitating a change in the top

exterior cover of the camera's body.

The lens type and glass selection have

been changed to make the eyepiece

lens larger. By having 4-lens elements

in 4 groups for the eyepiece optics,

flare is suppressed.

IV. DISCUSSION OF NEW AND IMPROVED FEATURES

Item

1Ds Mark III

100

0.76 (35.0)

Viewfinder Coverage Comparison

EOS-1D Mark III coverage

EOS-1Ds Mark II coverage

EOS-1Ds Mark III coverage

1Ds Mark II

100

0.70 (31.9)

0.71 (32)

Approx. 20 mm

-3 - +1 dpt

Viewfinder Optics 1

SI lens 1

SI mirror

SI lens 2

Metering

sensor

V-LCD

prism

V-LCD

Eyepiece lens

1D Mark III

100

0.76 (28.3)

SI-LCD

Pentaprism

Backlight lens

SI-LED

Metering lens

Condenser

lens

Focusing

screen

SI prism 1

SI prism 2

H-LED

H-LCD prism