Canon EOS1 Ds MARKII Design And Performance

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Canon EOS1 Ds MARKII Design And Performance Manual pdf 12 page image

III. NEW AND IMPROVED DESIGN FEATURES 12DIGIC Image ProcessorSpeed of OperationRecording ControlsThe next-generation DIGIC II Image Processor in theCanon EOS-1Ds Mark II, as well as in the EOS-1D Mark II,features ultra-fast response and high performance. Thesingle board design replaces the multiple boards of the1D and 1Ds and the DIGIC II itself is a single-chip unitwhereas the 1D and 1Ds had two separate ImageProcessors. The DIGIC II has a new signal processingalgorithm, 8-channel signal reading and faster image datasignal processing. Color reproduction of high-saturation, bright subjects is improved.Auto white balance is more precise and accuracy in low color temperatures, such astungsten light, is better. False colors and noise in low light have been reduced.The DIGIC II Image Processor enables the EOS-1Ds Mark II to write to card at speeds upto 5.8 MB/sec, depending on the CF card’s write speed capability, whereas the 1Dswrites at just under 2 MB/sec.The EOS-1Ds Mark II uses double data rate, synchronous dynamic random accessmemory, DDR-SDRAM, first seen in a digital SLR in the EOS-1D Mark II. This high speedbuffer memory is one of the keys to the 1Ds Mark II’s ability to capture 16.7 megapixelfiles at 4 frames-per-second for as many as 32 JPEGs or 11 RAW images. With its 4.1megapixels, the 1D could do 21 JPEGs or 16 RAW images at 8 frames-per-second. TheEOS-1Ds, with 11.1 megapixels, can fire off 10 frames at 3 fps. The speed king, theEOS-1D Mark II, can fire at 8.5 fps for up to 40 JPEGs or 20 RAW consecutive frames.During continuous high-speed shooting, mirror blackout time becomes a seriousproblem. The faster the mirror comes down and stabilizes, the clearer, sharper andbrighter the finder image is, giving a much more accurate and less fatiguing view andgiving the predictive autofocus more time to do its job. The EOS-1Ds Mark II shares withthe EOS-1D Mark II, EOS-1v, 1D and 1Ds a Canon innovation called Active Mirror Controlwhich replaces conventional suppression of mirror rebound shock with a mechanicalsystem which incorporates a hook on the backside of the main mirror. The hook holdsthe mirror in place when it flips down, reducing mirror bounce and shake and confiningit to a much shorter duration. The result is a mirror blackout time of 87ms.In its normal configuration, the EOS-1Ds Mark II has the same shutter release time lagas the EOS-1D Mark II, the EOS-1D, the EOS-1Ds and the EOS-1v film cameras, 55ms,when stopping down within 3 stops of maximum aperture, but (as with the 1D Mark II)the delay can be reduced to 40ms at maximum aperture with Personal Function 26,“shorter shutter release time lag.” The startup time after the power switch is turned onis about 0.3 sec., half the 0.6 sec. of the EOS-1Ds.The EOS-1Ds Mark II has an increased range of recording quality selections and settingscompared with the 1Ds. The JPEG pixel count has four options: L (16.6MP), M1 (8.6MP),DIGIC II Image Processor