Canon EOS1 Ds MARKII Design And Performance

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Canon EOS1 Ds MARKII Design And Performance Manual pdf 11 page image

III. NEW AND IMPROVED DESIGN FEATURES 11Exposure ControlMost EF Lenses provide distance information, and this datais also considered in determining if there is a highlyreflective object, once again lessening the chance ofunderexposure. The EOS-1Ds Mark II is compatible withthe color data transmission feature introduced on theSpeedlite 580EX. When the Canon Speedlite 580EX isused with the 1Ds Mark II, the color temperature of theflash is incorporated in white balance calculations,affording a remarkable improvement in color balance accuracy.Flash sync is provided from the side PC socket and the newly strengthened hot shoe. A locking pinin the hot shoe prevents Speedlite slippage. The two connections can be used simultaneously.Hot-shoe mounted flash units can sync at 1/250 or slower. Studio flash can sync at 1/125 orslower. The PC terminal has no polarity issues and can be used safely with sync voltages up to 250V.The EOS-1Ds Mark II is compatible with Canon’s entire line of EX series Speedlites plusthe MR-14EX Macro Ring Lite and the MT-24EX Macro Twin Lite for close-ups. Wirelessflash works with the on-camera Speedlite 580EX, 550EX, MR-14EX, MT-24EX or SpeedliteTransmitter ST-E2 serving as the master, transmitting wireless signals to an unlimitednumber of 580EX, 550EX and 420EX Speedlites as slave units. The 420EX can only functionas a slave, and the MR-14EX or MT-24EX can function only as master units. The masterunit’s flash can be enabled or disabled. Even when disabled, the flash head can stilltransmit wireless optical signals. Except with the 420EX, a modeling flash can be fired.Up to 3 groups (for main, fill and background) of slave units can be set up. The slaveunit’s ID is set to Group A, B or C. The flash output ratio between Groups A and B can beadjusted automatically from 8:1 to 1:1, or from 1:1 to 8:1. The flash output of Group Ccan be adjusted through flash exposure compensation.The EOS-1Ds Mark II has a 21-zone silicon photocell that handles maximum aperture TTLmetering. There are four selectable metering modes: Evaluative, which is linkable toany AF point, Partial, which meters approximately 8.5% of the screen, Center spotmetering, which reads approximately 2.4% of the screen and has added options of AFpoint-linked or multi-spot metering, and Center-weighted average metering, whichcalculates over the entire image, but emphasis is placed in the center zone.The 1Ds Mark II, like the 1D Mark II, has seven shooting modes: Shutter-priority AE,Aperture-priority AE, Program AE, either Evaluative or Averaged E-TTL II programautoflash (21-zone flash metering), Manual exposure, Flash metered manual or Bulb.The metering range is from EV 0 to EV 20 and the ISO range is from 100 to 1600 in1/3-step increments with 50 and 3200 menu-selectable. In addition to manualexposure compensation, auto exposure-bracketing (AEB) records 3 exposures in anadjustable range of up to +/- 3 stops in 1/3 or 1/2 stop increments. AE Lock is availablein any auto exposure mode.Speedlite 580EX