User Guide
163
TTL ash
Using TTL ash with the Contax 645 camera and IQ back will result
in a 2 f-stop overexposure. When using TTL ash, the exposure
compensation on the ash unit must therefore be set to –2 f-stops.
This overexposure happens because the CCD element reects light
differently than lm and this cannot be communicated to the Contax.
Image Orientation
The CCD in the IQ back is positioned in a landscape orientation.
However, the IQ back has an internal sensor that detects when it
has been rotated. Thus, when the camera is rotated and an image is
captured in portrait position the image will appear correctly oriented on
the LCD and in the Capture One application.
18.4 Flash Lead Connection
A ash cable is always connected to the Contax 645 camera body.
The ash sync cable must not be connected to the camera back when
used on a Contax 645. The ash sync connector on the IQ back is only
intended for use with a Phase One FlexAdaptor or other large format
adaptors.