User Guide
154
TTL ash
Using TTL ash with the Contax 645 camera and IQ1 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 dierently
than lm and this cannot be communicated to the Contax.
Image Orientation
The CCD in the IQ1 back is positioned in a landscape orientation. However, the
IQ1 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.
17.4 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 IQ1 back is only intended for
use with a Phase One FlexAdaptor or other large format adaptors.