User Guide
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17.0 IQ1 Back for Contax 645
The Phase One IQ1 (Contax mount) digital back is designed specically for the
Contax 645 camera. The IQ1 back communicates with the Contax 645 through
a fast internal electrical computer interface and utilizes TTL phase dierence
detection type auto focus system.
17.1 Mounting IQ1 Back on a Contax 645
1. Place the bottom of the IQ1 back in the locking mechanism.
2. Press the button at the top of the back with your thumb and lever the back
into place.
3. Release the button to secure it into position.
4. Lock the IQ1 back into place by sliding the switch left towards the release
button. (See switch circled below left).
N.B. It is important to ensure that the bottom part of the IQ1 back is attached
correctly before the upper locking mechanism is pressed together.
Removing the IQ1 back from the Contax 645
1. Slide the locking switch to the right position.
2. Press the button (circled left) to unlock the back. (Ensure that the back is
supported in your hand before pressing this button).
3. Gently lever away the top of the back rst. Be careful with the contacts
and protective glass on the back.
N.B. Your IQ1 back should always be protected by its plate when it is not
attached to the camera.