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18.3 More Details: Contax 645
Exposure Modes
The Contax 645 manual (M) and semi-auto exposure modes (Av,
Tv) are fully supported by the IQ back. Please note that Bulb is only
supported on Contax/IQ back when used in conjunction with the Live
View function. Go to Chapter 21 (from page 169) for more information
about Live View.
Please check the relevant Contax 645 manual for more information on
exposure modes.
Ensure that exposure times are limited between 1/4000 second and
approx. 1 second to obtain the highest possible quality with an IQ back
and Contax 645. Please note that it is not possible to expose images
longer than 60 seconds with an IQ back.
ISO Settings
The Contax 645 exposure modes use the ISO value set in the IQ back.
The ISO setting can be adjusted from the camera back or in Capture
One software when shooting tethered.
Please consult page 61 of this manual for details on setting the ISO. Go
to page 53 for more information about tethered shooting.
Double Exposure Protection
It is not possible to accidently double expose an image by capturing
one image quickly after another when an IQ back is used on a Contax
645 e.g. when using the continuous drive mode.