Long Exposure
The IQ4 determines the long exposure capabilities of the XF IQ4 Camera
System, and all relevant settings are syncronized between the IQ4 and XF
Camera Body. The IQ4 is capable of long exposures up to 60 minutes in
duration, selected directly from the Front Dial of the XF. No special Exposure
mode is required when using the Phase One XF, however Manual exposure
mode is recommended.
Select the Aperture using the Side Dial. Compose using the viewfinder or Live
View, focus and then trigger the shutter release. The shutter remains open for
the allotted time and the top screen of the XF will show the elapsed time (in
secs). Shutter speeds longer than 1.0 second automatically change the leaf
shutter option (if available) over to the camera’s integrated focal plane shutter.
Noise Reduction (Dark Frame Subtraction)
In order to minimize noise, an additional dark frame is captured for the same
duration as the capture and subtracted from the original exposure. This is fully
automatic, and there is no need for you to intervene. After the elapsed
exposure time, the screen displays a count-down in seconds during the dark
frame subtraction, and the icon in the top-left of the screen changes from an
iris to a crescent moon to denote the operation. The Stop and Save option
ends the exposure and automatically starts the dark frame capture. If you
selects Abort, the image is not saved. When the noise reduction (dark frame)
process is finished, the camera is ready to capture another image.
3.30 min exposure
at 3.18 min
Black frame capture
at 3.12 min
96
Long Exposure
XF IQ4 Camera System Manual |
