User Guide

5.4 ISO

Push the top right button or tap ISO on the Home Screen. You will be

presented with the back’s ISO spectrum. Scroll up and down and tap

the screen to select the desired setting. A green check mark will appear

next to your chosen setting and you will automatically return to the

Home Screen. An ISO rating can also be selected from the Capture Tool

in Capture One Pro software (when shooting tethered).

The IQ280 back has an ISO spectrum from ISO 35-800. The IQ260 has

a 50-800 spectrum and the Achromatic back has a ISO range from

200-3200. The IQ250 has a wider range, at ISO100-6400. The default

sensitivity setting is ISO 50 for IQ280 and IQ260 models and ISO100

for the IQ250. The Achromatic has a default of ISO200. Sensor+

technology, built into the Phase One IQ Series models, expands the

ISO range from 140 to 3200 at 20 megapixels resolution for the IQ280.

The IQ260 models have a Sensor+ ISO range from 200 to 3200 at 15

megapixels resolution.

Long Exposure Mode – IQ260

The Long Exposure Mode is a feature integrated into the IQ260,

enbabling noise free exposes of up to one hour. The default setting

is On. When the mode is Off, the IQ260 will automatically display a

dialogbox that suggests using the Long Exposure Mode with exposures

longer than than 10 seconds. Long Exposure Mode is marked with an

L after ISO in the Home Screen. The Long Exposure Mode has an ISO

range from 140 to 800 that can be extended up to ISO3200 in Sensor

+ mode (IQ260 only).

Precautions on Long Exposure Shoots

1. Close the eyepiece shutter to block any light from entering the

viewnder.

2. When using extreme long exposure more than 5 to 10 minutes

outside in daylight, please take relevant precautions, e.g. avoid having

camera and digital back in direct sunlight.

3. Cover your entire camera with a Phase One lens wrap or similar light

proof material to eliminate stray light.

4. Remember that when you make a long exposure, the digital back will

make a black calibration after the capture of the same duration as the

exposure.

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