THE FILE FIELD GUIDE

.iiq

Phase One RAW Image

Images

IIQ is Phase One RAW. Check camera/mode support; transferring the RAW alone may not transfer Capture One adjustments.

Main use: Develop medium-format camera RAW captures
Data type: Binary data

All sections, questions and sources

Content reviewed：2026-10-19 · Editor：Kai

Opening steps

Choose your environment or purpose to see its steps.

Compatible Capture One or another supported processor

Preserve the original and inspect a working copy in a compatible application.

Identify camera and capture mode.
Import a copy into compatible software.
Inspect color, lens correction and export settings.

Inspect the received file and its requirements

Establish dependencies and settings before proceeding.

Match processor and camera support.
Locate session/catalog and adjustments.
Agree output color space and bit depth.

Menu labels and support vary by app, OS and version. Preserve the original before making changes.

Troubleshooting by symptom

RAW unreadable: check camera/IIQ-mode support.
Edits absent: inspect adjustment delivery.
TIFF color differs: compare profiles/export processing.
Slow processing: inspect resolution, memory and disk space.

IIQ → TIFF / JPEG

Export with deliberate size, profile and bit-depth settings.
Reopen the output and check it against the preservation points in this guide before handoff.

Processed images do not replace RAW or complete session information.

Manage RAW and adjustments together

For editing handoff use a supported original/package workflow; a JPEG does not transfer RAW settings.

Source for these steps：Capture One · Phase One RAW files option / Capture One · File formats for processing and export / Adobe · Cameras supported by Camera Raw

Worked example: checks before handoff

Example: create print TIFF and proof JPEG and check tones/profiles while retaining IIQ.

Source for these steps：Capture One · Phase One RAW files option / Capture One · File formats for processing and export / Adobe · Cameras supported by Camera Raw

Related-format differences

Related-format differences
Format / method	Purpose and preserved information
.iiq	Develop medium-format camera RAW captures
TIFF / DNG	Processed output / another RAW representation.
IIQ → TIFF / JPEG	Processed images do not replace RAW or complete session information.

Handling and security

Check client and capture-data sharing authorization.

Questions and answers

Always uncompressed?

IIQ modes vary by camera.

Same as EIP?

EIP is a separate packaging workflow.

Delete because it is large?

Choose retention according to future RAW needs.

Format facts: name, steward and MIME type

Formal name: Phase One RAW Image
Steward / specification: Capture One
MIME type: Consult the producer or delivery system. The extension alone does not establish a MIME type.

Primary and official sources

Software documentationPhase One RAW files option
IIQ compression and capture data.
Capture One · Link checked：2026-10-16
Software documentationFile formats for processing and export
RAW originals versus processed exports.
Capture One · Link checked：2026-10-16
Software documentationCameras supported by Camera Raw
RAW support by camera model and required version.
Adobe · Link checked：2026-10-16