Implementing PHOTARCH in a studio, museum, or field environment
One of the core strengths of PHOTARCH is its adaptability. The method is designed to work with a range of camera systems, lighting conditions, and institutional budgets — as long as its principles are respected.
This page outlines the minimum and recommended technical requirements for producing PHOTARCH-compliant images, from cameras and lenses to lighting and colour calibration.
Camera & Lens
PHOTARCH is agnostic to brand or sensor size. However, certain minimum standards are recommended:
- Minimum resolution: 24 MP (megapixels)
- Sensor: APS-C or larger (full-frame or medium format preferred)
- Lens: Prime or macro lens with low distortion
- Recommended focal lengths: 50–120mm (full-frame equivalent)
Mirrorless or DSLR systems are preferred for their manual control and RAW shooting capabilities, but high-end compact cameras or even smartphones can be used for training and educational purposes.
Scale and Colour Control
- Use of scale bars marked in both cm and mm
- Standard colour targets (e.g. X-Rite ColorChecker Classic or SG)
- Colour targets must be in the same light as the object
- Custom ICC profiles encouraged for optimal rendering
Consistent colour profiling ensures interoperability across platforms and time, especially when integrated with image databases or machine-learning datasets.
Software & File Format
- Capture in RAW format (e.g. .CR3, .NEF, .ARW)
- Post-processing in software that supports ICC workflows (e.g. Lightroom Classic, Capture One)
- Export as 16-bit TIFF (master), and JPEG (access copies)
- Embed EXIF/IPTC metadata directly or via sidecar files
All master files should be archived with non-destructive edits preserved. TIFFs may include embedded colour profiles and resolution metadata.
Optional but Recommended
- Repro stand or tripod with geared column or rail system
- Tethered capture workflow for immediate review
- Grey card for exposure verification
- Backup system
Summary Table (Minimum vs. Recommended)
Component | Minimum | Recommended |
---|---|---|
Camera | 24 MP APS-C | Full-frame or medium format |
Lens | Fixed lens | Fixed 50–120mm macro |
Lighting | One LED panel | High-CRI LED or strobe with modifier |
Colour | X-Rite Classic | X-Rite SG + ICC profile |
Software | Adobe Camera Raw | Lightroom Classic / Capture One |
References
- X-Rite (2024). ColorChecker SG Documentation. X-Rite Global.