Birchbark panels found on Gribshunden shipwreck, photographed with RTI (Reflectance Transfomation Imaging).

Panel BLM-29704-17:

Panel BLM-29704-103:

Equipment used for photography:

Camera: Sony A7RV, DSLR, Full-Frame.

Image: 3:2 format, 60 MP (9504x6336).

Lens: Sony FE 50mm, Full-Frame.

Settings first session (BLM-20704-103): manual focus, shutter 1/80, iris 4.5, ISO 800, White Balance 5500.

Settings second session (BLM-20704-17): manual focus, shutter 1/80, iris 4.5, ISO 2000, White Balance 5500.

Remote control: Monitor+ app on Samsung Android tablet.