Crop to longer focal lengths
Crop photos to 35, 40, 50, 70, or 90 mm (GR IIIx: 50, 57, 71, 100, or 128 mm), with the live view, focus, and exposure following the crop. A Frame Only mode shows the crop frame and keeps the full photo.
In progress in pull request https://github.com/ahonn/GRKit/pull/77.
In Progress