Holder Log: Large Format

Holder Log keeps track of your sheet film holders and of everything you need to expose and develop each sheet. Which side is loaded, which is exposed, and how should it be developed? Holder Log answers that at a glance, from loading in the dark to the development sheet you take into the darkroom. FRAME • Live viewfinder that shows what your lens covers on 4×5, 8×10 or any format you add • Frames for all your lenses at once, landscape or portrait, with 35 mm equivalents • Black-and-white view that simulates yellow, orange, red, green and blue filters • Save a reference photo cropped to the frame and pin zones on it EXPOSE • Bellows extension, including telephoto lenses • Filter factors and extra compensation • Reciprocity from the datasheets of 17 Ilford, Kodak and Fujifilm films, or your own value • Zone system: spot readings give the suggested development (N−1, N, N+1 …) • Countdown timer that alerts you even when the phone is locked • Notes on movements, location with GPS and place name, and anything else DEVELOP • Every holder side shows whether it is empty, loaded or exposed • PDF development sheet that groups your sheets by development, with reference photos and all data • CSV export of everything, and an archive of developed sheets PRIVATE No account, no ads, no tracking. Everything stays on your iPhone, and you choose whether exports include GPS positions. Reciprocity values come from the manufacturers' datasheets. Check them against your own tests.