PHOV

I wrote PHOV to develop X3F files from Sigma's Foveon cameras on an iPhone or iPad, without going back to a computer. Plug in the SD card with a USB-C reader and pick the shots you want; files in Files, on iCloud Drive or on an external drive work too. The originals are never changed. On the DP and SD1 Merrill, development stays true to the camera's colors, in every color mode and in black and white: I checked it pixel by pixel on a DP2 Merrill. For the other cameras PHOV uses its own development, with the camera's white balance and noise reduction. Then you can adjust exposure, contrast, highlights and shadows, temperature and saturation, sharpness and vignette with the histogram in view, or switch to black and white with the channel mixer. On the Merrill bodies there is also Sigma Photo Pro's Fill Light, to lift the shadows. White balance is set by tapping a grey spot, and the Powder…