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I'm looking for an image viewer for Windows which always displays a full-screen view of the newest image a specific folder. Preferably with raw image format support (Nikon) and free or inexpensive (< 20 Euros).

FastPictureViewer works very well, but since I only need this one feature, the price is a bit too high (49,99 USD).

The use case: I'm shooting product photos with a Nikon D50 in USB PTP (picture transfer protocol) mode, directly connected to a Intel NUC computer connected to a TV. Seeing the latest image automatically on the screen directly after shooting makes it very easy to adjust the lights and camera settings.

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You can easily monitor a given directory for new files using python, see here for 20+ answers, rawpy can convert almost any cameras raw format to an 8 bit RGB array in 3 lines of code, then you have a choice of possible ways to display the image and lots of online help. You could display the image for your self from within python or you can write your converted file to a fixed name tiff & use ImageMagick to display it with automatic updating.

If you opt to display it within the python you could even use matplotlib to display the image with the histogram along side or as an overlay.

  • Free, Gratis & Open Source,
  • Cross Platform - will work on Windows, Mac OS-X or Linux you don't mention which you need,
  • You can tailor the conversion to match your display,
  • You can get it to do exactly what you decide you need.

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