If you want an "album" of photos in a single LRF file you can create a Comic book of images and convert with "comic2lrf" on the command line or simply as a Comic in the Calibre GUI (my ComicLRF
utility has recently been added to Calibre).
This is very simple to do:
- Create a ZIP file and put the images you want into the zip file.
- Rename the extension from .ZIP to .CBZ
- Use Calibre to convert the file, remembering to tick the options 'Landscape', 'Keep aspect Ratio', 'Disable Sharpening'
Leave the "Number of colours" at 64, it really does help to improve image quality.