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LCD Projector with SD or Flash Card

By DRyan ·
I'm looking at a couple of projectors (Canon and Panasonic) that have an SD or Flash card slot. They can be used to show pictures or presentations without the use of a laptop. I am confused about the format they use for presentations. You need to convert the powerpoint file into JPG images. They must be in the Efix 2.2 format (Digital Camera Format). Are all JPG files in this format? How can I test a JPG to find its format? Does anyone use a projector with a card interface? How does it work?
Thank you,

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