Canon Selphy 510

Image by Arty Smokes (deaf mute)
Other than cameras, I’m not really a fan of ‘gadgets’, but I love this diminutive printer. With an A5-sized footprint, it prints out 6×4 inch photos in good quality, quickly and easily.
Simply connect a digital camera or a PC/Mac via a USB lead and a minute later, you’ve got a lovely print-out that will last "forever". (Canon archive paper is said to to be guaranteed for 100+ years).
Ink cartridges come in a pack with just the right amount of paper and the price is pretty competitive. If I buy a battery pack, I could take it out and use it for "instant prints", since it takes about the same time to print a sheet as a Polaroid camera does, and it’s not a lot bigger. The back of the prints is even laid out like a postcard, so you can add a stamp and pop your photos in the post.
Mine was an absolute steal on fleaBay for 6 quid including postage!
LARGE.
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