Five things to look out for

Print sizes range from small credit card Instax Mini, to 8.6 x 8.8cm Polaroid prints or 10.8 x 8.6cm Instax Wide.

Not all instant cameras allow the flash to be disabled, or exposure to be adjusted beyond +/- 1EV.

The price of instant print media differs between £1 and nearly £2 per print, so factor that in.

Power options vary from two AAs to four AAs, and from two CR2 cells to a rechargeable lithium battery.

The time it takes to achieve a finished print varies from 90 seconds to between 10 and 15 minutes for Polaroid.