BACKGROUND
Instax
is a brand of instant still cameras and films
marketed by Fujifilm since the late 1990s. There are two formats
of Instax film and cameras-the original "wide" format which gives an image
approximately 6 cm x 10 cm, and a "mini" format of 62mm x
46mm.

The films and cameras are based upon the
improvements Kodak made to Polaroid's SX-70 instant film system in the
instant film cameras it sold in the 1970s and 1980s,
namely the ability to expose the film through the rear of the photograph, and
the reversal of the order of the dye layers so that development in the blue
layer is visible first. As a result of these changes the image does not need to
be taken via a reflex mirror in order to reverse the image (as all Polaroid
integral film cameras do); and colour balance and tonal range are improved over
Polaroid integral instant films. As well Fuji's decision to integrate the
pressure plate springs and electrical power sources into the camera bodies
rather than the disposable film pack itself helps make the Instax system more
economical per exposure than Polaroid's
equivalents.

Although Kodak itself ceased
production of instant film cameras when it was successully sued by Polaroid for
patent violation, the Instax cameras are made and marketed with Polaroid's
permission and as a result cannot be officially distributed in certain
territories such as the USA, although both film and cameras are readily
available there through grey market sellers, and Polaroid itself has sold a
camera compatible with the Instax mini system (the Polaroid Mio) in the USA.
With Polaroid ceasing production of instant films in 2008 the Instax system will
remain the only integral instant film system in
production.

(credit: Wikipedia)