Taurus Tunable Filter - Seven years of observing

The Taurus Tunable Filter (TTF) has now been in regular use for seven years on the Anglo-Australian Telescope (AAT). The instrument was also used for three years (1996-1999) on the William Herschel Telescope (WHT). We present a brief review of the different applications in order to illustrate the versatility of tunable filters in optical/IR spectrophotometric imaging. Tunable filters are now either planned or under development for 6-10 m class telescopes which ensures their use for years to come.