This LEE100 82mm wide angle adaptor ring has an extended thread to specifically fit the Fuji GF23mm, which will not take the normal 82mm wide ring.
Can also be used on the Fujifilm GF 250mm f4 R LM OIS WR Lens.
It can also be used on some Tamron zooms which will not take the regular wide angle 82mm ring.
$109.95