Expodisc 58mm White Balance Filter 10/04/2008 Bossbot Wong Leave a comment My say on Expodisc 58mm White Balance filter. Read more Hobbies Canon, DSLR filter, Expodisc, Expodisc 58mm, expodisc digital white, expodisc review, expodisc white balance, expodisc white balance filter, expodisk, white balance, White balance filter