[benny0603]

保養包唔包除塵.

[Obi-Wan]

for about dust, every consumer level lens[ after use will have dust inside due to thermal expansion of air (or argon, nitrogen??) during use and contraction during storage. all u can do is FORGET IT, my 17-85IS got over 100 dust particles inside, still can be usable

enjoy photography la, don't worry much about dust

[zeven]

一粒已經叫救命...支鏡分分要每日洗一次了...
L鏡就隔幾年洗一次吧~