[grandlun]

>>我試過有事，相機無反應，on/off again都唔得
>>但拆電再開就無事了

原因的確係因為hang 機...
因為個on/off switch 其實唔係斷電...你可以理解為on/off mode...同你揀mode 個switch 係一樣geh 野...

所以hang 左你咪switch 唔到on 同 off mode...要拔電 HARD RESET

[hello_manman]

個人認為,先不論唔關相機下換鏡頭有無影響
係唔係應該愛惜手上既器材,這樣諗才叫正確呢??

我相信關上電源才換,不會省下太多時間
別為一兩秒既靚景,一個唔好運下而燒機燒鏡頭

[Obi-Wan]

老兄，我部30D就係開關得多咁就short咗，咁我關咗機先換鏡未仲快d整瓜部機！

[digistone]

Better to avoid to switch on the camera to change lenses.Due to when camera switch on there are elcetricity current go thru all over the camera body and the lence. like when you unplug the socket at your home appliance, you will see some sparking lighting . this can apply to the camera as well.

[Obi-Wan]

digistone
seems dslr circuit has a much smaller voltage than home appliance, there should not be spark

[calwkf]

我多數都會熄左部機先換鏡~

但有時都會唔記得左, 但係未試過 hang 喎~

[tomatofamily]

ＣＭＯＳ在ＯＮ時會產生statics，因而吸dust. (no good in typing Chinese).