[swibco79]

各位，本人最近對鏡頭的變焦有興趣。現在用緊dc，想轉dslr。
dc變焦會用光學 - e.g. 35-105mm = 3x optical
DSLR好少講光學，有時看到鏡頭寫上18mm-200mm or 100mm-300mm。
我想知道有什麼辦法一睇個range (e.g. 18-200mm)便知道可以有多少光學變焦呢?
May be I sound silly, but I get used to zoom in D.C :-)
Please help :)

[allanyiu]

一除咪知囉! 200mm/18mm = 大約 11 倍!

[swibco79]

Thanks for clearing, Allan Yiu

[BoboAbel]

Not really! When U look at those DC listed 10X optical zoom, the label is about 300mm, 12X for 420mm. So, 200mm should be around 7X.