[inter]

本人是初學者...有問題請教???
1)咩係3 倍光學變焦??
同1倍,,,2倍有咩唔同??
2)焦距由 35 – 105mm 是什麼東西??有咩用??
3)canon影相時鏡頭可以伸長縮短
同sony t1口t3 唔可以伸長縮短
邊個好d??有咩唔同??
thanks of you

[Wade]

1) 光學變焦係指鏡頭光學變焦比率
光學變焦 = tele / wide

e.g. 35 - 105mm
光學變焦 = tele / wide
= 105 / 35
= 3

2) 焦距 = 35 – 105mm
35mm ---> wide (最寬可以zoom到幾寬)
105mm ---> tele (最遠可以zoom到幾遠)