[sobilly28]

部機寫實際焦距 9-36
但其他介紹寫135 equiv. 35-140
都唔知信邊個？thanks !

[平凡的地夫]

9-36 O個個係部機本身個焦距,
135 ERQUIV o個個就即係話,
相對於135mm 菲林機o既焦距
因為出便人人影相時大多數都係都係以135mm 菲林機o既
焦距為標準~

[peterchan04]

因為dc 機 個感光元件 細過135菲林尺碼 (ccd/cmos 36x24mm)
所以枝鏡 焦距要 x crop factor

canon power shot a620
ccd 1/1.8" (7.18mm x 5.32mm)
鏡 7.3-29.2mm = 35-140mm (135機計算)

[beancurdbean]

The crop factor is x4 because the size of sensor is much smaller than the 135 Full frame sensor