ray3788

Quote:

Original posted by puppymic at 22/09/2009 22:25
請問如果我用 Swarovski STS-80HD + 30x eyepiece + GH1 zoom len 18 - 25mm，即是等於多長的距離呀？

好簡單, 假如你 zoom 盡 25mm, 咁個實際焦距就 = 25mm x 30(倍) = 750mm

而 gh1 o既 crop factor 係 2x, 即係 135相機o既等效焦距係 750mm x 2 = 1500mm