[s_coach]

想請問各位:
18-55 + 50-200 和 18-200,如果光圈一樣,哪一方的質素較好?(因為canon剛出了18-200)

[arafeva]

if you are using canon, don't worry about it, canon had hardly made any bad lenses (apart from some of their kit lenses)

I suspect the 18-200mm IS from them is gonna be good.

如果光圈一樣,哪一方的質素較好?<------but which aperture???