[timhbf]

請問以鏡頭用在400D的實際焦距是多少?

1) Tamron SP AF 17-50 F/2.8
2) Canon Kit len
3) Canon EF 17-40mm f/4.0L USM
4) Canon EF-S 17-85mm f4-5.6 IS USM

Thanks!

[A.T.]

1) Tamron SP AF 17-50 F/2.8
↑27.2 mm- 80mm

2) Canon Kit len (18-55)
↑28.8mm - 88mm

3) Canon EF 17-40mm f/4.0L USM
↑27.2mm - 64mm

4) Canon EF-S 17-85mm f4-5.6 IS USM
↑27.2mm - 136mm

[timhbf]

Thank you!

Which one is the best to supersede the kit len regardless the price?

[timhbf]

BTW, I awared that Canon 17-40 is considered as Marco len but others doesn't. What are the differences between marco and non-marco? Focus length less than 40 considered marco?

[Philippe]

普通鏡到咁上下埋會對唔到焦,Macro鏡就可以好近都對到焦,所以放大率會比較大.

[man1492]

I suppose 1) is the best among the all.