[edwardchan]

Excuse me,

What is the difference between "EF 100mm f/2.8 USM Macro" and "EF 100mm f/2.0 USM"?

Can I use EF 100mm f/2.0 USM to take photos for small things?

Must I use "Marco"?

Please give me some ideas. Thanks!

[wtfgary]

EF 100mm f/2.8 USM Macro - ratio is 1:1, and minimum focus distance is shorter than 100mm F2.0.

Of course you can use 100mm F2.0 to take small things but would not be effecteive as the Macro lens.

[edwardchan]

Thanks!

Then what is meant by "1:1"?

I don't know. Please teach me. Thanks.

Also, what are the minimum focus lengths for the two lenses?

[embu31]

1:1 = life size = a bee is 1cm long in life and when you capture it 1:1 on your camera, the bee's image on your film/sensor will also be 1cm long.

[ph_acc]

有唔明呀
你話1 cm long of the bee,係指你係個view finder 度睇ma?
因為你同隻bee遠d,佢會變得好似細左gar ma

同埋我想問,係相同focal lenght 下,你係view finder度睇隻bee應該一樣大gar ma 個size,咁如果係1:1 同唔係1:1會有乜唔同lei

好confuse

[genewch]

A 1:1 magnification means that if the object is 1cm long, then at the closest focusing distance, the image on the 35mm film is also 1cm long. The viewfinder does not provide 1:1 magnification, usually about 0.7x for 35mm cameras. So, if you often take closeup pics, use a macro lens.