[Wade]

請問Canon 28mm-70mm L f/2 系唔系定左產ka? 因為我只見過Canon 24mm-70mm L f/2.
其實兩支鏡除左焦距分別外,重有麥分別?
28-70 好像平d???

thank you!!!

[mcben]

Both 28-70 L and 24-70mm L have largest apperture of 2.8. However, the 28-70 has been discontinued and thus the you can only buy the new one of 24-70mm L in the market. Alternatively, there may be some 2nd hand 28-70mm selling in the 2nd hand market too.

[nlsho]

24~70's sealing is better.
When used on 1.3x model, it covers the most common focal lengths 32~90, and the 28~70 becomes 36~90, which seems to be similar but critical for some.
When used on 1.6x model, the difference will be 38~112 (a general utility lens) vs 45~112 (a portrait lens). Again, seems to be similar but critical for some.
I now use the 50 instead of 28~70 on 1.6x body, thus the zoom sold.
Someday, when I can afford a 1.3x body, I will buy the 28~70 again, as the difference in optical performance, lens construction and focal length are not worth the price difference for me.