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« on: April 03, 2013, 01:32:14 AM »
I can only recommend this two lenses (and the EF 24-70 2.8 II big grin):
EF-S 17-55 2.8 IS
+ 2.8 at all focal lenght (but I like it only from 3.5 up, at f/2.8 a little bit soft)
+ at f/4 better than the EF 24-70 2.8 II L (at f/2.8, f/11 and up to f/22 the EF 24-70 2.8 II L is better)
+ better build quality than the EF-S 15-85 IS
+ 77 mm filters like most L lenses
+ L-glasses in a non L lens
+ better colors than the EF-S 15-85 IS
+ sharper in the edges and less visible CA´s than the EF-S 15-85 IS
+ full-time mechanical manual focusing after pressing the shutter button half down
+ distance send to E-TTL
= only 7 blades
- hits from the AF only around 85 % (EF-S 15-85 IS is better)
- at f/11 the EF-S 15-85 IS is a little bit and at f/16 the EF-S 15-85 IS is better
- only 3 stop IS
- long and heavy
- build quality can´t reach the L lenses
- not parfocal (I love parfocal lenses)
- like the EF 24-70 2.8 II L not so good if you use the lens at a narrow distance
- some lenses have a dust problem behind the front glass after using it for a while
EF-S 15-85 IS
+ AF better than the EF-S 17-55 2.8 IS (hits around 97 %)
+ 4 stop IS
+ very sharp
+ full-time mechanical manual focusing after pressing the shutter button half down
+ smaller and less weight than the EF-S 17-55 2.8 IS
+ focal range is that what a lot of people want
+ build in tripod function for the IS
= only 7 blades
- focus ring feels cheap compared to the EF-S 17-55 2.8 IS
- not parfocal (I love parfocal lenses)
- like the EF 24-70 2.8 II L not so good if you use the lens at a narrow distance
The EF-S 17-55 2.8 IS is better than the EF 24-105 L, EF 17-40 L and EF 16-35 II L on APS-C. The EF 16-35 II L is a little bit sharper in the middle.
If you don´t need f/2.8 or f/4.0 at all focal lenght, want the best AF hit rate and want save money then get the EF-S 15-85 IS.
If you want the best colors and L quality glasses in a non L lens than get the EF-S 17-55 2.8 IS.
The EF-S 17-55 2.8 IS is the only EF-S lens that you can put with an extension tube EF 12 on a FF camera. But you don´t really want it. You don´t have AF and have a dramatic distorsion.
The EF 24-70 2.8 II L works fine on APS-C if you don´t need the focal lenght under 24 mm. But you have no IS, pay a lot of money and don´t have the right weight balance.