Debating on the EF-S 17-55 f/2.8

[Photog82]

Are you saying that at the wider end of the lens there isn't much background separation at 2.8? Thanks, looking forward to the photos.

[Steph]

Thanks, looking forward to the photos.

There you are... they were between 6 and 10 month old

A close up @ 55mm, f/2.8, 1/80, ISO 2000 -> not bad for the 7D (IMHO), subject distance 37 cm. No flash (it's the bulb in the eyes)


@ 55mm, f/3.2 (? probably P rather than Av), 1/60, ISO 200, subject distance 111 cm with flash bounced on the ceiling


With uncle J @ 42mm, f/2.8, 1/500, ISO 100, subject distance 151 cm


This one, the light is not terrific but that give you an idea of the blur as the window behind is at less than 5 meters from the subject @ 55mm, f/2.8, 1/500, ISO 100, subject distance 135 cm

[Steph]

Are you saying that at the wider end of the lens there isn't much background separation at 2.8?

With your subject at 150 cm and f/2.8
@ 55mm, the DOF behind the subject is +/- 4 cm
@ 17mm, it's +/- 57 cm so, yes, there is less separation.

Play a bit with DOFMaster, you'll see.