chobit

I also have the I have the 17-40, 24-70 and 24-105.  I can do some test shots if you can wait a little.  However, I think they all have enough distortion that you would probably want to avoid having people's faces on the edges anyway.  ideally, I would not go under 35mm for group shots.., but I understand that this is not always avoidable.

EL

shutterbug

All zooms @ 24mm will have quite a bit of distortion...it just seems "normal"...so avoid people near the edge.

The good news: Photoshop can correct the distortion to some degree.

Get a prime if you don't want too much distortion.

Catpiano

Yeah .. even prime .. will hv SOME distortion ...    no big deal ..

chobit

Yeah..., we just have to work with it's limitation, and take advantage of what it offers, and avoid what you don't like seeing on your pictures..

EL

SmellyTofu

Thanks EL for that...  even though it's unavoidable, sometimes there's no choice.... but out of the 24-70 and 24-105, which one distorts the most?

shutterbug

no need to test yourself la...there are reviews out there already

check this one out

http://www.luminous-landscape.com/reviews/lenses/28-105.shtml

"Distortion

I live on Georgian Bay, part of Lake Huron, and have a flat horizon to the north-east. I shot the sky with the horizon (the lake) close to the bottom of the picture.

Both lenses show significant barrel distortion at 24 mm, but the 24-70 mm lens is not as pronounced. At 35 mm there is only a little distortion from either lens, but by 50 mm focal length, both show pincushion distortion – again the 24-70 mm is the lesser offender. At 70 mm there is still pincushion distortion though it’s very slight in the case of the 24-70 mm lens.

The 24-70 mm lens is the distortion winner."

echo

如果 17-40, 24-70, 24-105 三支鏡比, 我會話 17-40 既 24 mm 係最少 barrel distortion.