Awesome thanks everyone! I can't believe how you guys are so fast here!
Thank you, it will be for studio and lifestyle types portrait of people. I am looking around and loving the 70-200 and the sigma, The image results are breath taking! my 18-55 kit lens is fine but i find myself having to move in closer to the subjects. I think for most part of it it will be kids and i think not being too close to them hence being able to catch more natural poses would work better.
Thx once again.
Naz
Garnett said:I'm a novice so can't give proper advice but sometimes it's good to hear the basics from someone at a similar juncture...
Conventional wisdom seems to be that you want something a bit long as the shorter a lens the more barrel distortion it will produce whilst filling the frame with the same subject (ie, things in the middle of the shot are made to look larger - this effect is more noticeable on familiar subjects so on faces it is at its most apparent) so people seem to recommend 85mm upto 135mm.
A faster lens like a 2.8 will let you blur the fore- and background and separate them from the subject.
At least, that's my understanding.
Garnett said:Sorry, I think I used the wrong term. Perspective distortion is I think what I meant.
Above 20mm I wouldn't say barrel distortion is an issue.
The lens broke a new record here - at 17mm it shows the most pronounced barrel distortions of all (supposedly) corrected lenses tested to date and that's by quite a margin.
At about 24mm both forces even out technically though there're still some wavy-like distortions left here.
A good lens, especially a prime, no distortion should really be noticeable for a portrait.
You only really notice it on really wide lenses, but as I say 20mm and above it's pretty null and void.
Dave1 said:Except of course for the Canon distortion record holder, the 17-85
http://www.photozone.de/canon-ef-s-17-85mm-f4-56
gad-westy said:perspective plays a part though. Anything below about 50mm is going to be shorter than the human eye sees and can be unflattering on people up close, particularly their noses!
Beyond 50mm, things start to flatten out a little.
A 70-200 would be superb for catching un-posed shots. A lot of wedding photographers use them for exactly that. And for posed shots for that matter. If the budget is there, then it's a great choice but there are a couple of downsides. Firstly they're very big and heavy so not the sort of thing you'd just carry around hoping to catch the odd snap shot. The other downside is that they are quite long for studios (on a crop sensor) if you wanted more than a head shot.
I'm a novice so can't give proper advice but sometimes it's good to hear the basics from someone at a similar juncture...
Conventional wisdom seems to be that you want something a bit long as the shorter a lens the more barrel distortion it will produce whilst filling the frame with the same subject (ie, things in the middle of the shot are made to look larger - this effect is more noticeable on familiar subjects so on faces it is at its most apparent) so people seem to recommend 85mm upto 135mm.
A faster lens like a 2.8 will let you blur the fore- and background and separate them from the subject.
At least, that's my understanding.
Notice I said *good* lens!![]()

50mm on FF maybe but not crop! And interestingly, perspective per se doesn't change between FF and crop, just the field of view.
gad-westy said:I'm trying to follow what you're saying but it reads like you are contradicting yourself. Perspective remains the same regardless of sensor so may statement stands. Perspective is more flattering the longer you go over 50mm.
the 35mm is my favourite portrait lens and it's the one I go for for pretty much all of my portraits.
Yes that's exactly what I said. Perspective remains the same, it's the field of view that changes, yet the 50mm is probably the most used portrait lens of certainly crop body users.
Your previous post states anything below 50mm will bring this perspective distortion in which simply isn't true, which is why, out of my 35mm, 50mm and 85mm, the 35mm is my favourite portrait lens and it's the one I go for for pretty much all of my portraits.
Dave1 said:How do find it for head and shoulder portraits? I wouldn't have thought it would be as flattering as the 85 (or longer).
gad-westy said:Would love to know where I said that. I deliberately didn't use the word distortion at any point as that is not what perspective is. Perspective is merely referring to the the size and distance objects appear in relation to one another. If the end of somebodies nose looks further away from their face than it actually is, that isn't always a good look!
I'll stand by what I actually said which is that focal lengths below approx 50mm exaggerate perspective and above it perspective increases and 'flattens' out the image. Whether you choose to shoot portraits below 50mm doesn't make it wrong, I've done it a lot myself, I just try to avoid closely cropped head shots unless I'm after a particular effect.
I find it more or less perfect for h&s shots, and there's not much difference between 35mm and the 85mm tbh.
Dave1 said:I've always found 35mm unflattering (and not liked by the subject very much).
The sample pic posted further up is 35mm and 85mm, I can see quite a difference (mouth, nose, eyes, forehead).
This one:
Garnett said:From here.
Dave1 said:Jim, looking at the catch lights the lighting is the same, the apparent differences are again down to the fact it's wide angle (so much closer to fill the frame), the poor girl looks like the Mekon with the giant forehead.
Mouth, chin, eyes and nose all appear distorted in the 35mm. I'm really surprised you don't see the difference.
No you didn't use the term distortion, my apologies. I do agree with you though with regards to what are scientific facts (flattening the image with longer focal lengths) I guess my point was that it's not as noticeable as you might think shooting with 'wider' lenses.