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rweakins

macrumors 6502
Original poster
May 3, 2007
312
0
i have a canon rebel xt, EF 70-200mm F2.8L USM and 18-55mm f3.5-5.6. i was wondering what lenses are best for portraits mostly.
 

thr33face

macrumors 6502
May 28, 2006
381
0
It absolutely depends on what kind of portraits you are shooting and on a million of other factors.
There is no "best for ..." in photography (i'd say)

but that 70-200/2.8 will do just fine.
 

harcosparky

macrumors 68020
Jan 14, 2008
2,055
2
Use the 70-200mm in the 100mm range.

I used to use a Canon 100mm Macro lens for portrait work and it worked out real well.
 

stagi

macrumors 65816
Feb 18, 2006
1,125
0
the 85 1.2 (or 1.8) and 50 1.2 (or 1.4) are beautiful lenses.
 

rweakins

macrumors 6502
Original poster
May 3, 2007
312
0
just curious if anyone is willing to post shots they have taken with that lens
 

harcosparky

macrumors 68020
Jan 14, 2008
2,055
2
OP:

I did a little search and came upon this thread. It has to do with .....

" What makes one lens better than another for a particular application. "

Oddly that is a Digital Video Forum but the topic is clearly on lens usage.

One poster even mentions that he tool some portraits with his 85mm prime lens and than with a zoom set on 85mm, he said the prime clearly did a better job.

Here is the URL ......

http://www.dvinfo.net/conf/showthread.php?t=15441

Note: I prefer the 85-100mm length because it allows me to stand back a bit and no be so " in your face " with a subject.
 

MacUserSince87

macrumors member
Aug 18, 2007
74
0
Northern Virginia, USA
Shooting Distance is what matters...

Distance to the subject, not focal length, is what controls perspective, such as how big the nose looks relative to the ears. Get too close with any lens and the face will look wider and the nearer nose, arms, feet, etc. will appear larger than normal. Keeping all the body parts a similar distance from the lens also reduces near/far size differences.

Normal looking perspective in a portrait, similar to that perceived by eye, requires shooting from a distance of 7-8 feet. From that ideal distance various focal lengths will produce different in-camera crops. With the 1.6 crop factor of your camera the Canon 85mm f/1.8 is ideal for a tight head and shoulders shot. A 50mm F/1.4 used from the same distance will produce the same flattering perpective but with a looser head and shoulders crop. Both of these lenses are an excellent value in terms of speed, image quality and weight vs cost. If you want to spend a bit more and have the flexiblity of a wider focal length and zoom the 24-105mm f/4 IS would be a good choice.

Backing up to about 15 to 20 feet and zooming to crop can result in very flattering perspective so when doing outdoor portraits where space isn't a problem the 70-200mm range is ideal for head shots.
 

PeteB

macrumors 6502a
Jan 14, 2008
523
0
35L, 50L, 85L, and the 135L

If money wasn't the issue, I'd agree. But based on the OP having an XT, I'd guess that he needs a more value-based alternative.

The 50mm f/1.8 would be a good bet, as will the 70-200

The 50mm isn't noted for wonderful bokeh, so you'd need to be careful about backgrounds to get a good effect.
 

Shaduu

macrumors 6502a
Jan 31, 2007
750
0
Southsea
I use the 50mm f/1.8 almost exclusively for my portraiture.

Here's some images:

Through_The_Eyes_Of_A_Child_by_eveofthorn.jpg


Tea__Coffee_or_Me__by_eveofthorn.jpg


img2092hx4.jpg
 

OreoCookie

macrumors 68030
Apr 14, 2001
2,727
90
Sendai, Japan
Distance to the subject, not focal length, is what controls perspective, such as how big the nose looks relative to the ears. Get too close with any lens and the face will look wider and the nearer nose, arms, feet, etc. will appear larger than normal. Keeping all the body parts a similar distance from the lens also reduces near/far size differences.
The focal length has a profound influence on perspective, ever try to make a portrait with a wide-angle? (Well, unless you are doing it for the effect on purpose.)

@OP
I'd suggest you get a 50 mm lens in addition to your 70-200 zoom. The 70 mm correspond to about 110 mm on film which is already a bit much for portraits for my taste. The 50 mm would complement your 70-200 zoom quite nicely and it's cheap (rather: it has very good value like all 50 mm lenses). It's effective focal length is about 80 mm on your crop sensor XTi, so you'd cover everything in between 80 and 300 mm. Usual focal lengths for portraits are about 70 to 135 mm (on film).

The other fixed focal length lenses (85 and 135 mm) overlap with the focal length range of your zoom -- which doesn't make much sense in my opinion.
 

Mechcozmo

macrumors 603
Jul 17, 2004
5,215
2
I use a 50mm f/1.4 on my Pentax K10D, which gives me a 35mm equivalent of 75mm.

Anything 50-80 will be good on a digital body like yours; the 70-200L is beautiful, but alas, expensive. It's useful for more things, though, and when you upgrade to a 5D or a 1D or something of the sort it'll serve you well.

If you'd like to see sample pictures taken with a 50mm lens on a digital body, check out my Flickr profile... http://www.flickr.com/photos/mechcozmo

Hell, I'm the kind of person who'd say you need a 50mm prime in your kit regardless of other gear. Such useful lenses.
 

pprior

macrumors 65816
Aug 1, 2007
1,448
9
Oreo....

Focal length has an effect because it changes where you stand to take the picture.

Take a picture at 28mm.

Take another picture at 70mm or higher STANDING IN THE SAME POSITION

Crop to make them the same size with a frame.

Tell me if you note a difference with these two very different focal lengths.

Important concept to learn. The practical reality given we tend to fill the frame with the subject is that we stand closer with a WA lens and thus create relative near/far field distortion. However this is not an effect of focal length directly, but rather of distance to subject, as is correctly pointed out above.

As to the OP, since he sunk money into the 70-200/2.8L I wouldn't make the assumption he's only interested in cheap. The 50/1.4 would be OK, the 85/1.8 a good value choice, and the 85/1.2L a knockout lens for portraits. The 135F2 is also a very nice lens with wonderful bokeh but for full body with a crop camera, you'll need lots of room.
 

Edge100

macrumors 68000
May 14, 2002
1,562
13
Where am I???
The other fixed focal length lenses (85 and 135 mm) overlap with the focal length range of your zoom -- which doesn't make much sense in my opinion.

Makes sense to me, especially if we're talking the 85/1.2L which is absolutely incredible for portraits (though might be a tad long on a 1.6x such as the XT). The best bokeh I've ever seen has been from a 85/1.2L

As for the 50s, the 50/1.4 is a noticeable step up from the 50/1.8 (in IQ, bokeh, and esp. in build quality); while the 1.8 has the edge on price, the 1.4 is not what I'd call an expensive lens. Skip the 1.8 and go for the 1.4, if you're going the 50mm route (which is the ideal portrait length on a 1.6x).
 

OreoCookie

macrumors 68030
Apr 14, 2001
2,727
90
Sendai, Japan
Oreo....

Focal length has an effect because it changes where you stand to take the picture.

Take a picture at 28mm.

Take another picture at 70mm or higher STANDING IN THE SAME POSITION
Which means you crop both pictures so that they cover the same viewing angle. If you shoot portraits with a wide-angle lens, you will have to throw away most of the pixels. But it's not just about pixels, how do you even compose a shot with a lens that has more than twice the viewing angle? Sorry, but this is not how photography works in the real world.

So yes, perspective is determined by viewing angle, but viewing angle is determined by focal length and sensor size (so for a fixed sensor, it's determined by focal length). Focal length (not viewing angle) also determines the depth of field you may achieve at any fixed aperture.
 

OreoCookie

macrumors 68030
Apr 14, 2001
2,727
90
Sendai, Japan
Makes sense to me, especially if we're talking the 85/1.2L which is absolutely incredible for portraits (though might be a tad long on a 1.6x such as the XT). The best bokeh I've ever seen has been from a 85/1.2L
Also because the 1.2/85 lens costs an arm, a leg and your first born …*;) :D
Plus it's heavy. (Not as much of an issue, I guess, it should weigh about the same as the 2.8/70-200 zoom.)

Even if he buys the 50 mm and decides he doesn't like it, he has wasted very little money on it.
 

MacUserSince87

macrumors member
Aug 18, 2007
74
0
Northern Virginia, USA
The focal length has a profound influence on perspective, ever try to make a portrait with a wide-angle? (Well, unless you are doing it for the effect on purpose.)
What causes the near/far distortion is not the shorter focal but the fact you would need to move closer to the subject to get the same in-camera crop. Also don't confuse near/far size perspective with the anastigmatic distortion evident at the edges of extreme WA.

Just take a 50mm lens and shoot the same subject from 2, 4, 6, 8, and 10 ft. Then take the five photos and crop in Photoshop so the head is the same size. You will see how distance affects facial perspective.
 

OreoCookie

macrumors 68030
Apr 14, 2001
2,727
90
Sendai, Japan
What causes the near/far distortion is not the shorter focal but the fact you would need to move closer to the subject to get the same in-camera crop. Also don't confuse near/far size perspective with the anastigmatic distortion evident at the edges of extreme WA.

Just take a 50mm lens and shoot the same subject from 2, 4, 6, 8, and 10 ft. Then take the five photos and crop in Photoshop so the head is the same size. You will see how distance affects facial perspective.
You still don't really read what I've written, you simply cannot take pictures the way you describe:
(i) You want to cover most of your subject without any cropping.
(ii) You want to have a certain look (larger focal lengths tend to make things flatter, because you can take the picture from farther away).
(iii) You want a certain depth of field.

Portraits cover the face and perhaps parts of the upper torso. Of course you need to get closer if your lens has a larger viewing angle to compose your shot properly. For typical portrait situations, i. e. a typical distance (not too close, not too far, you mustn't get into the comfort zone of people, especially those you don't know so well), a typical depth of field you'd like (depends on the shot, but longer focal lengths give you more creative freedom) and perspective. These requirements exclude wide angle lenses.

Note that I'm not lecturing about theory here, your argument that the distance to the subject determines perspective is correct.
But people don't buy lenses that have a given depth of field at a given aperture either (= determined by focal length), they buy lenses with the viewing angle they want.
 

Edge100

macrumors 68000
May 14, 2002
1,562
13
Where am I???
Also because the 1.2/85 lens costs an arm, a leg and your first born …*;) :D
Plus it's heavy. (Not as much of an issue, I guess, it should weigh about the same as the 2.8/70-200 zoom.)

Even if he buys the 50 mm and decides he doesn't like it, he has wasted very little money on it.

Oh, I agree. The 85/1.2 is not on everyone's list because of its massive price tag. My comment was merely that overlap of focal lengths is not necessarily a good reason not to buy a particular lens.

If I were doing portraits on a 1.6x crop, I'd get the 50/1.4 in heartbeat. If I made money at it, I'd sell the 1.6x crop, buy a 5D and the 85/1.2L and be in portrait heaven.
 
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