Originally posted by: rml
Canon EF 50mm f/1.8 II Camera Lens is like $80 but the 85mm f/1.8 USM is over $200.
Is the $80 lens really beat the sharpness of the $200 lens?
Originally posted by: ElFenix
iirc it's slightly sharper than the 85L at the same apertures.
Originally posted by: foghorn67
All you guys are missing something. 50mm on a crop body is like an 85mm on FF only in focal length only.
It won't give you the subtle flattening effect of a telephoto.
Originally posted by: soydios
Originally posted by: foghorn67
All you guys are missing something. 50mm on a crop body is like an 85mm on FF only in focal length only.
It won't give you the subtle flattening effect of a telephoto.
It's the same angle of view, so yes, it actually will.
The depth of field is still calculated from the actual focal length, however. So a 50mm lens at f/1.8 on a 1.5x/1.6x crop body will have the same angle of view as an 80mm lens and the depth of field of an 80mm lens set at f/2.8.
Originally posted by: foghorn67
Originally posted by: soydios
Originally posted by: foghorn67
All you guys are missing something. 50mm on a crop body is like an 85mm on FF only in focal length only.
It won't give you the subtle flattening effect of a telephoto.
It's the same angle of view, so yes, it actually will.
The depth of field is still calculated from the actual focal length, however. So a 50mm lens at f/1.8 on a 1.5x/1.6x crop body will have the same angle of view as an 80mm lens and the depth of field of an 80mm lens set at f/2.8.
what? care to revise your statement? Not talking about angle of view.
For an extreme example. Try using a 28 or 30mm lens for a 50mm replacement on a crop body. Notice that you still have the same perspective distortion as you would using one of those lenses on a FF.
-edit-this is called "perspective compression". It's the reason portraits have more than one portrait lens, even in the studio. They can see fit on how much they want to flatten out things that stand out, like noses.
Originally posted by: soydios
Originally posted by: foghorn67
Originally posted by: soydios
Originally posted by: foghorn67
All you guys are missing something. 50mm on a crop body is like an 85mm on FF only in focal length only.
It won't give you the subtle flattening effect of a telephoto.
It's the same angle of view, so yes, it actually will.
The depth of field is still calculated from the actual focal length, however. So a 50mm lens at f/1.8 on a 1.5x/1.6x crop body will have the same angle of view as an 80mm lens and the depth of field of an 80mm lens set at f/2.8.
what? care to revise your statement? Not talking about angle of view.
For an extreme example. Try using a 28 or 30mm lens for a 50mm replacement on a crop body. Notice that you still have the same perspective distortion as you would using one of those lenses on a FF.
-edit-this is called "perspective compression". It's the reason portraits have more than one portrait lens, even in the studio. They can see fit on how much they want to flatten out things that stand out, like noses.
Unfortunately I don't have a full-frame camera on which to demonstrate this. Can anybody test this?
I hate to cite Ken Rockwell, but it's the best comparison I could find: http://www.kenrockwell.com/tec...ll-frame-advantage.htm
Note that in the first and second roll-over example images, where the focal length is adjusted between sensor sizes to keep the same angle of view, that the perspective (ratio of sizes of objects at different distances) doesn't change when the angle of view is kept constant.
But in short, it's the angle of view that matters.
Originally posted by: angry hampster
Non-distortion perspective? What is that supposed to mean?
Originally posted by: foghorn67
Originally posted by: soydios
Originally posted by: foghorn67
Originally posted by: soydios
Originally posted by: foghorn67
All you guys are missing something. 50mm on a crop body is like an 85mm on FF only in focal length only.
It won't give you the subtle flattening effect of a telephoto.
It's the same angle of view, so yes, it actually will.
The depth of field is still calculated from the actual focal length, however. So a 50mm lens at f/1.8 on a 1.5x/1.6x crop body will have the same angle of view as an 80mm lens and the depth of field of an 80mm lens set at f/2.8.
what? care to revise your statement? Not talking about angle of view.
For an extreme example. Try using a 28 or 30mm lens for a 50mm replacement on a crop body. Notice that you still have the same perspective distortion as you would using one of those lenses on a FF.
-edit-this is called "perspective compression". It's the reason portraits have more than one portrait lens, even in the studio. They can see fit on how much they want to flatten out things that stand out, like noses.
Unfortunately I don't have a full-frame camera on which to demonstrate this. Can anybody test this?
I hate to cite Ken Rockwell, but it's the best comparison I could find: http://www.kenrockwell.com/tec...ll-frame-advantage.htm
Note that in the first and second roll-over example images, where the focal length is adjusted between sensor sizes to keep the same angle of view, that the perspective (ratio of sizes of objects at different distances) doesn't change when the angle of view is kept constant.
But in short, it's the angle of view that matters.
You don't need a FF to test this. Slap a 30 or a 28mm on your crop and notice the distortion. Now imagine the opposite if going north of 50mm. 50mm is the closest to a normal non-distortion perspective. So 35 extra mm gives you weeeee bit more compression. It's subtle, but it's there.
Originally posted by: foghorn67
Originally posted by: angry hampster
Non-distortion perspective? What is that supposed to mean?
fck, aren't you in college?
Okay, I have been up since 330 AM. how about non-distorted?
Originally posted by: angry hampster
I have never experienced distortion with a 28 or 35mm lens on either a full frame camera or a crop aside from slight barrel or pincushion with cheap lenses. What the hell are you guys talking about? Are you takling about distortion of facial features with a wide lens? It has to do with subject distance, not focal length. People can look perfectly normal when shot with a fisheye lens as long as they're centered in the frame and more than a few feet away.
Originally posted by: foghorn67
ugh, just do a comparison of your own.
Originally posted by: angry hampster
Originally posted by: foghorn67
ugh, just do a comparison of your own.
? A subject placed equidistant from a camera with a 70mm lens will not be any more distorted than with a 28mm lens, assuming both share quality glass.