Useless lenses you fell in love with
- Canon Lenses
- 37 Replies
dak723 said:privatebydesign said:Ian_of_glos said:But we all know what he means don't we? It is academic whether it is the lens that is creating the compression effect or the distance you are from the subject when you take the picture. The point is that the image will look more compressed if a long telephoto lens is used rather than a lens with a shorter focal length.privatebydesign said:Lenses don't 'give you compression'.
No I don't think we do know what he means. How does a 100 not "give you the compression of the... ...70-200s"?
aceflibble said:Second, Canon's 100mm f/2. It doesn't give you the compression of the 135mm or any of the 70-200s.
That makes even less sense! Any 100mm lens, or zoom spanning 100mm will give you exact;y the same perspective. It won't 'compress' anything, but it will give you a perspective.
The problem with these oft repeated inaccuracies is they confuse people with less understanding or education. My calling for accuracy in terminology is not me being pedantic, it is an effort to prevent confusion in others.
Lenses do not create 'compression', use an 18-200mm zoom and stand in the same place and take a shot at both ends of the zoom range then crop the 18mm image to the same framing as the 200mm image and the 'compression' is the same. Because I was taught perspective rather than compression that is an obvious fact to me, people taught about lens compression often struggle to get their heads around the concept of perspective because of that falsehood.
Am I wrong to point that out?
Yes, because the terminology you were taught is far more confusing and probably incorrect. The perspective changes between the viewer and the subject when the viewer moves left, right, up or down. Compression implies that the viewer seems closer to the subject, which is what zooming - or cropping - does.
Pretty simple to understand. You seem to be confusing the terms perspective and field of view. Narrowing the field of view does nothing to change the perspective, it changes the apparent distance between camera and subject, in other words, the compression.
No.
Perspective is the spatial relationship between you and all the things in the image. Compression is a bullsh!t term that implies a longer lens will give you a different perspective from the same place than a shorter one, which is not true.
See the red highlighted line above, acefibble is not using the term as you understand it, he is directly stating compression is a function of focal length and can not be replicated, that is not what you or I am saying, we are saying 'compression' is perspective and is the same regardless of focal length, it changes when you move, not when you change lens.
For illustrative examples look at this post, http://www.canonrumors.com/forum/index.php?topic=19483.msg366490#msg366490
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