Originally posted by Anvh Nope that excuse won't work, he is the conversation.
I can't tell what you are talking about. I made at least a dozen different points in the post you quoted, and then the other posta you cited each contain dozens more points. I can't tell which specific point you are not understanding, or which specific two points you think are in comflict, or what "excuse" you mean. I can only assume you are trying to tell me something about the context of the remarks you previously suggested were in conflict, but I've already explained how they are *not* in conflict and would only appear to be in co flict if you misundertood one of my setences. So I have no idea what you are saying here.
Quote: Anyway basically what it comes down what i'm saying is that the difference between linear perspective of the camera and the viewer is what creates the effect of perspective disorder.
I *think* I understand what you are trying to say, but you are using the terms a but incorrectly if so. The camera has no linear perspecitve, nor does the viewer. Linear perspective is a function of position, as I think we both agree. So what I think - or at least hope - you are trying to say is that the perspective distortion effect is caused by the difference between the linear perspective *that exists within the printed image because of the position it was shot from* and the *linear perspective the viewer of the printed image is mislead into expecting the image to depict*. In which case, that would be a true statement. And the only missing element would then be, answering the question of what *causes* the viewer to be mislead about what linear perspective to expect. And the answer is, the viewer is mislead because the angle of view of the image depicted does not match the angle subtended by the print from the viewing position. This causes the viewer to misjudge the distance to the scene, and this in turn causes him to misinterpet the linear perspective.
Stated simly, it is not the fact that a telephoto picture is taken from a distance that causes a viewer of the resulting image to be mislead about the linear perspective. It is the narrow AOV, resulting in the subject being rendered large in the frame, that fools the viewer into thinking the photographer was closer to the subject than he actually was. The same scene shot from the same distance with a nirmal lens would render the subject smaller, thus giving the viewer the necessary visual cue as to distance from subject that is required to form proper expectations for liner perspective.
Quote: We take as standard that the viewer is standing away a typical distance but if you know that isn't the case and know the distance viewers stand and the print size you can actually calculate what the normal lens will be right?
Yes. My understanding is the IMAX uses this concept. By employing a larger than normal screen for the viewing distance, they create a scenario in which a wide angle lens becomes normal.
Quote: Besides telephoto is about the construction/formula of a long focus lens
True. I am using the term rather more colloquially here: any lens that creates a narrow than normal AOV can be consider telephoto for the purpose of discussions like this, regardless of whether they are truly telephoto in internal construction. If it bothers someone to use the word this way, feel free to substitute another word to mean this.