artBob wrote:
In the topic "Does perspective change when you change the focal length?" I was not allowed to reply.
Here's what I wanted to write:
"What bigotry and ignorance. I used Andy's own photos (can be seen towards end of "Does perspective change when you change the focal length?", and AGAIN showed that he and others who deny that focal length changes perspective are wrong. Since scientific experimentation and free speech have been shut down here, I am going to post my response to Andy and the original poster who banned me, in my own topic."
I also would like to tell some of the people on that thread the following, in case they follow here:
"Please stop calling people names, for it shows the weakness of your argument.
"Please stop calling people ignorant. In this case, apparent ignorance of linear perspective on the part of some called into question extensive knowledge on my part--I had to teach the damn stuff. Tough. I know many people cannot perceive it, fail at it. However, to accuse of ignorance actually reveals ignorance."
So, here is a transparency of both Andy's photos, with perspective lines indicated. The perspective is indeed changed. I'll also upload his photos, so others can explore.
Also, I found a stock photo shot by a wide angle lens, and drew the perspective lines on it. They are all over the place, thus false. I then corrected for the lens in Photoshop, and indicated the perspective lines we (and generally a 50-70mm lens sees) see.
Finally, CaptainC, whose post started the whole discussion, posted four photos, all shot from the same place, same distance, on a tripod. He had said those who thought lenses distorted perspective were wrong, and that could be proven by cropping the shorter length lens photo and overlaying it on a tele photo. I did that, because I thought, "Wow, really? That goes against what I had thought." So, I looked at two of those photos, lining up the same, most distant building in each so they matched, and found that perspective indeed had changed. Perspective lines for each shot, one set blue, one set red are overlaid.
If anyone wants to join in the discussion, with insight and honesty, please do. Mysteries remain.
In the topic "Does perspective change when yo... (
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Did anyone compensate for the movement of the nodule point of the lense? That will cause a zoom lense to "move" even when the tripod doesn't. The perspective will not change if it is based off the nodule point. The nodule point is also important when one wants a perfect panoramic. If one does not rotate the camera around the specific nodule point of the particular focus length being used of the zoom lens, there will be a shift of very close objects such that they do not and will not superimpose without sofware manipulation. That nodule point changes relative to the tripod mount with every zoom movement of the lense. If these pictures that artBob compared were not done from the nodule point, yes, the perspective did change.
Try a set of slides or images done off the nodule point instead of the tripod mount. The perspective will not change.