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Gallifreyan
Gallifreyan
3:47 PM
^ Thought you people would be interested.
 
 
2 hours later…
Michael Clark
Michael Clark
6:06 PM
@Gallifreyan It and similar such gifs have been posted to death on here before. What they almost always fail to point out is that the changes in shooting distance needed to get the same framing with the different focal lengths is the real difference in perspective. If you use a wider lens from a greater distance and crop to get the same framing you also get the same perspective as using a longer focal length.
 
Gallifreyan
Gallifreyan
@MichaelClark Hah :D Good thing not many people saw it then. I noticed the camera is not fixed - does it make a lot of difference if it is?
 
Michael Clark
Michael Clark
Of course it does. Perspective is strictly due to shooting distance and the ratio between the camera distance to various parts of the subject.
 
Gallifreyan
Gallifreyan
6:28 PM
That's interesting. Sounds like a great topic for a research project in my 2nd year physics classes.
 
Michael Clark
Michael Clark
7:06 PM
25
Q: Is there a difference between taking a far shot on a 50mm lens and a close shot on a 35mm lens?

SwimBikeRunI am looking for a prime lens to pick up, and I'm wondering if there is any difference between 35mm and 50mm in terms of the end product if I just stand back more with the 50mm. I use the Sony a6000 and am looking at the SEL50F18 and SEL35F18. I understand that something like a fish eye lens wil...

lens focal-length perspective subject-distance
10
Q: What is the difference between perspective distortion and barrel or pincushion distortion?

mattdmI've heard of: perspective distortion barrel distortion pincushion distortion mustache distortion What are these different types of distortion, and how do they relate? What causes them, and can they be corrected in the field, or in software post-production? What about "fisheye projection" — ...

lens terminology optics distortion
3
Q: Does wide angle equivalent in crop sensor skew image?

user1938107I see many posts on both this forum and elsewhere the discuss the use of a wide angle on a crop sensor. For example, they discuss how at 14mm lens is 14mm on a 35mm film or full frame, but with a 1.6x crop sensor it is an effective 28mm. My question is, is a 14mm on a crop sensor the same image...

lens optics cropped-sensor crop-factor perspective
4
A: Focal length on Full frames and cropped sensors

Michael ClarkPERSPECTIVE IS ALWAYS ABOUT CAMERA POSITION RELATIVE TO THE SUBJECTS VISIBLE IN THE FIELD OF VIEW. IT IS NEVER ABOUT LENS, SENSOR SIZE, OR ANYTHING ELSE. So far, I understand the first experiment will result in a slight deviation because one is a 75mm lens and another is a 50mm - they are two...

8
Q: Why is the background bigger and blurrier in one of these images?

zakgottliebOn my EM-10 Mk2, I'm testing a Panasonic 25mm f1.8 (top image) against the 20mm f1.7 (bottom image). I tried to make the lamp take up the same space in the frame before focusing, yet the background in the case of the 25mm is much larger and blurrier than the 20mm, which I actually prefer. Sin...

aperture focal-length perspective
2
A: How does focal length change perspective?

Michael ClarkLet's assume you are 10 feet away from your friend Joe and take his picture in portrait orientation with a 50mm lens. Say there is a building 100 feet behind Joe. The building is 10X the distance from the camera as Joe is, so if Joe is 6 feet tall and the building is 60 feet tall they will appear...

37
Q: What does it really mean that telephoto lenses "flatten" scenes?

cbazThis is another perspective distortion question. I understand that perspective distortion is primarily a function of capture and viewing distance, but I am still working on fully understanding the causes of the "flattening" of scenes that is credited to telephoto lenses. This seems to refer to o...

focal-length telephoto perspective subject-distance
 
Gallifreyan
Gallifreyan
@MichaelClark Aargh! Too many posts! :D Thanks, I'll look at those ;)
 
Michael Clark
Michael Clark
7:33 PM
One more link that illustrates same distance equals same perspective, even when shot with different focal lengths. It is linked in one of the answers to the above question, "What is the difference between perspective distortion..." australianlight.com.au/blog/post/…
 

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