Linked Questions

1
vote
3answers
128 views

relationship between focal length, perspective projection and camera distance

This page here describes that the focal length does not result in perspective distortion, while this page here describes if you increase the focal length and camera distance to infinity then it ...
9
votes
5answers
1k views

Would a 50mm lens on a Canon APS-C crop produce the exact same image as an 80mm lens on a full frame camera?

Scenario: I put a 80mm lens on a FF camera and take a picture I put a 50mm lens on a Canon APS-C crop camera (1.6x crop) and take a picture Going by the 1.6x crop, I understand the fields of view of ...
2
votes
4answers
759 views

How can I take undistorted overhead top view pictures of a stationary gas compressor?

I need to take overhead top view pictures of a stationary gas compressor. How can I get the image to appear flat by adjusting the focal length? Example: I need to know what type of lense or camera to ...
3
votes
5answers
3k views

How is focal length facial distortion different on an APS-C sensor compared to a full frame? [duplicate]

From my understanding (and research) focal length affects how a face will end up looking on a photograph. Here's an example of focal length distortion on a full-frame sensor: My question is: will a ...
6
votes
6answers
2k views

How does crop factor affect perspective?

I have a question about crop factor and how it affects the perspective. Suppose you have one Super 35 camera and one APS-C camera. As far as I understand, to photograph the same image on the APS-C ...
5
votes
2answers
2k views

Do I need a telephoto lens to make objects in the distance appear closer? [duplicate]

I have seen some photos where a far-away object looks much bigger compared to nearby objects. Apparently this is called lens compression and it has to do with the focal length of a lens. How can I ...
0
votes
2answers
148 views

Focal length : 7.8 mm-46.8 mm (Equivalent to 35 mm-210 mm on a 35 mm camera) [duplicate]

Bridge Camera : Fujifilm S7000 Could anyone help me to understand the below, Focal length : 7.8 mm-46.8 mm (Equivalent to 35 mm-210 mm on a 35 mm camera) I'm referring to DSLR based articles to ...
1
vote
2answers
149 views

Recreate aerial photograph: find correct position

My father has an old aerial photograph of the neighbourhood where he lives (and where I grew up), while it was still under construction, taken around 1975. It's not digital of course, but I ...
2
votes
4answers
1k views

When do straight lines become curved when talking about projection?

This in not a question directly pertaining to photography, but the theory of projection in general. Imagine that I'm drawing my surroundings, say, in a city with straight lines everywhere. I start ...
0
votes
1answer
3k views

Best lens for landscape photography on a crop-sensor body (APS-C) [duplicate]

Recently I've been studying Elia Locardi's work and I've noticed he shoots on a Nikon D810 (full frame) with a 14-24mm lens. Even though 14mm is really wide especially on a full frame body, it doesn't ...
1
vote
1answer
342 views

Understanding Lens Viewing Angle and Focal Length Relationship [duplicate]

I have a camera module with a lens viewing angle of 185° and a focal length of 1.8. But as far as I can tell, this camera module is not classified as a fish-eye lens. The working distance is ...
0
votes
3answers
108 views

Zoom or Approaching [duplicate]

I know that capturing a near object and capturing the same object with going apart with zoom makes a lot of sense But I'm confused what change does it do to the picture?? Could anyone help me in this?...
1
vote
6answers
648 views

Lens equivalent depth of field [duplicate]

This question is ported directly from Physics SE, because the guys there believe this is the right place for it. In digital photography, there's the principle of lens equivalency, according to which, ...
-4
votes
2answers
24k views

Why does my forehead look big in pictures vs. reality? [closed]

My forehead in reality is small—normal. Everyone I ask tells me it is normal, not big. In photos it seems too big—not even normal. I am a man. My hairstyle doesn't hide the forehead, it is up. Why in ...
17
votes
4answers
5k views

What is the difference between perspective distortion and barrel or pincushion distortion?

I'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 ...

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