Questions tagged [camera]
A device used to record static or moving images, either digitally or on a physical medium. The images captured may be in any region of the electromagnetic spectrum such as x-ray, infrared, visible, or ultraviolet and beyond.
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Photo at $1/c$ seconds [duplicate]
If I were to take a camera that could shoot at a frame rate of $1/c$ seconds, could I take a picture of light at a single point in space? If I could, what might it look like?
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Resolution of Virtual Image on Camera Lens: Total Path Length versus Angular Extent (relative coverage of lens's field of view) of Reflected Light
For an upcoming DIY project, I have some constraints that can be reduced to the following diagram:
In words, there is an object ($\color{green}{\text{green}}$ rectangle) with a specific feature (...
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Is this additive mixing or camera image sensor error?
I have coupled RGB laser light into 3 gratings on chip and projected the light into the the farfield and put a camera sensor on top of the beam. Here is the setup and the experiment.
What I observed ...
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Thermographic Analysis Best Practices
I have recently been assigned to conduct thermographic analysis on composite materials, and as I am new to this field, I would appreciate guidance on experimental best practices.
My current setup ...
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Why don't objects 'invert' when viewed through a very small aperture? [duplicate]
We have seen in textbooks that, in a pinhole camera, light rays intersect at the aperture and then 'invert' inside the camera. But when I tried to replicate this by viewing objects through tiny holes ...
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Why doesn't a pinhole camera work with a large hole?
All the explanations in the internet about pinhole cameras show two rays from outside passing through a small hole and produce an inverted image inside. Why doesn't it work with a big hole? Or ...
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How exactly does a camera measure the electromagnetic field?
I know that a camera does not directly measure the immediate value of the electromagnetic field's vector, but rather the average value of a derived quantity (a statistic of the EM field). Perhaps this ...
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I am making a room sized camera obscura but I want to capture a specific view not directly in front of the windows. Is there a way to do this? [closed]
To explain a bit further. I am trying to capture the train coming which you can only see if you turn a bit to the left looking at an oblique angle. I am wondering if there is a way to calculate where ...
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How could I manually find the field of view of a camera lens at specific focal lengths?
I'm trying to manually find the fov of my FE 24-70mm F4 ZA OSS Sony full frame lens. I know I can find it on the internet, but I want to do a physics/mathematical investigation myself.
I have an idea ...
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Why are the northern lights so much less visible to the naked eye than to smartphone cameras?
The northern lights have been visible where I live recently, but I've found them to be practically impossible to see with the naked eye. Phone cameras, however, show them quite brilliantly. How is ...
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Matching $f$-number to FOV
I often read that the $f$-number of an optical system (here a camera and a lens) should be matched to the FOV, but doesn't know exactly what it means.
The FOV is determined by the focal length $f$ and ...
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Clarifying Magnification Values in Photography
Question:
What is the range of magnification produced by a camera lens?
Given the options:
(a) more than $-1$
(b) more than $+1$
(c) less than $-1$
(d) less than $+1$
Context:
I’m trying to ...
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Why do images invert to create a perfect image (ie a pinhole camera)
This image has always confused me, and it seems to be the go to example when explaining why images are inverted when looking through a pinhole camera.
I understand that light travels in a straight ...
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Why is a bigger camera sensor better at low light than a smaller one?
People say a bigger camera sensor is better for light performance as the photo sensors are bigger and hence let in more light. But couldn't you just let the same light in and focus it down onto the ...
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Reflect visible light transmit infrared light
I have a color camera and PIR sensor inside a commercial security camera which records when motion is detected.
I want to hide the security camera behind a 1/2 inch polycarbonate window which reflects ...
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