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19 votes

Why is 16:9 aspect ratio rarely used in professional photography?

I expect that this is mostly due to technical limitations. DatAperture wrote it very nicely on Reddit: Lenses project circular images. To get the most resolution out of a lens, you should use a ...
Orbit's user avatar
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15 votes
Accepted

Why is 16:9 aspect ratio rarely used in professional photography?

Adding on to @Orbit's answer regarding area of an inscribed rectangle in a circle, the following graph shows the area of 4:3, 3:2, and 16:9 aspect ratios. Area versus aspect ratio: square: 100% (...
qrk's user avatar
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11 votes

Why is 16:9 aspect ratio rarely used in professional photography?

The 35mm camera evolved into an image size that is 24mm x 36mm. This format was chosen by the German camera maker E. Leitz. One of his engineers, Oskar Barnack designed a 35mm still camera in 1913. At ...
Alan Marcus's user avatar
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6 votes

Does having larger pixel pitch (more microns) makes camera brighter at night?

ISO should mean the amount of light that must be received by the sensor to provide a proper exposure. As such, it is independent of pixel size. The 6 micron pitch sensels will receive 36/16 times ...
Ross Millikan's user avatar
5 votes
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What does 2500 pixels on the long dimension mean?

Exactly. And Lightroom and some image editors will allow you to export an image with a desired value for the "long edge" (rather than for desired width or height). It keeps your resize operations much ...
Lowell Montgomery's user avatar
4 votes
Accepted

How to calculate the size of object in pixels, knowing the camera properties and distance?

If you know the actual width or height and camera-to-object distant, you can easily calculate a ratio size-to-distance. Say a object is 3 meters wide and a picture is taken with the camera positioned ...
Alan Marcus's user avatar
  • 39.3k
4 votes

What are the standard pixel, inches and megabyte sizes for fine art photography?

There is no single standardized file size, ppi, aspect ratio, nor physical dimension in the field of fine art photography. Works can range from square postage stamp sized pieces (or even smaller) to ...
Michael C's user avatar
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3 votes

Why is 16:9 aspect ratio rarely used in professional photography?

One thing that I want to point out is the APS film format (https://en.wikipedia.org/wiki/Advanced_Photo_System) did use a native 16:9 aspect ratio. From what I understand about the system the other ...
The Movie Man's user avatar
3 votes

Why is 16:9 aspect ratio rarely used in professional photography?

Aspect ratio can be anything if you're making your own cameras and coating your own plates. But if you use equipment manufactured by others, you're limited to whatever is actually made and sold. ...
xiota's user avatar
  • 27k
3 votes

Calculating the size of an object from a single image, given the distance from the camera

You can calculate that distance given the formula for the pinhole camera model (which is an approximation, but should work well in the cases of interest). You need to know the focal distance (which by ...
Cal-linux's user avatar
  • 219
3 votes
Accepted

Trying to understand effect of lens lp/mm on image pixels

There are a number of intricacies here which would take hours to get into. Here are a few quick answers: First, define the % contrast at which you are specifying the MTF. The value "145lp/mm"...
Max Henkart's user avatar
3 votes

Trying to understand effect of lens lp/mm on image pixels

Technically, the white lines are your image formed by light; the black lines are a lack of light. And what you need is 290 airy disks/mm; which is airy disks of 3.45um in diameter, which requires a ...
Steven Kersting's user avatar
2 votes

How to calculate the size of object in pixels, knowing the camera properties and distance?

I'm not very sure, but here goes Scaling ...
Z. Abraham's user avatar
2 votes

What happens when pixels cover almost all the area of the sensor?

With conventional CMOS sensors the issue isn't so much the spacing between photosites (pixels). It's all of the circuitry on top of them (usually on the edges of each photosite) that blocks light from ...
Michael C's user avatar
  • 175k
2 votes

What does 2500 pixels on the long dimension mean?

Yup, just make sure neither the width nor the height exceed 2500px for your picture.
Orch's user avatar
  • 231
2 votes
Accepted

Does small sensor/pixel has an upper limit of dynamic range?

Dynamic range is the difference between the minimum and maximum light (photoelectrons) that can be discerned/detected. The minimum is determined by the system's noise floor; there must be enough ...
Steven Kersting's user avatar
2 votes

Does having larger pixel pitch (more microns) makes camera brighter at night?

The lens' aperture diameter (entrance pupil) determines how much light passes through the lens, and the lens' magnification (focal length) determines how spread out that light is; those two factors ...
Steven Kersting's user avatar
2 votes

Does having larger pixel pitch (more microns) makes camera brighter at night?

Sensors with large pixels are one possible way to make a camera usable at higher ISO settings without suffering from too much noise (this is the way eg the Sony A7s series and Nikon D3s/D4 do it). ...
rackandboneman's user avatar
1 vote
Accepted

Determining the size of a pixel at a given distance

If you know the focal length, find out the field of view from https://www.nikonians.org/reviews/fov-tables then it's just trigonometry: pixel size = 2 * tan ( horiz.fov /2 ) * distance / image width ...
FarO's user avatar
  • 1,329
1 vote

Determining the size of a pixel at a given distance

How accurate do you expect/need to be? IMHO between the inaccuracy of the focal length (especially since you are not focused to infinity) and your lens correction, the GIGO principle says that you ...
xenoid's user avatar
  • 21.5k
1 vote

Calculating the size of an object from a single image, given the distance from the camera

The projected size s on your sensor behind a lens of focal length f of an objects of size S ...
xenoid's user avatar
  • 21.5k
1 vote
Accepted

How to count the amount of pixels an object in a photograph takes up

Because you want to see the height and width of a object you can use for example XnView MP. Open the image, press and hold left button of the mouse and mark the object. On the bottom right part of the ...
Romeo Ninov's user avatar
  • 12.2k
1 vote

Does small sensor/pixel has an upper limit of dynamic range?

You can always improve NR algos and on-chip sensors, but for any given resolution, a larger sensor will exhibit less optical noise. Consider setting two containers outside to measure rainfall; one a ...
dandavis's user avatar
  • 412
1 vote

Does photo quality deteriorate when you scale the image size larger?

If you upscale the picture you don't get pixellation (unless you use the "None" interpolation (technically the "nearest neighbor")) you get something blurry. In modern Gimp (2.10) ...
xenoid's user avatar
  • 21.5k
1 vote

Calculating the sensor size or pixel pitch of the Logitech BRIO 4K Webcam?

I have no idea if the 1/4" description is valid for your camera, but in general, the tiny CCD digital sensors are often described by comparing their size to the video vacuum tubes used until about ...
WayneF's user avatar
  • 12.9k
1 vote

Finding required megapixels

This is not a mathematical aproach but an empiric one. Draw an example on a vector based program. Figure 1 is a 24mpx representation of the object and text you describe. Download to see them in real ...
Rafael's user avatar
  • 25k

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