Photography can be a pretty geeky hobby, and sometimes technical questions come down to math.
9
votes
5answers
1k views
Is there a formula to calculate DOF?
I am pretty clear about that DOF depends on:
Focal length
Aperture
Distance from subject
Sensor size
and more (as pointed in the comment).
But what is the question here is: Is there any formula ...
6
votes
1answer
798 views
How can I calculate the change an extension tube makes to the maximum magnification of a lens? [duplicate]
Possible Duplicate:
How can I calculate what the effect of an extension tube will be?
My understanding is that extension tubes increase the magnification of lenses by reducing their minimum ...
3
votes
2answers
274 views
How to calculate object size dependent on distance?
I shot some images for use in a blog post. With the closeups, I ran into the problem of too low depth of field. Because I only need them for the web, I think that the easiest way to solve it would be ...
3
votes
1answer
1k views
How do I find a camera's focal length in pixels?
I am working on camera pose estimation. For this, I need the focal length of my smartphone camera in pixels. (My phone is HTC Wildfire S, with Android 2.3).
2
votes
3answers
403 views
Is there a linear relationship between shutter speed and speed of subject to freeze motion?
Is there a calculation that I can do that will calculate the required shutter speed if I know the speed of my subject and want to get a crisp image e.g. freeze motion?
For example if I go to a car ...
2
votes
2answers
215 views
Why are the area of aperture, focal length, and amount of light specified in these terms?
So I'm looking at the wikipedia article on Aperture, and I'm a bit confused. I understand aperture to be the diameter of the hole that lets light in. In the article, someone states that
The ...
2
votes
2answers
463 views
How to calculate the size of the image circle at infinity focus?
How can I determine the diameter of the image circle (i.e. the diagonal size of CCD required to fully utilise a telescope's optics) at near-infinity focus? I have looked around online and found this ...
1
vote
1answer
175 views
What is the the product of two Fast Fourier Transfoms?
I am reading a book about image processing. I have found mention of a method for processing images.
It is said that a special effect could be reached when we multiply two results of the Fast Fourier ...
