Comment by foldr
6 hours ago
No. Depth of field is determined by aperture and focal length. Whether or not a lens has a retrofocus design isn’t relevant.
6 hours ago
No. Depth of field is determined by aperture and focal length. Whether or not a lens has a retrofocus design isn’t relevant.
And sensor size. The bigger the sensor the shallower the DOF and better the perceived quality of blur at given f-stop.
It’s only the focal length and f-stop that affect depth of field. Sensor size affects it only indirectly, because you need a different focal length to get the same angle of view.
From an optical point of view, light does not bend differently just because you put a differently-sized rectangle somewhere in its path. Or to put it another way, if you cut the edges off your sensor, that won’t alter the image on the remaining area of the sensor.
Yeah I guess you're right but there are limits on how shallow your DOF can get on smaller sensors. So when it comes to practical irl results you kinda need a larger sensor to get extremely shallow DOF.
1 reply →
Did you read the article?
> Now, here's the kicker: the bigger the focusing lens is, the larger the cone of light rays is, meaning the the out of focus parts of the image will be more out of focus
From the page [0] it takes the depth of focus image from:
> [Depth of focus] differs from depth of field because it describes the distance over which light is focused at the camera's sensor, as opposed to the subject
[0] https://www.cambridgeincolour.com/tutorials/depth-of-field.h...
The first quote is clearly talking about depth of field, not depth of focus. See also what I quoted in my original comment.
Depth of focus isn’t really relevant to the rendering of an image (except insofar as you want your camera to be built to sufficient tolerances that a sharp image can be obtained when desired).
I assumed you were using “depth of focus” to mean “depth of field”. If you really meant “depth of focus”, then I would say you are mistaken in thinking that the author’s goal is to obtain a narrow depth of focus.