3D - Indirect effect of focal length
May 3, 2019 09:54:52 #
You will need a pair of red/cyan anaglyph glasses to view an anaglyph images. It can be downloaded and viewed at any size. The cross eyed version should be viewed on a smartphone or similar small display. If you make the images larger you will need to back away from the display.
These were captured with an iPhone at 12 MP and 28mm equivalent focal length.
For the closeup image it was necessary to reduce the separation between the camera's position (interocular distance) to about an inch to prevent left and right eye image for the nearby subject (less than two feet from the camera) from being distorted. With the main subject nearby it is also possible (or necessary) to allow it to emerge from the display.
The landscape did not have any objects that close to the lens so the separation was closer to normal - about 2½ inches. Stuff that's too close to the camera can still hover above the display but it can be difficult to see.
These were captured with an iPhone at 12 MP and 28mm equivalent focal length.
For the closeup image it was necessary to reduce the separation between the camera's position (interocular distance) to about an inch to prevent left and right eye image for the nearby subject (less than two feet from the camera) from being distorted. With the main subject nearby it is also possible (or necessary) to allow it to emerge from the display.
The landscape did not have any objects that close to the lens so the separation was closer to normal - about 2½ inches. Stuff that's too close to the camera can still hover above the display but it can be difficult to see.
May 3, 2019 10:18:11 #
Contrast the landscape image above to this one taken with a Nikon Df and a 150mm focal length. With the telephoto lens there are no nearby elements. The separation between shots was about 20 inches. The distance between the reeds on the shoreline and the trees in the background was about the same as the distance from the camera to the reeds.
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