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11/01/2005 02:16:30 PM · #1 |
I was just on the Luminous Landscape web site (I'm sure a lot of DPers have been there) and they had a video tutorial about landscape photography. During the tutorial it talked about taking a picture of a very steep canyon not being possible with out a camera or lens with a "rising front." What does that mean? What cameras/lenses have a "rising front?" He said that the vertical canyon cliffs did not look truly vertical without it.
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11/01/2005 02:26:11 PM · #2 |
something to do with large format cameras i think where you can move the lens up and down while the film plane stays verticle or something like that.
Message edited by author 2005-11-01 14:26:53.
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11/01/2005 02:27:26 PM · #3 |
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11/01/2005 02:45:02 PM · #4 |
With a view camera, there are a variety of "movements" possible. It is possible to move the film plane and the lens plane independently. You can shift them side to side or up and down, tilt them about a horizontal axis or swing them about a vertical axis.
There are books about how to use these movements.
Front rise means simply raising the lens up, above the center axis of the film. This creates the illusion that the camera is higher than it really is without distorting perspective.
There are other tricks available to retain perspective as well.
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11/01/2005 02:57:28 PM · #5 |
In order to void the "keystoning" effect, where verticals converge as they rise, the film/sensor plane has to be oriented vertically. Typically this will result in an image that's half foreground, unless you are able to raise your point of view to half the height of the vertical you are covering.
With view cameras the lens and film/sensor plane may be re-oriented with respect to each other. The lens throws an image circle that is much larger than the film/sensor size, and essentially you can position the film.sensot anywhere you wish within that image circle.
To a certain extent this can be duplicated with tilt/shift lenses for Canon, Nikon et al, but the movements are more restricted due to the physical construction of the camera itself.
You can also use a much wider lens than the shot otherwise calls for, set the camera vertically, and crop out unwanted foreground, but this obviously doesn't work if you're up close and need a wide angle in the first place.
Robt.
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