Basic Photography Course

Figure 4-23.Front and rear vertical tilt movement.

The front standard swing allows the lens to pivot

horizontally around its optical axis. The swing front is
used to increase the depth of field. When the swing back
is swung, the film is not parallel with the image
produced by the lens. By swinging the lens, you can
bring the image onto the same plane as the film.

2. Vertical tilt.

Both the front and rear standards

tilt vertically (fig. 4-23).

The tilt back is used to correct distortion, or

perspective, in the vertical plane. When you angle the
camera up to photograph a subject, such as a building,
the vertical lines on the ground glass appear to converge.
When this distortion is not corrected, the subject appears
smaller at the top and the vertical planes bend toward
the center of the image (fig. 4-24, view A). To correct
this distortion, tilt the tilt back so it is parallel to the
vertical plane of the subject (fig. 4-24, view B).

The tilt front is used to focus and increase the depth

of field. When the tilt back is tilted to correct for vertical
distortion, the film plane is no longer parallel to the
image produced by the lens. By tilting the front standard,
you can bring the image of the lens onto the same plane
as the film.

PHAN M. Lakner

302.138

Figure 4-24.Uncorrected and corrected vertical distortion.

4-28

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Basic Photography Course

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DOFMaster for Windows On-line Depth of Field Calculator DOFMaster for Mobile Devices On-line Depth of Field Table Hyperfocal Distance Chart Articles FAQ Recommended Books Support Contact Links Home As an Amazon Associate I earn from qualifying purchases.	contents <- previous page next page -> Figure 4-23.Front and rear vertical tilt movement. The front standard swing allows the lens to pivot horizontally around its optical axis. The swing front is used to increase the depth of field. When the swing back is swung, the film is not parallel with the image produced by the lens. By swinging the lens, you can bring the image onto the same plane as the film. 2. Vertical tilt. Both the front and rear standards tilt vertically (fig. 4-23). The tilt back is used to correct distortion, or perspective, in the vertical plane. When you angle the camera up to photograph a subject, such as a building, the vertical lines on the ground glass appear to converge. When this distortion is not corrected, the subject appears smaller at the top and the vertical planes bend toward the center of the image (fig. 4-24, view A). To correct this distortion, tilt the tilt back so it is parallel to the vertical plane of the subject (fig. 4-24, view B). The tilt front is used to focus and increase the depth of field. When the tilt back is tilted to correct for vertical distortion, the film plane is no longer parallel to the image produced by the lens. By tilting the front standard, you can bring the image of the lens onto the same plane as the film. PHAN M. Lakner 302.138 Figure 4-24.Uncorrected and corrected vertical distortion. 4-28 contents Basic Photography Course <- previous page next page ->	As an Amazon Associate I earn from qualifying purchases.
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