Professional guides to perspective control tilt and shift lenses
Professional guides to perspective control tilt and shift lenses | ||
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These lenses were designed originally for architectural photography, to enable photographers to achieve control of perspective. The lens can be tilted in either a vertical or horizontal plane relative to the camera, or shifted up and down or sideways. These movements are similar to those found in large format sheet film cameras used by studio and architectural photographers for increasing depth of field or correcting perspective distortions. The tilt movement can be used to increase depth of field within an image without stopping down the lens. The theory is based on the Scheimpflug Principle, which states that an image will have optimum sharpness when a plane through the lens panel, image sensor, and subject intersect at a common point. Today, several models are available with macro capabilities, including the Nikon PC-E Nikkor 85 mm and the Canon TS-E90 mm. The amount of tilt and shift is rather limited, to prevent vignetting of the image, so it may not be possible to bring all of a subject into sharp focus using swing and tilt movements alone—you may still need to stop down the aperture as well. | ||