“Stitching images is a huge part of my workflow,” says architecture photographer Andrew Pielage. One way to use your tilt-shift lens is to make a panorama by taking one picture, shifting the knob upward, taking another photo and stitching them together in editing apps like Adobe Photoshop.
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How to correct perspective with photo editing software. With the Shift function, you can get perfectly parallel lines all the way up. One of the most common examples of this is in architectural photography, where tall buildings will appear to fall backwards the higher they go. This panoramic-type function enables you to capture completely straight lines no matter where you’re positioned in relation to an object. Shifting the lens, then, is like dragging the crop box across the image to find the ideal composition.” Think of it this way what you see through the viewfinder is only a fraction of what the lens sees it's as if you were cropped into a photo in Lightroom. So when you shift, you’re moving the image circle around your sensor. “But with a tilt-shift lens, the image circle is a lot bigger than a normal lens. “With any lens, a circle of light hits your rectangular image sensor,” explains photographer Nick Ulivieri. To use the Shift knob, point the camera lens where you want the image to begin and twist the knob to shift the lens in whichever direction gets you your desired composition. You can think of it capturing a panorama without the need to physically move the camera. As the lens moves, the image plane moves too, so that the sensor records different areas of the total image. With the Shift knob, you can move the lens up and down or side to side on the body of the camera. The tilt effect alters the focal plane of the image, but the shift effect alters an image’s perspective. One way to see this in action is with miniature faking photos, where you can make real-life scenes look like a miniature scale model by blurring most of the image and shooting with a very shallow depth of field.
The ability to manipulate focus with the Tilt function is due to something called the Scheimpflug principle. You can also make two points at different distances from your camera in focus. You can create a very shallow depth of field with lots of lens blur or you can bring everything into tack-sharp focus. Once you’ve tilted your focal plane, you can use selective focus to either broaden or narrow your depth of field.
This means your focal plane, which determines the area in focus, isn’t parallel to the camera’s sensor but rather is angled in a certain direction. The Tilt knob changes the plane of focus by tilting the lens in relation to the sensor. Tilt-shift lenses have two sets of knobs: one that controls the tilt function and one that controls the shift function.
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