Panoramic Photography

My last post of the Dells of the Eau Claire River is panoramic photograph. It was constructed from a series of photographs that then have been combined into one.

Meticulous attention to detail and the use of specialized equipment is used to ensure a technically correct panograph.  Each image must be taken with exactly the same exposure, focal length and aperture.  I start by metering the entire scene to determine an average exposure setting then manually set the shutter speed and aperture. A tripod is set up with a panning head aligned with the horizon using a level.  The camera is mounted using a special L bracket oriented in the portrait mode.  The use of a special bracket is necessary to eliminate parallax error.

When taking multiple images that will be combined into a panogram, rotate the camera about the focal point of the lens to eliminate parallax. (This image was downloaded from the internet years ago, I do not remember the source, my apology to the author)

When combining two images, the common elements must exhibit the same spatial relationships. If they do not (called parallax error) the resulting combined image will contain double images. Close one eye, hold a finger out in front of the open eye then turn your head.  If you rotate your head about the axis of your neck, you will see your finger seeming to move faster than distant objects. If you try to rotate your head at the axis of your eye, you will notice your finger maintains a constant spatial relationship to distant objects. When doing so you are rotating at the nodal point of your eyes.

Cameras tend to mount to tripods at a point on their body, usually several centimeters behind the focal point.  An L bracket allows the camera to be rotated at the nodal point eliminating any parallax error.

Once the overlapping images are captured, they are transferred to a computer and digitally stitched together using Photoshop.

This image was down loaded from the internet years ago, I do not remember the source. My apologies for not providing credit to the original source.

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