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Introduction to Tilt/Shift
Shift to correct converging verticals — rise and fall
When the camera is angled up, say at a building, the building appears to lean backwards— keystoning. This is caused by the non-parallel alignment of the film/sensor plane and the subject.
The shift function of the lens allow the correction of such effects; the camera can be positioned so as to be parallel to the building or similar subject, then the lens can be shifted upwards (“rise”) to include the subject, all while remaining parallel to it. The same principle applies in shifting the lens down (“fall”).
Essentially, a shift-capable lens is a WIDE ANGLE OF VIEW LENS (not to be confused with focal length!), that allows the photographer to choose what section of the image circle to record.
Magic depth of field with tilt or swing
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Diglloyd DAP is DSLR-oriented, but also contains workflow and other topics. Much of the focus is on Canon and Nikon but also Pentax and Pentax medium format.
Special emphasis is placed on lens evaluation, focusing on Canon and Nikon and Sigma lenses, but with a few others like Rokinon/Samyang.
- Make better images by learning how to get the best results right away.
- Save money by choosing the right lens for your needs the first time, particularly some of the new Sigma Art lenses vs Nikon and Canon.
- Workflow discusses image organization, raw conversion and post processing. Many examples show processing parameters for direct insight into how the image was converted.
- Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to full camera resolution, plus large crops [past 2 years or so].
- Real world examples with insights found nowhere else. Make sharper images just by understanding lens behavior you won’t read about elsewhere.
- Aperture series from wide open through stopped down, showing the full range of lens performance and bokeh.
- Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.
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