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EXCERPT page containing first few paragraphs. 2019-06-18 11:19:50

Nikon D810
Nikon 19mm f/4E ED PC-E

Shifting for Stitching: Double the Camera Megapixels

The Nikon 19mm f/4E ED PC-E is essentially a rectilinear fisheye lens that covers a large medium-format size image area. Shifting captures an image area that is off-center. By combining these images, a much larger capture area is possible.

By taking a center image (shift control zeroed), a second image shifted fully 12mm and a 3rd image shifted 12mm in the opposite direction, the width or height of the frame can be extended by 24mm (12mm x 2) yielding in effect the following sensor sizes:

The key question is whether the lens performance holds up well enough for those extra capture pixels to be worth capturing. With nearly all shift lenses, the answer is a resounding “no” because image quality declines too much.

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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.

Want a preview? Click on any page below to see an excerpt as well as extensive blog coverage, for example on Nikon or on Canon or on Pentax.

f11 @ 25.0 sec, ISO 64; 2016-12-03 18:42:03 [3 frames stitched]
NIKON D810 + Nikon 19mm f/4E ED PC-E

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