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Nikon 28mm f/4 PC-Nikkor
Without shifting, sharpness is quite good when stopped down to f/8 or f/11. Sharpness when fully shifted is acceptable on reduced-frame sensors such as that found in the Nikon D70, but blurry on full-frame sensors.
Nikon 28mm f/4 PC-Nikkor Hot spots
Hot spot behavior is excellent, perhaps exemplary, though field use might prove otherwise if direct sunlight strikes the front element.
Nikon 28mm f/4 PC-Nikkor backfocus
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Diglloyd Infrared Photography covers cameras and lenses for infrared photography.
The coverage explains all the issues involved in shooting for monochrome and in infrared. It is not a review of any particular camera or lens, though many examples are included.
- Monochrome vs color cameras.
- Post processing for monochrome.
- Guidance on workflow for infrared, including black and white and channel swapping for false-color images.
- How infrared renders, and why certain spectral cutoffs matter: false color vs black and white.
- Image quality issues to be on the lookout for in infrared.
- Numerous lens evaluations in infrared.
View an overview of infrared as well as filter spectral transmission plus examples from an optimal lens.