EXCERPT page containing first few paragraphs. 2019-08-17 20:47:07
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Parts 1 and 2 of these series covered several of the key areas in making a technically optimal image. This third part discusses the sources of vibration along with mitigations for both tripod-based and handheld shooting.
Shutter and/or mirror vibration
The physical way the exposure is made has an impact on image sharpness. It can be no effect at all, or a subtle loss of micro contrast, or pronounced blur. A fractional pixel movement (a few microns!) will look sharp and motion blur will seem absent, but the image will be oddly low on micro contrast—it will seem dull and not fully sharp. Large movements create obvious motion blur but “large” as used here usually means “invisible to the naked eye” in the range of 10 microns or so.
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