EXCERPT page containing first few paragraphs. 2023-10-03 10:24:47
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Shutter Speed and Critical Sharpness on a Tripod
The tripod vibration test suggests that picture sharpness will degrade with certain combinations of equipment, being mostly influenced by the choice of tripod legs.
Let's take a look at how image detail is rendered without mirror lockup at a range of shutter speeds. Adobe Photoshop users can open the layered TIF file norm-all-shutter-speeds.tif to easily click layers on and off .
Test approach
To obtain the desired shutter speed, the aperture and/or ISO was varied; look for overall blur, not absolute sharpness between each shutter speed (since aperture can influence contrast/sharpness).
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Diglloyd Making Sharp Images articulates years of best practices and how-to, painstakingly learned over a decade of camera and lens evaluation.
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- Eases into photographic challenges with an introductory section.
- Covers aspects of digital sensor technology that relate to getting the best image quality.
- Technique section discusses every aspect of making a sharp image handheld or on a tripod.
- Depth of field and how to bypass depth of field limitations via focus stacking.
- Optical aberrations: what they are, what they look like, and what to do about them.
- MTF, field curvature, focus shift: insight into the limitations of lab tests and why imaging performance is far more complex than it appears.
- Optical aberrations: what they are, what they look like, and what to do about them.
- How to test a lens for a “bad sample”.
Intrigued? See Focusing Zeiss DSLR Lenses For Peak Performance, PART ONE: The Challenges, or (one topic of many) field curvature.
