Your equipment will have an effect on your final images, so you'll want to know how to get the best performance using the tools you have.
- What is optimal ISO for the best tonal range?
- What is the maximum ISO for acceptable noise?
- At what aperture is your lens the sharpest?
- What does the accutence field map look like?
- What exposures can you successfully hand-hold?
- What type of tripod can work in the field?
- How to mitigate sub-optimal situations
I recommend using DXOmark test data to glean insight about sensor performance. This table shows a summary for a Sony A6500 camera; it indicates excellent color depth, dynamic range, and low-light performance.
It means I could shoot with ISO 1600 (1405) with acceptable results, which means I can hand-hold in daylight at f8.0 at 1/250th.
DXOmark also tests lens/camera combinations that will show sharpness, distortion, chromatic aberration, etc. This chart shows the acutance map for a Sony E-mount 18-200mm lens, indicating that is sharpest at f8.0 throughout its zoom range.
It means I can shoot aperture-preferred at f8.0 for best sharpness.
Many times I want to take a picture when I don't have all the proper gear for the optimal image. Perhaps the ISO is too high for maximum tonal range or dynamic range; in these cases, I often do hand-held auto-bracketing at 2ev intervals. I can combine these later to build a higher range image.