A tack sharp photo is one where the main subject is perfectly focused and detailed, with no blur. Crisp edges make a photo look sharp, while soft edges make it look blurry. Many factors contribute to sharpness.
Sharpness is a combination of factors, not just one setting or technique. You can refer to these guides for more in depth information on how to achieve tack sharp images.
Tips for tack sharp images
This section offers valuable recommendations to consider.
Pay attention to Depth of Field