Since there is no critical point of transition, a more rigorous term called the "circle of confusion" is used to define how much a point needs to be blurred in order to be perceived as unsharp. When the circle of confusion becomes perceptible to our eyes, this region is said to be outside the depth of field and thus no longer "acceptably sharp." The circle of confusion above has been exaggerated for clarity; in reality this would be only a tiny fraction of the camera sensor's area.

Since there is no critical point of transition, a more rigorous term called the "circle of confusion" is used to define how much a point needs to be blurred in order to be perceived as unsharp. When the circle of confusion becomes perceptible to our eyes, this region is said to be outside the depth of field and thus no longer "acceptably sharp." The circle of confusion above has been exaggerated for clarity; in reality this would be only a tiny fraction of the camera sensor's area.

Just when I think I have depth of field figured out I take a few pictures that don't come out clear at all.  I need to figure this out.

Just when I think I have depth of field figured out I take a few pictures that don't come out clear at all. I need to figure this out.

dofmaster.com has various depth of field calculators related to specific cameras and lenses

dofmaster.com has various depth of field calculators related to specific cameras and lenses

Depth of Field (DoF) calculator | PhotoPills

Depth of Field (DoF) calculator | PhotoPills

How to Work Out Your Depth of Field - How much area is in focus in your images! Easy to understand guide to using a Depth of Field calculator! Click through to read!

How to Work Out Your Depth of Field

How to Work Out Your Depth of Field - How much area is in focus in your images! Easy to understand guide to using a Depth of Field calculator! Click through to read!

How to Work Out Your Depth of Field - How much area is in focus in your images! Easy to understand guide to using a Depth of Field calculator! Click through to read!

How to Work Out Your Depth of Field

How to Work Out Your Depth of Field - How much area is in focus in your images! Easy to understand guide to using a Depth of Field calculator! Click through to read!

tools for: Depth of Field Calculator, Tilt/Shift Lens Depth of Field Calculator Hyperfocal Distance Calculator Diffraction Limit Calculator Photo Enlargement Calculator: Resolution & Sharpening Radius Focal Length Calculator: Subject Size & Distance Shutter Speed Calculator: Subject Speed & Distance Sunrise & Sunset Calculator for Photography Moon & Night Calculator for Photography

tools for: Depth of Field Calculator, Tilt/Shift Lens Depth of Field Calculator Hyperfocal Distance Calculator Diffraction Limit Calculator Photo Enlargement Calculator: Resolution & Sharpening Radius Focal Length Calculator: Subject Size & Distance Shutter Speed Calculator: Subject Speed & Distance Sunrise & Sunset Calculator for Photography Moon & Night Calculator for Photography

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