DOF Expert

DOF Expert allows you to check the background blur and depth of field according to several shooting conditions. (DOF means Depth Of Field)

You can set the focal length and f-value of lens, crop ratio of body and focus distance. Also it allows you the multiple settings to compare together. Each setting is easy to distinguish by specified unique color.
In two ways, focus distances can be set in a lump:
• Same length of subject - by considering the focal lengths and crop ratios, set the focus distances in assumption of taking pictures of specified subject with same size.
• Same focus distance - regardless of any factors, set the focus distances with the same value.

The result graph shows the size of the circle of confusion according to the distance between the subject and background, this represents the degree of background blurring effect. You can see the depth of field for each shooting condition visually.
(Permissible circle of confusion is 0.03mm for 35mm film and full-frame DSLR.)

DOF Expert helps you understand the optical characteristics of your equipments.