Depth of field and Hyper-focal Distance calculator.
Quickly determine your estimated depth of field prior to capturing images.
Gain a better understanding of how settings affect the depth of field.
Quickly determine the hyper-focal distance.

Color and grey Palettes that you can screen capture then compare the images against a calibrated screen. This is a quick easy way to determine of your devices color display is vastly different when compared to a calibrated screen.