I've used that one for quite a while, and I find it pretty useful. There is one *major* consideration, though. Notice that if you switch between any Canon APS-C camera model without changing anything else, you get essentially the same result. The same is true switching between any full-frame cameras (regardless of brand). That's because the calculator uses a CoC (circle of Confusion) that is based on a rule derived in the days of film, using only the sensor size. For example, all FF cameras use a CoC of 0.030mm (30 microns) in the DoFMaster calculation.
For modern, high-resolution sensors, this results in a significant overstatement of the DoF, if DoF is defined as what truly appears sharp at 100% viewing magnification. The CoC really should be twice the sensor pixel pitch, again assuming we're using the italicized definition of DoF. For most modern large-sensor digital cameras (SLR and mirrorless) that means a CoC of between 0.010 and 0.013mm (10 and 13 microns).
Way at the bottom of the camera model list on the DoFMaster calculator is a list of CoCs that you can manually set. This is the what makes the DoFMaster Calculator flexible and useful, and it is the way I always use it. |
