Canon’s new 600mm and 800mm lenses

Started 3 months ago | Discussions thread
J A C S Forum Pro • Posts: 16,986
Re: Canon’s new 600mm and 800mm lenses

This is a rather dogmatic way of looking at DOF. With the same framing, the DOF depends on the f-stop only when it is shallow enough. The size of the upupil makes no visible difference. From the same distance, things change.

We have many variables, some of them dependent on the others, so absolute statements like this make no much sense.

With long lenses we often get strong background blur which is well outside the DOF.

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