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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

DOF with 1.4 and 2.0 (1 Viewer)

Peter Ericsson

Well-known member
Someone told me that the two above mentioned extenders give the same dof when used on a 600mm lens.

Since one gives a focal length of 840 and the other 1200 shouldn't the dof be more shallow with the 2.0? (using the same aperture)

Peter
 
Sorry, just reread so to clarify:
If you keep aperture constant then yes, dof will change due to changing length.
If you allow aperture to change by keeping it wide open, dof will not change.
 
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