joe43
Well-known member
I have a technical question concerning blurred backgrounds, depth of field , maximum (widest) apertures and minimum focus distances.
For two different Nikon 300mm prime lenses, used to take the same image on the same camera at the same f stop, would the Nikon 300mm f2.8 result in the same degree of background blurring as the Nikon 300mm f4 pf lens, all other things being the same? Or would the 300mm f2.8 result in more blurring?
The depth of field calculator I used shows the same depth of field data for each lens using the assumptions below: https://www.dofmaster.com/dofjs.html
Assumptions are:
(1) D850, 300mm f2.8, aperture f4, focus distance 8 ft:
and (2) D850, 300mm f4 pf, aperture f4, focus distance 8ft.
I do know that the Nikon 300mm f4 pf has a closer focusing distance than the 300mm f2.8, but I used a focus distance that was close to the minimum focus distance of the 300mm f2.8 to keep things consistent.
Since I own both lenses I might do my own tests. Before doing so I would like to have some idea as what results to expect.
For two different Nikon 300mm prime lenses, used to take the same image on the same camera at the same f stop, would the Nikon 300mm f2.8 result in the same degree of background blurring as the Nikon 300mm f4 pf lens, all other things being the same? Or would the 300mm f2.8 result in more blurring?
The depth of field calculator I used shows the same depth of field data for each lens using the assumptions below: https://www.dofmaster.com/dofjs.html
Assumptions are:
(1) D850, 300mm f2.8, aperture f4, focus distance 8 ft:
and (2) D850, 300mm f4 pf, aperture f4, focus distance 8ft.
I do know that the Nikon 300mm f4 pf has a closer focusing distance than the 300mm f2.8, but I used a focus distance that was close to the minimum focus distance of the 300mm f2.8 to keep things consistent.
Since I own both lenses I might do my own tests. Before doing so I would like to have some idea as what results to expect.