Maybe it was already discussed and I couldn?t find it, so I post this question anyways.
If you frame a certain picture, lets say a close up with a 50mm lens you get a certain dof. Now if you frame the exact same picture with a 100mm lens form further away, you should get the same dof, right?
Now if you shoot on 16mm instead of 35 and you want to get the very same frame as mentioned above, shooting from the same distance, you would have to use a 25mm lens -> so less dof, right?
So if you now use a 5omm lens on the 16mm camera and go further away, you stay with the same dof again, as with the 25mm (on 16mm).
In my understanding there?s no way to create the 35mm (meaning the format) dof, with a 16mm camera!? (Clearly all the setups are meant to have the same f-stop)
Please just tell me if I?m right or not, because this topic kept me discussing with dops, directors and other assistants for hours.
Thx al
p.s. I?m aware the focal length doesn?t only affect the dof, but also the feel for distances in the picture and so on, but that?s not the point in my discussions...