Re:Fujifilm’s new X-H2 finally pushes its APS-C camera syste...
by radford-neal on Saturday September 10, 2022 @11:37AM
(#32791567)
In theory, the only benefit of FF over APS-C is when using very wide apertures.
For example, you might using a FF camera with a 52mm f/1.2 lens, in order to get the very shallow depth of field this gives and/or the very high light-gathering ability. A good 52mm f/1.2 lens is expensive, but quite feasible (they've existed for many decades).
To get the equivalent effect with an APS-C camera, you would need a 35mm f/0.8 lens. As far as I know, no such lens exists (though it's theoretically possible to construct a lens as wide as f/0.5).
In practice, FF may have other advantages, due to engineering considerations. For example (though I don't really know), it might be that electronic noise from the rest of the camera has more effect on noise during pixel readout when the pixels are smaller.
For example, you might using a FF camera with a 52mm f/1.2 lens, in order to get the very shallow depth of field this gives and/or the very high light-gathering ability. A good 52mm f/1.2 lens is expensive, but quite feasible (they've existed for many decades).
To get the equivalent effect with an APS-C camera, you would need a 35mm f/0.8 lens. As far as I know, no such lens exists (though it's theoretically possible to construct a lens as wide as f/0.5).
In practice, FF may have other advantages, due to engineering considerations. For example (though I don't really know), it might be that electronic noise from the rest of the camera has more effect on noise during pixel readout when the pixels are smaller.