J
jgban
Austin,
I don't know anything about the technical questions here, so I can just report observations.
I think it is a design flaw. However when I said that the same thing happens with the AX I was just trying to point out that every single Contax camera has had that limitation with AE lock and "variable aperture" zooms. In my test with the AX I used the 100-300mm 4.5-5.6 zoom. My understanding (I may be wrong) is that, in that lens, when the aperture ring is set to 4.5 but the focal length is 300, the effective aperture is, in fact, 5.6. This seems equivalent to the 70-300 f4-5.6 for the N1-NX.
The difference is that the N1/NX tells you the change in effective aperture in the viewfinder display. The aperture ring on the lens may point to "4", but the viewfinder says 5.6.
This information is passed to the processor that calculates exposure. If you zoom on a grey wall (WITHOUT locking the exposure), the speed does change appropriately, at the same time you see the change in the displayed aperture. The issue seems to be what the camera actually "locks" and how this is unaware of the changes caused by the zooming.
Juan
I don't know anything about the technical questions here, so I can just report observations.
I think it is a design flaw. However when I said that the same thing happens with the AX I was just trying to point out that every single Contax camera has had that limitation with AE lock and "variable aperture" zooms. In my test with the AX I used the 100-300mm 4.5-5.6 zoom. My understanding (I may be wrong) is that, in that lens, when the aperture ring is set to 4.5 but the focal length is 300, the effective aperture is, in fact, 5.6. This seems equivalent to the 70-300 f4-5.6 for the N1-NX.
The difference is that the N1/NX tells you the change in effective aperture in the viewfinder display. The aperture ring on the lens may point to "4", but the viewfinder says 5.6.
This information is passed to the processor that calculates exposure. If you zoom on a grey wall (WITHOUT locking the exposure), the speed does change appropriately, at the same time you see the change in the displayed aperture. The issue seems to be what the camera actually "locks" and how this is unaware of the changes caused by the zooming.
Juan