10-24-2019, 10:24 AM
(This post was last modified: 10-24-2019, 10:26 AM by Brightcolours.)
(10-24-2019, 09:32 AM)Klaus Wrote: What has the T-value to do with the depth-of-field (unless we are talking about a truly black zone that is smaller than the aperture)?
I suppose the apodization element can have an impact on PD AF but it should be irrelevant for CD-AF.
However, an 85mm f/1.2 is hardly aligned to action photography - at f/1.2 it's more than a gamble to hit the correct focus point in this case.
(And I do still enjoy the Fuji 56mm f/1.2 APD and see no reason for changing the verdict)
Why is the T-value lower? Because you have a.... gradually closed aperture, that is why. So yes, the DOF is less shallow, wide open. See above image (very clear to see).
This is always the case, whether it is this Canon DS lens, a STF lens from Sony or APD from Fuji.