Etc. means Delta and Acros. Tmax 400. Out of photographing experience and looking at my ciurves, I find that these flat grain films rise very suddenly, nothing happens then when they rise they go very straight. If you underexpose there is no detail in the shadows. My point of view. With more conventional film (especially good old Efke) the toe is gentle in its rising and with an accidentally underexposure you would still be able to salvage a bit more detail.
Originally Posted by markbarendt