Hi Thomas,

I think I see what you're getting at regarding the dynamic of the contrast filters - a half grade difference is a half grade difference wherever it's applied.

Would it be correct to say though that if you begin with more mid-tone detail on the negative (less gradient on the exposure curve) and then increased the contrast that you would retain more detail in the mid-tones than if you began with a steep gradient on the exposure curve and expanded that by decreasing contrast?

I agree all this is fascinating and for me being able to portray light the way silver prints do and being able to do this at home is quite an amazing thing.