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Canon 35mm f/2 IS vs Sigma 35mm f/1.4 Art bokeh comparison

Started Oct 21, 2015 | Discussions thread
kotmj Contributing Member • Posts: 571
Re: Canon 35mm f/2 IS vs Sigma 35mm f/1.4 Art bokeh comparison

Peter Karbe of Leica said in an interview on the 50/2 M APO that what they tried to achieve with it that was different from most manufacturers is that the MTF needs to fall off steeply away from the plane of focus. That is, the object in focus has great macro and microcontrast -- very high and level MTF curves -- but that the objects infront of and behind the plane of focus have intentionally bad MTF curves. The out-of-focus areas have low contrast and resolution. This difference in contrast between the object in focus and those OOF is what makes for the pop.

He further said the Japanese would never think of doing this.

Leica has had different philosophies in this regard over the decades. Mandler had a piece published where he stated that in what he called "pictorial" photography, even the OOF areas should have high contrast.

Maybe Sigma caught on to Karbe's thinking, or arrived at it on their own.

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