Hokeh? Bokeh? Well, bright out-of-focus points can be rendered as images of the diaphragm. Think of the classic movie shot done with a high ratio zoom that has millions of bright hexagons all in a row. That's not what most people mean by bokeh. Otherwise the shape of the aperture has no effect.
dh, are you planning to shoot against the light? Sunlit ripply water? Night scenes with lights in them? I ask because these and other similar situations aside, one has to work to get bright out-of-focus highlights. If you haven't yet got unsatisfactory bokeh with your old Symmar, try before putting more money in it. It may surprise you pleasantly, Copal shutter notwithstanding.
Thinking of old Symmars, what is it doing in a Copal? Most convertible Symmars were delivered in Compurs that had more than five blades.
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