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Anonymous
I said it before, I'll repeat it again. The STF gives blurring which is as close to the mathematically perfect Gaussian blur as possible; the problem is, our eyes are not like that. A human eye produces a circular, outlined and in many cases irregular bokeh (this depends on what we're looking at since the pupil is flexible), so images from the STF look unnatural. Thus, as any other "unnatural" photographic effect (ultrawide/fisheye, HDR, IR, etc.), it should be used sparingly.
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