The Art of Shooting Progressive

He mentions 50p and 60p, then totally forgets about these rates and continues the article with the premise that progressive equals to slow film rates. It is not. Progressive does not mean stuttery video. Progressive means "non-interlaced". He should have named his article "the art of shooting at contemporary movie-like frame rates".

I still like this one better, less blah, more info: http://hd24.com/dont_shudder_at_the_judder.htm
 
I wish people would stop using the word "judder" when they really mean "strobing". They are two entirely different effects, caused by two different things. "Judder" is when the frame rate is not constant, e.g. the 3-2 pulldown in film-to-video telecine, and the movement in the image is not smooth (it goes alternately faster and slower several times a second, because of the unequal frame rates for the individual images). "Strobe" is when persistence of vision is impeded to some degree, because of, e.g., a slow enough frame rate, a fast enough camera shutter, and/or too long an interval between the individual projected images. Strobing can occur in both film and video, but judder should generally only occur in video (as only as a result of the telecine process; it wouldn't be in an image originated on video). If judder occurs in 24fps film, it's either because it was an effect deliberately created for some purpose, or the film was converted from original material that was not 24fps.
 
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