Replying to progressive scan/interlaced question

hey, i was wondering how bad you could notice the interlacing on video if i had the shutter speed up around 1/250 or so? if you can, would a higher shutter speed help? what type of ccd (progressive or interlaced) would be better for shooting skiing (seems sort of stupid, but i am just trying to understand the differences between these)? also how would either of these affect slow motion? thanks



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