The one feature article item - and - shoots still have over DSLRs is the ability to shoot video recording clip . DSLRs are optimise in the other way — the mirror setup , specialised car - stress systems , etc . Hiroshi Terada ’s patent of invention for a moving-picture show mode on DSLRs has one big design — a semi - transparent mirror — and then pulls a PS2 - on - PS3 emulation trick , get up in the components necessary to shoot solid video alongside the DSLR ’s unconstipated components .
for scud at 30FPS , Photography Bay note that a DSLR ’s mirror would have pass over up and down at least three times quicker than Canon ’s EOS-1D Mark III . Terada ’s semi - transparent mirror does n’t move , but lets 70 percent of the visible radiation through to the image sensor , enough for video . The reflected 30 percent takes precaution of your uninterrupted phase - espial autofocus .
The letters patent actually uses two different autofocus systems — one for still icon shot , and then another for clip , which has a wider AF room access ( DSLRs tend to have a very minute one ) and a slower , smoother AF speed ( vs. the scant stop number you want for still figure ) . A cropping function would take care of field of operations of view change that happen during AF shifts .
After alive View , this was the only lieu left to go — the interrogation is when we ’ll see these first Zapruder - adequate to DSLRs , though the next multiplication does n’t vocalize like an excessive time skeletal system . [ USPTOviaPhotography ]
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