Archived posting to the Leica Users Group, 1997/07/25
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 08:33 AM 7/25/97 -0700, you wrote: >On 25 Jul 97, ted grant wrote: > ><snip> > >>Think about making an exposure of 1/8000 of a second! >> That means the mirror goes up and down in almost the same time frame. To >> the extent you do not think you have lost the image, when in actual fact >> you lost it for 1/8000 of a second! :) > >Doubt this, but I'm a bit confused by your syntax above. I suspect that >the mirror has a finite physical limit on how fast it can go up and return >to rest. Shutter speed beyond this merely means that the mirror does the >best that it can, while the exposure is actually made in less time than >the mirror was operating. > >Technology keeps allowing faster cyclic speeds for the mirror, but I doubt >that it's cyclic rate has reached 1/8000 second yet. Don't have >specfications here that say; does anyone know the minimum mirror cycle >time for the R8? >-- >Roger Beamon My thoughts on the subject... There is a minimum time your eye/brain can recognize. It's not very short otherwise we would see the black between the frames on a motion picture, or the retrace on a TV. I know some MP runs at 24fps. These things look continuous to us because we cannot register the short interruption. There is no way a camera mirror is going to flap so fast that you cannot see the blink. Because you can see it, it's pretty slow. Erwin... any comment? Jim