Re: free fall data

["Daniel L. MacIsaac" <Dan.MacIsaac@nau.edu>]

> > Suppose a common VHS camcorder is used to collect free fall data. Would
> > it be better (from the point of view of unavoidable line resolution and 
> > pixel errors) to turn the camcorder sidewise? Are the more expensive
> > camcorders better than ordinary VHS? How much better? Assume that frames 
> > are digitized at the best available resolution of 680 by 480 pixels.
> >
> >                                                       Ludwik Kowalski
>
> The definition in the vertical and horizontal axis of the TV picture
> are meant to be comparable. There is a seperate issue concerning
> transmitted pictures which can show momentary or persistant horizontal

The key is to get as high a shutter speed as possible.  This means less 
movement during the frame recording.  Too fancy a camcorder may mean no ability
to set the speed to its fastest.

Dan M

Dan MacIsaac, Assistant Professor of Physics and Astronomy, Northern AZ Univ
danmac@nau.edu  http://www.phy.nau.edu/~danmac/homepage.html