Re: [photo-3d] Hyperstereo from airliner - frame rate?

["Dr. George A. Themelis" <drt-3d@xxxxxxx>]

Hello Bill,


> A while back there was reference to taking hyperstereo from an airplane
> using a motordrive. I was wondering what a typical time between frames might
> be. Do you space them out, say a second apart, or do you just fire off a few
> frames in continuous mode? I'm using a Nikon FM/MD-12 which runs around
> 3fps, if that helps. I'd really like to try this the next time I fly.

It depends on how far your subject is... You can get an idea by
noticing how fast things are changing (parallax).  If the clouds
are close or if you are in take off or landing situation then things
change quickly and you might need the 3fps.  But if the clouds
are far away then you could take shots a few seconds apart.
A common mistake is having too much parallax or leaving
too much time between shots which makes the resulting
pairs difficult to mount/view/project.  It helps to bracket.

> As a side note, has anyone had any problems with the airlines about shooting
> with motordrive on approach or departure? Do they consider the drive to be a
> restricted electronic device? I assume they would want the camera stowed on
> landing or takeoff.

No, never had a problem.  The main problem is finding a good
seat in the plane, i.e. not too close to the wing (so the wing
is not in the picture) by the window, a clean window, sun
in the back, etc.

A normal lens works well.  Wide angle lenses might pose a
problem.

George Themelis