Filmscanners mailing list archive (filmscanners@halftone.co.uk)
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: filmscanners: Shutter sync speeds - WAS : Pixels per inch vs DPI
My Dimage 7 digicam syncs at all shutter speeds upto 1/2000th (which is the
fastest the camera's shutter can operate).
There is a mechanical shutter inside the camera. This is used to stop light
getting to the CCD while the data is being read out of it. If light falls
on the CCD during the read phase it leads to roughly 30dB more noise.
I think Minolta film cameras have a long history of ultra-fast flash sync
speeds - but I've never owned one...
A high sync speed means that fill flash is practical in bright conditions,
e.g. full sunshine, but people's faces in shadow - without having to stop
down.
Jawed
|
