The ISO of the XDcam PDW-530p...using a light meter
Posted 16 July 2006 - 11:04 PM
Lighting and adv cinematography. Anyone know the ISO of
I would be interested to know now as we
are being taught to shoot video film style using a
Posted 17 July 2006 - 07:00 AM
I suggest you make tests on this basis
Posted 17 July 2006 - 07:55 AM
I am curious now while on the course what it is..definately will test it when returning home (Israel), although I think I will be a bit busy!
Posted 17 July 2006 - 09:22 AM
The math is N²/t = E.Siso/250
Where N is the iris value, t the exposure time (typically 1/50 s) E the requiired illumination in lux
There is an empiric rule "1, 2, 4" : 100 iso 2000 lux N (or F) = 4 that you can also put as : 1000 lux, 200 iso, N/F = 4
Posted 17 July 2006 - 03:56 PM
But this thread is kind of flying in the face of the other thread in the SDX900 forum asking the same question about that camera. The SDX is more sensitive than the PDW5xx series.
Posted 17 July 2006 - 06:07 PM
I assume this is the standard measurement method used by all the camera manufacturers.
I expect it doesn't include the transmission losses you'd find on a zoom lens.
Edited by Brian Drysdale, 17 July 2006 - 06:09 PM.
Posted 17 July 2006 - 07:09 PM
Posted 18 July 2006 - 03:59 AM
Interesting point. Video and cinema lenses in general are supposed to be marked with T stops, that take account of this loss.
Certainly film lenses are marked in T stops, however, I've never seen a standard video lens having T stops and only f stops are usually given in their spec sheets.
Although, the Canon HD Electronic Cinematography lens do have T stops mentioned in their specs. However, the ENG/EFP versions have their aperture given in f stops.
For example the Canon HD 11 x 4.7 EC is T2.1 and the ENG/EFP version is f 1.9.