ISO setting for Phantom HD
Posted 19 September 2008 - 08:09 AM
I recently had a chance to see Phantom HD camera. The ISO rating for the camera is officially said to be ISO 600 under the sun and it changes in different wave length situations,,ie Cloudy day, tungsten light,,,,.
I personally wanted to see what is its ISO rating for the starting point for DPs. I initially used a chart consists of black , white and 18% gray. Set my meter to ISO 600 and the shutter angle of Phantom is set to 360 degrees. A histogram chart on PC was the guide for adjusting the lens apature as well as a wave form monitor. After a quite few comparison, I came up with ISO 200 instead of ISO 600 under both tungsten lighting and sun. I did not have a chance to take a shot of the gray card taken into a post house, so this test was not 100% accurate.
I was surprised with this result and I questioned myself if I did this test correctly.
I would like to ask DPs who has had experience with Phantom HD, how they set the meter.
Posted 19 September 2008 - 10:18 AM
Posted 19 September 2008 - 11:15 AM
When using Phantom, you would have nothing to rely on in terms of colour and contrast ratio ,, ie the image on a monitor is not what you get as it does not show the actual raw file image. ( If you record HD/SDI image on to tape, the image on the monitor will be what the outcome .)
What you can really rely on is the histogram chart comes up on the pc screen and the best you could do with it is to put the image within its range.
Would "Play safe and let every adjustment be done in post" be the word for HD shoot ?
Posted 19 September 2008 - 11:56 AM
Posted 15 May 2013 - 01:14 AM