Panasonic AK-HC910L Operating Instructions Manual

Panasonic AK-HC910L Operating Instructions Manual Manual pdf 15 page image

- 15 -How to Adjust_ White balance adjustmentAdjust the white balance after shooting a white object by at least 50% of the screen.NOTE: If the white signal level is over 100% or less than 50%, the white balance maynot be normally adjusted.Colour temperature outdoors may vary depending on weather conditions.NOTE_ Colour temperature and white balance adjustment (reference)When carbon is burnt, it developsvarious colours of light depending on thetemperature. Natural light can bespecified by colour temperaturereflecting to the colour developed whencarbon is burnt.The light of 3,200K (K=Kelvin, –273°Cequals to absolute zero temperature 0K)represents the same value (colour) aswhat develops when carbon is burnt at3,200K (2,927°C). The relationshipbetween the colour temperature of thelight source and weather condition isindicated in the right figure. Let’s studythe difference of shooting an indoorobject from shooting one outdoors.Studios are usually lit with incandescentlamps and the colour temperature of awhite object in a studio is around3,200K. The colour temperature of awhite object outdoors is around 6,500K.The former may look a little yellowishwhile the latter appears somewhatbluish when they are shot by a camera.However, the human eye does not recognize colour differences among these objectseven under different ambient lighting conditions, because of their adaptability to light.The video camera reproduces colour differences with high fidelity and the colour of anobject somewhat different from what appears to the human eye.Therefore, there is a need to adjust the white balance in order to correct differencesbetween colour temperatures.10000K Blue skyRainyPartly cloudyCloudyAWCFineFluorescent lampHalogen lampTangsten lampCandle9000K8000K7000K6000K5000K4000K3000K2000K1000KColour temperature values