Saturday, 11 May 2013

Exercise: Tungsten and fluorescent lighting


'Find two different rooms lit by tungsten lighting. Take 3 photographs in each location, identically composed, in each location. Note the differences. What about colour quality?'

I was surprised at the amount of change in each exposure when the white balance setting was altered. The colour differences are quite marked, especially in the exposures with a fluorescent setting.



W/B: automatic   ISO 800   f4.5   1/100




W/B: tungsten    ISO 200   f4.5   1/30




W/B: fluorescent   ISO 200   f4.5   1/30



W/B: automatic  ISO 1600   f5   1/80





W/B: tungsten   ISO 1600  f5  1/80




W/B: fluorescent  ISO 1600  f5  1/80



'Compose a photograph with interior tungsten lighting and exterior light at dusk. Wait until interior and exterior lights are about equal and take three photographs'.

This also turned out to be an exercise in 'read the instructions...!' I forgot to use interior tungsten light, shooting instead a balance between the exterior and interior natural lighting... So I have downloaded a table of sunrise, sunset and dusk times. Let's hope I remember to use it sometime soon!

But, just for the record, there was a noticeable difference in each of the three exposures as the white balance setting was changed. The tungsten setting - even though there was no tungsten light source to respond to! - works best for my eye.


W/B automatic   ISO 800   f4.5   1/100



W/B daylight   ISO 800   f4.5   1/100

W/B tungsten   ISO 800   f 4.5   1/100

These are a few photographs taken with my phone camera during a concert. I am presuming that the stage lighting is all tungsten-based, but I am happy to be corrected. They are purely 'point and shoot' snaps, taken just to capture the image of light at work in these circumstances.














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