4th January 2004
This is another Zoom ident, this time with the light-spots on a light blue background.
If you know why there were two variations, one grey and one blue, please let me know!
I do know that a blue Zoom was broadcast before the last ATV Today - perhaps the blue Zoom is a later variant.
A possible explanation is that the blue Zoom preceded programmes made in Birmingham and the white Zoom came before programmes made at ATV's Elstree Studios in London.
Chris seems to remember that the blue Zoom preceded, more often than not, schools' programmes.
Of course, any (or none, or both) may be true, and the original purpose for there being two was abandoned, meaning that it was the programme producer's personal choice would be used.
Mark Boulton writes: "An important point to make about colour telecine machines from the 70s and 80s - whereas some machines (the more expensive), scanned all three primary colours (Red, Green and Blue) using dichroic filters and three separate tubes, some of the cheaper machines scanned only two of the primary colours (Red and Blue) - and Green was derived by subtracting the Red and Blue output from the monochrome output. Studio cameras also did this - Green was picked as the colour to derive since it has a higher luminance ratio than Red and Blue. Also, the monochrome tube used for the b/w image from which the green was derived would very often be a more old-fashioned (and hence cheaper), tube as developed for the black and white studio cameras.
"This resulted in some studio recordings and, some telecine outputs, to show a marked tendency towards a green wash where in actual fact the colour SHOULD be grey.
"The 'white' in the middle of the light-spots is brighter than the so-called 'white' background which actually a slight blue-green tint anyway. I think the 'green' tendency probably brings this out more. There is, however, probably more blue than green in the backdrop colour."
There was in fact more than one version of the In Colour Zoom made - more to come on that later, so it's entirely possible that a different coloured background was used as well. A deeper analysis is to come.
MPEG available.