Thanks all.
Paul, there probably is but with a major city centre 2km from my door step

and the fact that in total there is only 2 blues 2 reds and 1 green sub

stretching the data isn't really a option.
Admittedly if i put another 3 or 4 each in the colour I'de probably start pushing the envelope! That and i have to sort a flats panel out to sort a slight light drop off and dust motes
Trev

good quality filters make getting the colour just right... easy!
You just have to love un attended capture. Makes imaging so much easier. Till next time!