Take extra care with the green,some real difficulties with the background colours swallowing details.
Thanks Gents, great thing about this site, ask and someone will give you advice. Much appreciated, filter has been ordered from optic warehouse, must admit paying £20 for a piece of red plastic bought a tear to my eye.
What lamp do you have? If its a Cluson drop me a note, there is a good site that sells stuff cheaper.
i wouldnt count on all green filters being the same. as made by different companys and the colour may differ to the one i use which is the logun lamp for short range and i cant fault it in any way .noel