The cokin p series p062 centre spot grey 1 filter can allow the portrayal of an object to be diffused in different coloured surroundings and has a clear spot in the centre which draws attention to the subject this filter comes in two grades p062 and p063 both grades fundamentally have the same effect however the p062 is a milder diffuser for a gentler effect whilst the p063 has a greater effect the effect given by the filter is directly influenced by the f stop and the foc