Thanks everyone - I'm not sure how old it is I got it second hand - yes it did work and then stop.
Sorry to be dumb but clutch???? What part is that. Also I have read on Internet it's advisable to try cleaning the electric contacts - any ideas on what with?
jomantha said:Thanks I'll give all that a go tomorrow evening. Fingers crossed - a repair is pointless at those prices - I'd be as well to get a new lens.