apertures wide

Nipped round Caroline and David's for a sort of chrimbobirthdaychitchatthing and had a very enjoyable couple of hours putting the world to rights. I noticed that recently all my shots were at f3.5 or 2.8 and then discovered that the aperture doesn't shut down from wide open. Luckily sigma offered a 3 year guarantee and it still has 6 months to run. Not too chuffed with Sigma - my 10-20 is with them atm being put right.