If you look to the left of the first image in this post you'll notice the pink blossom of a cherry tree. I thought it'd be quite noce to get a shot of these flowers with a blurry background mixture of the sky and other blooms. I put my camera on a tripod with an 85mm lens attached and took three shots at different apertures. A couple of things intrigued me. Firstly there's a significant difference in sharpness of the "focussed" blooms when you compare the f1.4 and f4 shots. Makes me wonder if I need to fine tune the autofocus! Secondly there really is a big difference in background blur, or bokeh, as you open up the lens. There's much more difference between f1.4 and f2.8 than I was expecting.
Oh well, such a lovely day today I'd better get out and enjoy it!!