The flowers in our back yard are very popular with butterflies and, with nice evening light in the garden, I was bound to drag out the macro lens.  However, when I tried getting some shots, the camera was having a really hard time focusing.  I often ended up using the manual focus ring to get something close when the camera kept focusing on the background.  I had struggled with a couple of other subjects previously and I was beginning to get really annoyed.  This was not a cheap lens, and the camera certainly isn’t cheap but why wouldn’t it focus on a butterfly?  I was using animal mode so thought it would cope.

I ended up trying different focus area modes.  Narrowing it down to the small focus spot and moving that around by hand rather than using the subject detection modes was my next effort.  I seemed to have some better luck, but it still was unreliable and was giving me a red box around the focus area.  Why wouldn’t it work.  I took a look in the menus to see if there was something in there which was going to be an issue but nothing there either.  I was beginning to be fearful I had a dud.  Then I noticed something.  The focus limit switch had moved from the full range to having a minimum focus distance of 0.5m.  That would certainly be an issue.  Put it back to where it should have been and suddenly the focus was working perfectly.  What a dope.  Not sure when I had knocked that switch but it might have been a while back.  Doh!