Mono Monday unfocused

Thank you for the challenging themes for October. This one hosted by 60plus.
Unfocused. My least favourite of the month I think. I have to confess it was so difficult getting my camera not to focus that I ended up editing and faffing in Snapseed instead. But it was a good challenge and I feel I’ve learnt some things this last month, so that’s good too.
I walked round to the postbox this afternoon and thought that might be a good subject.