As it happens, many of the houses here on the island have no letterbox slots in the door or else have them screwed or taped shut. It's the wind you know, blowing this way and that at high rates of blow-ness. So Ihave a couple of old cameras that I can change in the letterbox shape exposure as some sort of compensation [see what I did there? Pathetic I know!]. Nice little cheapie cameras like the one Joel Lintz uses. I like mine - Pentaxs.
I took the Pentax Espio Mini on holiday with me and had some fine fun.
See, lovely for boats and, some wildlife snapping too :-)