Reflective Wall -- NEX-5N & Carl Zeiss Jena Flektogon 25mm f4. Click for larger size.
I ventured past Bathurst Street on Queen Friday on my daily lunch-hour walk, since I have not gone that far before. On my way back I saw this second hand store and decided to have a look. Asked the owner if he had any old lenses, and indeed he did. A really nice looking Flektogon 25mm f4 in Exakta mount. It's too bad that the inside is slightly hazy, and this really would affect the flare resistance of the lens. Anyway, since the price was pretty reasonable, I decided to buy it. Embarrassingly, I have never heard of a 25mm Flektogon before. Always thought that there was only the 20mm, and 35mm focal lengths only.
Indeed the lens is very sharp at f4, but the edges are not excellent sharp until f8. The flare is as expected, pretty bad and the contrast suffers a bit in strong lights, but is totally usable for the time being until I can find some place that can clean it cheaply.