Cheery Tree, Shot with the Canikkor 50/1.5 on the Leica M9, at F4. This lens is made from 3 parts lenses, front section of a Canon 50/1.5 and rear triplet from a Nikor 5cm F1.4. RF coupled using the focus mount from a different Canon.
At F1.5- "wild-wide-open", but works across the entire focal range.