Through December 14 - Miriam Böhm: Before in Front at Ratio 3. This was my first visit to Ratio 3's still-new storefront on Mission near 24th Street BART, and the space in its contours and in its side room holds some uncanny memory of the gallery's previous Stevenson address. Perfect then to see Böhm's images in this context, with her work that challenges the notion of what is seen and what is true in a photograph. The exhibition contains five recent suites of photos, each series peacefully isolated from the others in the room and sometimes leading the viewer around the crook of a wall. The shapes she photographs can be deceptively simple, but as you look more closely there is evidence of cutting, layering, general trickery. My favorite was the Match series (Match I pictured at the top above) in which folded paper seems to mimic a shape etched into the background, only that the lines start to cross each other in way that defy physics until you don't trust your eyes anymore. It could be a statement about the untrustworthy nature of photography itself.