Lomography has launched two new Petzval optics to complete a five-lens series. These are the Joseph Petzval Focus-Coupled Bokeh Control 27mm f/1.7 and 135mm f/2.5 Art Lenses. If you’ve never heard of a Petzval lens before, they can be traced all the way back to 1840, when Slovak-Hungarian mathematician and physicist Joseph Petzval pioneered the design. The Joseph Petzval Focus-Coupled Bokeh Control 27mm f/1.7 Art Lens (Image credit: Lomography)The two new additions bookend the series, with the 27mm f/1.7 and 135mm f/2.5 being the widest and longest focal lengths in the line-up, respectively. Check out our Lomography Petzval 55mm f/1.7 MkII review.