Hi I appreciate it's just a diagram, but could you easily turn the upper lens round ? It would give a plausible mechanism for the different effect ... Thanks ! -- 195.137.93.171 ( talk) 01:01, 24 February 2013 (UTC)
Hi I appreciate it's just a diagram, but could you easily turn the upper lens round ? It would give a plausible mechanism for the different effect ... Thanks ! -- 195.137.93.171 ( talk) 01:01, 24 February 2013 (UTC)