Asobinet found a Sigma 150mm F2.8 DG DN Macro patent that is interesting for photographers that like telephoto macro. Focus distance 146.25 83.49 55.51 F number 2.91 4.37 5.82 Full frame angle 2ω 16.67 11.36 6.91 Image height Y 21.63 21.63 21.63 Lens overall length 171.21 171.21 171.21 Overview [Publication Number] Japanese Patent Application Laid-Open No. […]
