25mm 焦段比較實用你有75mm的話 42.5mm感覺不太需要這裡有42.5mm vs 45mm vs 75mm 1.8 散景比較http://www.cameralabs.com/reviews/Panasonic_Leica_DG_Nocticron_42-5mm_f1-2_H-NS043E/bokeh_comparison.shtml
m43的定焦鏡群裡,12mm f/1.4, 25mm f/1.2 及42.5mm f/1.2這三顆真的都很優,我也曾收齊了不過後來把42.5出掉,人像糖水照的部份就用FF機器補上(但現在想再補回這支).題外話,300mm f/4 也是必收的。