Smooth Trans Focus Fujifilm Fujinon XF 56mm F1.2 R APD Minolta Minolta Maxxum 7 Minolta STF 135mm F2.8 T4.5 SEL-100F28GM STF function Soft focus Sony FE 100mm F2.8 STF GM OSS Sony α STF 135mm F2.8 T4.5 T-stop Venus Optics Venus Optics Laowa 105mm f/2 Smooth Trans Focus