These are samples from Pentax SMC P-DA* 55mm f/1.4 SDM lens and various Pentax digital SLR's.
Pentax SMC P-DA* 55mm f/1.4 SDMSunset near MancianoSoraIMGP4740.JPGPentax SMC P-DA* 55mm f/1.4 SDMPentax SMC P-DA* 55mm f/1.4 SDMHojrakPentax SMC P-DA* 55mm f/1.4 SDM