Hi! I have seen some nice comparisons of 50mm lenses and in my mind I thought they were supposed to be sharper than the SEL50 but lacking the added features of the SEL50. Well now I read some comments that the SEL50 is sharper center, corners, etc so is a matter of just being more expensive but also better than legacy ones. I have a Pentax A SMC 50mm 1.7 and have been wondering about getting the SEL50. Anyone has seen comparison images? Thanks!