- Location
- Switzerland
- Real Name
- Matt
That's strange - my 45mm is an exceptionally sharp lens. Shallow DoF, perhaps? All fast lenses need stopping down for certain applications, but I'm sure you're aware of that. The 45mm does a very pleasing job at subject isolation - but that's not always what you want, of course. Stop it down to f/2.8 for even stronger IQ and a lot more DoF - it's aMy daughter has the 45, and it is fine for portrait use, but to my eye , it's a bit soft for my use.

The 30mm f/1.4 does even better at subject isolation at close quarters - and thus it also needs stopping down for compelling DoF, f/2.8 and f/4 are very useful and beautiful.
M.