The 50 1.4 if a super lens as the review above reports. The important point is that it will give you better colours!!!
All the other minor advantages add up to a lens youwill always be happy to use.
Avoid 'other' manufacturers lenses like the plague - NONE of them have the ultrasonic motor and they are all just 'me too' products produced in inferior factories.
Retailers stock them for two reasons - and they are both BAD!
1. The distributors buy big ads in the photo mags thereby creating 'interest'
2. Much larger profit margins than OE lenses..
Good luck in your search and be sure to let us know what you eventually decide on...
Cheers

