Originally posted by brian13 there is much difference between 43 and 40?
worth the money difference
Erm... Yes.... there are differences between the 2... If you are asking on sharpness, i'd say both are as sharp enough for anyone.
Difference mainly i see is their "character"... **40 seems to be designed to be "flat field" sharp from the get go whereas the 43 is not so; centrally sharp and then gradually falls off as it goes to the corner, this doesn't apply for all f stops.**
I guess that's why the 43 (higher central sharpness) is more suited for portrait and the 40 is more general purpose and perhaps landscape?
Money difference, i don't know.. But perhaps you can start by giving consideration to the kind of "character" you would want..
** Of coz stopping down to f/8 would render the sharpness more or less the same, unless you only appreciate photos that are viewed only at 100% magnification.