Originally posted by max_pyne my girlfriend owns the 35 ldt macro and its a crazy good lens. roughly the same price (used) as the two 35 & 50 together... but it's worth it!
I would have to caution against this in the first instance.
While I own the 35 Macro and everything Max says about it is true, you have to consider the economics. Unless you really
need the macro capability for your paid employment, or are very, very enthusiastic about macro photography already and feel that the "macro zoom" option on an existing lens isn't good enough any more, IMO the extra cost does not justify the added capability for the average user, especially one on a budget or who is coughing up a big chunk of money on a camera and high-performance kit zoom at the same time.
Better to try and bundle one or both of the 35/2.4 and/or 50/1.8 with your body/lens package and save up for the macro lens after a year or so IF you find a significant proportion of your work is very close-up and very wide-field.
If you
do develop a hankering for macro and find yourself mostly going after things that can jump or fly and sting, you're better off with a longer focal length, in which case the 50 or 100mm macro may suit you better - and the 100 being WR may be the best option of all for hunting the squishy slimy things that inhabit wet places.
Could the 35 Macro be the poor man's FA31? There are people out there who DO think so, and I wouldn't think to call them wrong, but my money's on a combination of the 35 and 50 non-limited as being the better deal for the general user. On the other hand, if you've got the money and want to spend it, I won't stand in your way.