Actually, the you could have just gotten a resale 24 f2.8, don't really need the L version. Landscape most of the time is done at day time, f1.4 is not needed for me. In terms of sharpness, it almost matches the L version. If you buy 24 f2.8 + 50 f1.4 off B&S, it should only cost you less than $800. Remaining money still can buy flash, if you compare it to the 17-55 price.