I'm a novice photographer looking for some advice on new gear. I have a 400D (bought with a twin lens kit), and an EF 24-105mm (which is the lens I usually use). I mostly take photos of my family (kids mainly), and whatever else I come across at the parks, lakes, and beaches we visit on weekends/holidays.
I am looking to buy a portrait lens, and am presently tossing up between the Canon 50mm 1.4 or Sigma 50mm 1.4. I'm leaning towards the Sigma as it has a larger filter size - but would appreciate some advice. It's really just to get some great portrait shots of my kids (and any other kids I take a pic of).
I'm also looking to buy a off-camera flash. I have only ever used my built-in flash, but the tax man was nice to me this year, so thought it's time to splash out. At the moment I'm looking at the Canon 580 EX II or the Sigma 530 Super. As I said, I never used an off-camera flash, so don't know anything about these. Again - any advice appreciated.
Of course - if there are other options that you would recommend, add these to the mix. Budget is an issue (of course) but the prices of the options I am currently looking at are OK.