Thanks for the info everyone.
Code, I know it isn't technically a macro lens as it isn't 1:1. However, as I stated, I was hoping for a decent compromise lens and the macro/close focus was a bonus.
The low light part was the more important consideration of the two.
Groucho, the more I looked online, the more average reviews I found about the lens. The recent Sigma price hikes aren't helping. Seems nothing to get excited about.
Will the 50mm 1.4 really limit my field of view to the point of being annoying?
My primary goal for the lens at Disney is for night time parade shots and indoor ride shots and outside the World, I would like to be able to get indoor pictures without the use of a flash. Will the 50 be able to fill the bill? The 31mm Pentax would be nice, but not in the budget at the moment.
Thanks for any advice.