I rented a sigma 24-70 for a trip to Disneyland and is is MUCH heavier than I thought it would be. I'm in a bit of a panic knowing we leave tomorrow and I'm not sure what to do with this. I have a good strap but the case that came with my pentax k30 will be pretty much useless I think. So whatever advice you all can offer will be very appreciated. Even if all you have to say is, "suck it up."