Zac, your camera should do fine in lower light but it's not just the camera, but the film stock as well. My concern about the camera you have is the lack of 24fps. The 814 XLS, 814 AZ and 814 AZ Electronic do shoot 24fps. All of them have a fast aperture of f/1.4 and I think yours has both 220° and 150° shutter angles. Use 220° in low light if you need it keeping in mind you will have more motion blur. Also, use 200T or 250D film stocks in low light if you don't mind the extra grain.