I believe this camera is light hungry .
The HMC-150 has the best or close to the best sensitivity and lowest noise in the 1/3" class.
I still havent gotten it " Canon XHA1 clean " .
My HMC-150s have better low light sensitivity and less noise than my A1s did. I did a lot of side by side shooting with the two before my return period was up on the HMC-150, or I would have not kept it.
The A1 has a different looking noise to me and is more noticeable. My A1s also had very mild noise even on 0 db gain.
I have just been editing a wedding I shot back in October using the A1 (now gone) and HMC-150. They do have very different looks to them, even when matched as best I could before the shoot. The A1 seems to have a warmer look that using the Vegas color corrector, does not go away. In comparison, the HMC-150 has a much cooler look, although not trending blue. I think the HMC-150 colors are easier to correct in post for sure. Im not sure why this would be though.
When applying sharpening in post, the A1 takes it better and it comes out better than the HMC-150. There is no doubt the A1 is capable of good sharp images.
Bottom line, different cameras, each with its strong points, both very good.