As a newbie to the SLR world, I have a question regarding low light focus accuracy.
This was shot with a 30D and the 24-70L. This was on center auto focus at "24-70" numbers on the box, MLU, and 2 second countdown on a tripod.
The issue here is when I turned on two more lamps on near the box about 2 feet front-right of the box, the focus accuracy is dead on. Without the "helper" lights, it back focuses as evidenced by the number "50" which is 2 feet behind the box in the pic attached.
Regardless if the "helper" lights are on or off, the camera does not hunt for focus. It locks on instantaneously.
I have dones the battery and focus test charts and they are all dead on but done with decent lighting.
Is this normal? Any comments?