So my Sigma 40mm 1.4 is lovely. I really do love it. It's awesome in the daylight, even at 1.4 all the way up to wherever I wish to use it..
But it seems that at night, it doesn't like focusing on what I want it to. It'll wander around, grabbing what seems to be random things and choosing to focus on them by it's own volition. Has anyone experienced this? How can I accurately test what this thing is doing?
I've calibrated it using that 45 degree test chart at 1.4, but I think that might be throwing things off. I didn't know that was possible.
But it seems that at night, it doesn't like focusing on what I want it to. It'll wander around, grabbing what seems to be random things and choosing to focus on them by it's own volition. Has anyone experienced this? How can I accurately test what this thing is doing?
I've calibrated it using that 45 degree test chart at 1.4, but I think that might be throwing things off. I didn't know that was possible.