« on: April 06, 2013, 09:54:13 AM »
Before MK III:I dunno....I was asking because in the past, I wasn't too concerned about ISO going a little high, and I noticed my videos were plagued with noise, especially in the dark/black areas.
For the best noise performance shot at 160.
For the best latitude shot at 100 with just a very little more noise. You may notice it if you shoot at very low light.
In emergency cases shot at 320 or 640 but you will cope with some noise.
With the MK III go up to 3200 without worries
That's because you need at least a little bit of light, "shoots well in low-light" doesn't mean "shoots well in no light." Adding even a minimal amount of light will reduce the noise even at the same ISO.
+1 The only reason why you'd ever need really ridiculously high ISO is so you can stop the aperture down a bit, I think for 99% of situations that matter, you won't need to record video past ISO2500 with an f2.8 lens or brighter. Most wedding receptions with a decent lighting setup by the venue I usually shoot candids from the crowd at about ISO1250 anyway. However, there was this one time at a bar where I cranked my 5D mark III up to ISO 20,000 to expose my drunk friend (expose, in camera terms, lol)....Even then, the grain isn't all that bad if you compare it to most other cameras and normally, people won't really care as long you can still see a fair amount of detail in the image.