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Message: <blockquote data-quote="Stoshowicz" data-source="post: 535118" data-attributes="member: 31397">Thanks for the response , I agree heartily about the need for speed with BIFs , I can shoot big slow stuff at 1600th of a sec but for the little peeps , it helps to double that ,, EASILY. I almost never use auto ISO unless the target is a landscape , I prefer to estimate the right ISO beforehand.  The issue being , that if a black bird on a light sky is coming towards or away from me , auto iso will be continually adjusting to get a neutral gray median value , and so as that bird fills more or less of the frame , the ISO will be shifting to achieve that average, regardless of how I want the image to come out. Yes a tiny metering circle 6mm may expose correctly for the bird , but that too will depend on exactly what value that portion of the bird has at its given orientation and wing alignment etc .  So though I respect that everyone has their own methodologies , and we sink or swim accordingly,, I prefer to ballpark for the sky and vegetation ,, and the bird is illuminated to whatever value it is that the light hitting it is.  When I occasionally do use the auto ISO, its only in soft light and I put the exposure compensation at about +1 or so.  Anyway , if you are liking the noise levels at 6400, thats really pretty good in my opinion. (RE: using what you need ,IMO  one needs to use the lowest ISO that will still overexpose by one or two stops without blowing the highlights -If they take a raw image, I'm thinking folks are often too stingey about using higher ISO numbers, to get the most out of the camera, but , thats just me - and I dont shoot much landscape so my approach may not be standard )</blockquote>

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