High ISOs, noise and quality

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Trevor Carpenter
Trevor Carpenter Forum Pro • Posts: 17,575
High ISOs, noise and quality
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When comparing ISO capability, reviewers and most people always seem to talk about noise levels.  Am I alone in thinking that noise isn't the issue.  I can deal with and even accept noise levels.  As far as I am concerned the high iso issue is all about image degradation.  I'm just looking at some ISO3200 pics I took with my G9 and they are pretty much write offs but definitely because of the noise.  Also when comparing iso performance doesn't there need to be a standard light comparison.  I tend to use highish isos in less than perfect daylight and only rarely at night but  many comparisons I see are in dark locations.

I feel there should be a standard methodology for comparing isos but at the moment it just seems to be the gut feel of the individual and in many different light scenarios.

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Recent and not so recent pictures here https://trevorc28a.wixsite.com/trevspics
and 2021 birds here https://photos.app.goo.gl/61f38oB1EYAAYAqE7

 Trevor Carpenter's gear list:Trevor Carpenter's gear list
Panasonic G85 Panasonic Lumix DC-G9 Olympus M.Zuiko Digital ED 60mm F2.8 Macro Panasonic Lumix G Vario 14-140mm F3.5-5.6 O.I.S Panasonic Leica 100-400mm F4.0-6.3 ASPH
Panasonic Lumix DC-G9
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