Thanks for the comments on here, dejayM, and on the individual observation, which I have seen as well.
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I have been very much point and click and hope for the best. The photos you see here are, of course, significantly better than those I discard. I use the auto settings, even when I shift to Microscope mode. I have difficulties with Focus Stacking, because of either hand shake or a breeze - in about 25% of attempts it fails.
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The manual says available ISO values range from 100 to 12,800. I’m not sure what the ISO Auto value is but that’ll be what I am using. I’ll look into how to alter it.
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I’ve struggled recently with various things, including getting the camera to see and focus on what I’m seeing and want to photograph (an insignificant plant, for example), and avoiding over-exposure in bright sunlit conditions.
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But it’s still been fantastic for my purposes, which aren’t artistic - I’m only looking for record shots, or more properly for identification shots - hoping that I’ll be able to see and examine features at home that my eyesight doesn’t permit in nature.