Yesterday I went out to experiment more with shutter speeds, shooting down by the river, and I found that I needed to change the ISO to get better results. I wanted to shoot the water flowing over some rocks. I found that I had a reasonable result with the shutter speed at 1/1500th - but there was a big difference between the results before and after changing the ISO.
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first try, shutter speed 1/500th, ISO 100
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This was of course too dark. So I changed the ISO to 800.
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| 2nd try, shutter speed 1/500th, ISO 800 |
Better, but still a bit dim. So the ISO went to 1600.
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| 3rd try, shutter speed 1/500th, ISO 1600 |
That gave me an image true to the early evening light at the time.
I did go on to increase the shutter speed to 1,000 and 2,000, but that is another story.
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