Above you see the final results after correcting an image that I took at Zion National Park with a really high ISO of 25600 which is way too high. Having a high ISO can lead to the photo being blown out and not being as clear compared to a lower ISO shot. If I had to take this photo again I would use a lower ISO like 3200 and would have used a spotlight to quickly highlight the canyon in front. Going back and tying to edit photos that you screwed up on in the past makes you appreciate what you have learned and helps you understand ways to limit the amount of edit time needed in the future.
Here is the original photo that is all blown out and in need of some major work!
EOS 6D
25 Second Exposure ------------------------------ 25-30 Seconds would be fine
ISO 25600 ----------------------------- Better to use 3200
Thanks for reading
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