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Forum: Photographic Technique 05-13-2019, 02:00 PM  
ND filter or Stacked interval Composite
Posted By photoptimist
Replies: 18
Views: 1,061
Nice comparison!

Both do a decent job.

Interestingly, the ND filter (image #1) makes the falls a bit too smooth and leaves the river a bit too rough for my taste. Maybe a longer shutter time would have helped but that can be a challenge.

The interval-composite shot (image #2) leaves some nice texture in the falls and blurs the river better but it suffers from stuttered ghost patterns in the river where patches of floating foam were captured at 3 second intervals. Maybe a longer interval time would have helped but that can be a challenge.

Regardless of the approach, good long duration shots often require a a bit of trial and error to balance the under-blurring and over-blurring effects in different parts of the image.
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