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Long Exposure Noise Reduction

ericbowles

Atlanta, US
10524 posts

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"RE: Long Exposure Noise Reduction"

ericbowles Moderator Awarded for his in-depth knowledge and high level skills in various areas, especially Landscape and Wildlife Photoghraphy Writer Ribbon awarded for for his article contributions to the community Donor Ribbon awarded for his very generous support to the Fundraising Campaign 2015 Nikonian since 25th Nov 2005
Fri 12-Jul-13 08:49 PM

Great comments here - right on target about the value of LENR.

I had the same experience with fireworks. I like an 8 second exposure timed with launch, and LENR caused me to miss some nice cycles of fireworks. LENR does not work when you need short duration between images.

Another place to be careful about LENR is with multiple exposure images. I often use multiple exposures in lieu of long exposures. For example, with moving water I might use a series of 5-7 two second exposures rather than one 30 second exposure. The time between exposures for LENR to work can reduce the smoothness of the multi-exposure image.

This also applies to interval imaging of any type when the exposure is more than 1 second.

Another place to avoid LENR is with star trails. There are two types of star images - short images to capture stars as dots (typically under 30 seconds using the 500 divided by focal length formula), and long star trails with an exposure of an hour or more. With the former, LENR is fine. But with star trails, you would have to wait an hour or more for the LENR black frame image. In some cases you might have 3 hour images - completely unacceptable for a second frame as battery life becomes an issue.



Eric Bowles
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This is a hot, active topic! Long Exposure Noise Reduction [View all] , helmdr , Tue 25-Jun-13 03:32 PM
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