PIX 2015

Digital ND Filter?

Started Jun 8, 2014 | Discussions thread
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Allan Olesen
Senior MemberPosts: 3,356
Re: Digital ND Filter?
In reply to studioduplateau, Jun 9, 2014

studioduplateau wrote:

A few cameras have ISO 50 done in the image processor, which is equivalent to the idea of digital ND Filter.

They do it by cutting highlight headroom. So this is a really bad ND filter. If your highlights clip at ISO 100, the same aperture and shutter speed will also make them clip at a fake ISO 50 with one stop of highlight headroom removed.

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