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You are here: Home / The Last Word / Nikon D4 dark-field images

Nikon D4 dark-field images

November 3, 2014 JimK Leave a Comment

These are samples from the images used to create the curves in the previous post.

ISO 100, no filtering:

 

Nikon D4, ISO 100, no filtering
Nikon D4, ISO 100, no filtering

With 25 pixel kernels:

Nikon D4, ISO 100, 25 pixel horizontal averaging kernel
Nikon D4, ISO 100, 25 pixel horizontal averaging kernel
Nikon D4, ISO 100, 25 pixel vertical averaging kernel
Nikon D4, ISO 100, 25 pixel vertical averaging kernel
Nikon D4, ISO 100, 25 pixel square averaging kernel
Nikon D4, ISO 100, 25 pixel square averaging kernel

With 152-pixel kernels:

Nikon D4, ISO 100, 152 pixel horizontal averaging kernel
Nikon D4, ISO 100, 152 pixel horizontal averaging kernel
Nikon D4, ISO 100, 152 pixel vertical averaging kernel
Nikon D4, ISO 100, 152 pixel vertical averaging kernel
Nikon D4, ISO 100, 152 pixel square averaging kernel
Nikon D4, ISO 100, 152 pixel square averaging kernel

I don’t normally present the intermediate-ISO images, but I’m making an exception in this case for ISO 400, since it showed anomalous results in the curves of he preceding post.

With no filtering:

Nikon D4, ISO 400, no filtering
Nikon D4, ISO 400, no filtering

With 25-pixel kernels:

Nikon D4, ISO 400, 25 pixel horizontal averaging kernel
Nikon D4, ISO 400, 25 pixel horizontal averaging kernel
Nikon D4, ISO 400, 25 pixel vertical averaging kernel
Nikon D4, ISO 400, 25 pixel vertical averaging kernel
Nikon D4, ISO 400, 25 pixel square averaging kernel
Nikon D4, ISO 400, 25 pixel square averaging kernel

It’s pretty obvious that there’s some serious horizontal banding present.

With 152-pixel kernels:

Nikon D4, ISO 400, 152 pixel horizontal averaging kernel
Nikon D4, ISO 400, 152 pixel horizontal averaging kernel
Nikon D4, ISO 400, 152 pixel vertical averaging kernel
Nikon D4, ISO 400, 152 pixel vertical averaging kernel

 

Nikon D4, ISO 400, 152 pixel square averaging kernel
Nikon D4, ISO 400, 152 pixel square averaging kernel

Onward to ISO 6400. With no filtering:

 

Nikon D4, ISO 6400, no filtering
Nikon D4, ISO 6400, no filtering

With 25-pixel kernels:

Nikon D4, ISO 6400, 25 pixel horizontal averaging kernel
Nikon D4, ISO 6400, 25 pixel horizontal averaging kernel
Nikon D4, ISO 6400, 25 pixel vertical averaging kernel
Nikon D4, ISO 6400, 25 pixel vertical averaging kernel

 

Nikon D4, ISO 6400, 25 pixel square averaging kernel
Nikon D4, ISO 6400, 25 pixel square averaging kernel

With 152-pixel kernels:

Nikon D4, ISO 6400, 152 pixel horizontal averaging kernel
Nikon D4, ISO 6400, 152 pixel horizontal averaging kernel
Nikon D4, ISO 6400, 152 pixel vertical averaging kernel
Nikon D4, ISO 6400, 152 pixel vertical averaging kernel
Nikon D4, ISO 6400, 152 pixel square averaging kernel
Nikon D4, ISO 6400, 152 pixel square averaging kernel

 

 

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