Kase clip-in filter for Z6/Z7

[Nikfuson]

As an alternative to a filter in front of the lens, Kase (and other manufacturers) have developed filters that is placed in the mirrorless-box, between the rear of the lens and the sensor.
I was given a ND1000 (10-stop) filter from my dealer Stavanger Foto so I could try it out and report back.
Well, as weather permitted between the showers I popped out to the beach and did a quick first test.
I will come back with some more details on the filter itself later. Meanwhile, here are some test shots I'd like to share. Feel free to ask any questions you might have related to the filter.

[Erik Lund]

That is interesting news for especially wide angle lenses like the F mount via converter like the 14-24mm f/2.8

[golunvolo]

Yes, also for video. I'll love more information

[Birna Rørslett]

A detail shot ofthe filter and its placement wouldn't be amiss.

[Nikfuson]

Here is the filter:

[Nikfuson]

It is thin!

[Nikfuson]

Here mounted (a very simple process).
EDIT: This is put in the wrong way. See below for correct instructions.

[John Geerts]

Very interesting, thanks for the information and the images !

[golunvolo]

It looks like a smart idea, how does it work ?

[Nikfuson]

Here are a few more pics showing the installation.
The text on the filter goes in towards the sensor, i.e. it reads from the rear once installed.
Installation is at 45 degrees, attaching to the bottom first, then with a gentle push in at the top.
Removal is easily done with the supplied "guitar pick", simply put the pick in the groove at the top and pop it out.

[Nikfuson]

Here a test with the Z Nikkor 14-30/4S at f/5.6 without and with the filter. As this is not a controlled studio lit setting there is a slight variation in the ambient lighting between the two shots.
Using ACR I set the white balance off the black dot just to the right of the nearest flower pot. Then I read the RGB values at 3 spots around the black dots, one in the centre and the other in the extreme upper right corner. To me there is no added vignetting from the filter.