> Has anyone used/knows a camera similar to the NoIR V2 but without the Bayer filter?
I cannot help with that.
> This is for a low light application and I do not care about the colour so having no IR filter and no Bayer filter would help a lot.
The best you can do with a Raspberry camera is to take only bottom left green pixels of an image:
Both green pixels are brighter than red or blue pixels, and bottom left green pixel is brighter than top right.
So with v2 camera you have to take any mode without binning (1-3), see v2 table:
https://www.raspberrypi.org/documentati ... /camera.md
And then in post processing you have to just take bottom left pixels of 2x2 sub images.
You cannot get this done by v2 camera itself since you only have choice of odd row/column increments 1 and 3.
I used this technique for automatic caterpillar robot camera tilt calibration, did conversion of all green images to b&w based on a threshhold:
If you would use a v1 camera you can get your bottom left green picture directly from camera with horizontal and vertical 22 increments. That halves the resolution as well compared to 11 increments, but no post processing is needed.
You can do this 22 increments with either raspiraw (-vinc and -hinc options), or with raspivid from my userland fork
since that allows to inject I2C commands after GPU has initialized camera, very early in recording. This has the advantage that you will get full GPU processing (of bright green image).
You can do interesting stuff with that (raspivid) userland fork besides 22 increments horizontally and vertically, like changing shutter speed for every single frame of a video: