Using monochrome on DSLR vs dedicated astro mono camera

[rohanpai]

Would taking photos using the monochrome setting in a DSLR and LRGB filters give the same outcome as using a dedicated astro mono camera and LRGB filters? 🤔

[wxsatuser]

No!

[The Lazy Astronomer]

No, because your DSLR sensor is still a colour sensor (i.e. the bayer matrix is still there). The monochrome effect is achieved through the cameras software.

[ollypenrice]

Another no. Every pixel on your DSLR chip has a colour filter in front of it which you cannot remove. These filters make up the Bayer Matrix mentioned above and, very roughly, each filter blocks two thirds of the light, so the red filter blocks blue and green, etc. When you convert to greyscale all you do is ignore the colour information but you cannot recover the blocked light.

Olly