I do have some knowledge already so experts only!
The question is will I achieve better resolution by taking the B&W photo with the option switched on in the camera at the shot time? Technically it's feasible that it would because the individual RGB sensors could operate in a brightness only...
First I've heard of it.
To add to the kidney stone hint above, a ring is also another term for a a**hole, the (kidney) stone passes through the ring... ???
