Canon LTM using canonlite d on other cameras

[Michael I.]

I know the guide number for 100 iso is 16(in meters)what is it for 50,400?

 

[djon]

For half 100 it's half 16 (divide by two). 400 is two stops faster than 100...and a stop is 2X, so your GN is four times sixteen with 400 film.