Hi all. Having some trouble working out how to correctly use a light meter in a particular situation. I wont go into the particulars, but I sometimes have to shoot a subject through glass which has a dark tint to it. In normal situations in a studio, I can use a light meter to determine the correct SS/A/ISO to use. In this situation, the camera is behind the glass, but the strobe is not. I cant use a light meter as the meter will not account for the fact that the camera is behind the glass - let's just assume the glass is an ND filter with a unknown stop value and varies from glass to glass Can anybody think of a way I can use a light meter in this scenario? Maybe I could work out the stop value of the glass (nd filter) and adjust accordingly? If so, how would I determine the value of the glass?