froyd
Veteran
To see the EV in the window, you'll have to move the dial. The hack will skip that process. Push the button, and the needle will point at the EV right there and then.
I don't always use a light meter, but when I do, I use 208. (tho I don't have that mod)
What he said.
When I go out with my meterless cameras, I take two readings: in the light and in the shade. Without turning the dial at all can see if the difference is 2 -3 (most commonly) - 4 stops apart. If the light changes or I'm in an in-between situation, I can take a reading and the needle will tell me how many stops up or down to adjust. No need to touch the green arrow.