Hi everyone,
i have searched on google about what is stop down 2 fstop. But too chim to understand.
for example, my 50mm lens f1.8.
2 stop down from f1.8, what is the fstop ? I seen the formula but very complicated.
anyone have a simple way to calculate ?
i have searched on google about what is stop down 2 fstop. But too chim to understand.
for example, my 50mm lens f1.8.
2 stop down from f1.8, what is the fstop ? I seen the formula but very complicated.
anyone have a simple way to calculate ?