The 80-20 enlarges and redirects 20% of the light at a 90? angle from the flash and allows 80% of the light to pass on, to be redirected by another surface -- most likely a ceiling. The remaining 20% is redirected forward toward the subject to fill the shadows cast by the ceiling bounce. The 80-20 enlarges and redirects 20% of the light at a 90? angle from the flash and allows 80% of the light to pass on, to be redirected by another surface -- most likely a ceiling. The remaining 20% is redirected forward toward the subject to fill the shadows cast by the ceiling bounce.
