question: What variables help the photographer produce the desired effect ?
answer: lighting , film speed , f-number ( aperture size ) , and shutter speed ( exposure time )
turker_answer: lighting , film speed , f-number ( aperture size ) , and shutter speed ( exposure time ) is the variables that help the photographer produce the desired effect .
rule-based: Lighting , film speed , f-number ( aperture size ) , and shutter speed ( exposure time help the photographer produce the desired effect .