| − | In [[photography]], a '''filter''' is a thin transparency placed over the lens of an [[enlarger]] to accentuate some colors in the process, while suppressing others. Filters can be used to give black and white photos a red tint, or accentuate [[contrast]]. | + | In [[photography]], a '''filter''' is a thin transparency placed over the lens of an enlarger to accentuate some colors in the process, while suppressing others. Filters can be used to give black and white photos a red tint, or accentuate [[contrast]]. |