SLR, or Single-Lens Reflex, is a type of camera that uses a mirror and prism system to allow photographers to see exactly what the lens sees. When you look through the viewfinder, you are seeing the image that will be captured, which helps in composing shots accurately. SLR cameras are popular among both amateur and professional photographers for their versatility and image quality. The term SLR can also refer to Statutory Liquidity Ratio, a financial term used in banking. It represents the minimum percentage of a bank's net demand and time liabilities that must be maintained in the form of liquid cash, gold, or other securities. This ratio helps ensure that banks remain solvent and can meet their obligations to depositors.