I did’nt quite understand what you asked. SLR = Single Lens Reflex SLR cameras are hi quality professional cameras, they use single lens to capture image and to show preview in view finder (using prisms). For routine photography its best to go for normal digital cams as you can see the preview in the LCD screen. Also normal cams start from 8000 onwards.
SLR digital cams will cost a lot more Rs25K+