What is SLR camera (SLR definition -what is the Use-compare with other camera)?
Nikon D3100 14.2MP Digital SLR is a great camera. Check it out in the link below.
Source(s)
SLR; Single Lens Reflex.
A single-lens reflex (SLR) camera is a camera that typically uses a semi-automatic moving mirror system (hence the name "reflex", from the mirror's reflection) that permits the photographer to see exactly what will be captured by the film or digital imaging system, as opposed to pre-SLR cameras where the view through the viewfinder could be significantly different from what was captured on film.
Prior to the development of SLR, all cameras with viewfinders had two optical light paths: one path through the lens to the film, and another path positioned above (TLR or twin-lens reflex) or to the side (rangefinder). Because the viewfinder and the film lens can't share the same optical path, the viewing lens is aimed to intersect with the film lens at a fixed point somewhere in front of the camera. This is not problematic for pictures taken at a middle or longer distance, but parallax causes framing errors in close-up shots. Moreover, focusing the lens of a fast reflex camera when it is opened to wider apertures (such as in low light or while using low-speed film) is not easy.
So what are you trying to do? Ask for answers to an assignment or sell us the D3100?
A single-lens reflex (SLR) camera is a camera that typically uses a semi-automatic moving mirror system (hence the name "reflex", from the mirror's reflection) that permits the photographer to see exactly what will be captured by the film or digital imaging system, as opposed to pre-SLR cameras where the view through the viewfinder could be significantly different from what was captured on film.
Nikon D3100 VR Lens Kit
Rs. 29, 995
14.2 megapixel DX-format CMOS sensor
Other highlights
D3100
Image sensor cleaning (sensor shake)
11 AF points (with 3D tracking)
IS0 100-3200 range (12, 800 expanded)
HD movies (1080, 720p or WVGA)
AF-S DX 18-55mm VR f/3.5-5.6G
3x zoom lens covering the most frequently used focal range of 18 to 55mm
Vibration Reduction enables sharper pictures while shooting at shutter speeds up to three stops slower than would otherwise be possible
Hybrid aspherical lens element minimizes lens aberration
Nikon's exclusive Silent Wave Motor ensures fast, quiet autofocus operation.28 m/0.9 ft.closest focus distance throughout the entire zoom range
A good choice with good overall performance and is value for money product.
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