Yes, the blurred backgrounds (shallow depth of field) with sharp subjects! And next thing that comes to our mind is how to get (achieve) it?
The answer is a DSLR and a wide aperture lens. There are plenty of options in market for both DSLRs and Lenses with wide apertures, but today we are here to talk about the 50mm f1.8 prime lens.
The focal length of this lens is fixed at 50mm. Sitting at the middle of spectrum , 50mm focal length makes it kind of versatile to shoot all kind of scenes. However this lens is best for capturing portraits.
The wide aperture also provides amazing bokeh making the shots very graceful. This lens does not have an image stabilisation. With the combo of wide aperture and a focal length of 50 mm, image stabilisation is more of a desirable feature rather than basic requirement. Personally I do not use image stabilisation until I am going for long focal lengths above 100mm. The 35 mm equivalent of human eye is 50mm on full crop sensors. Hence to actually convey what we see in our daily life, the 50mm lens is all we need.
However the chromatic aberration reduces with closing the aperture (increasing f stop to 3.5). Distortion is very low in this lens and can be easily dealt with in post processing by using image editing softwares.
Of course, the results also may not be of professional grade, but it is a good work around to gather experience of macro photography without having to spend on a macro lens.
There is the predecessor of this lens in the market now referred as 50mm f1.8 STM which is further refined for better quality pictures (7 aperture blades, lens coatings etc.). One can get it easily online.
The 50mm f1.8 is the first lens to buy after gaining experience from the kit lens.