Professional cameras are great to have if you can afford them; they are rather expensive. These cameras are based on the SLR design a features resolutions that reach up to 12 million pixels. These cameras usually costs around $1500 to $8000.
These cameras provide a load of features like flexibility in carry it around, a wider range of lens, much better image quality, ruggedness so it last longer, and even metering options.
Most professional photographers use the digital single-lens reflex (DSLR) type camera because they have a removable lenses and the image composition is done through the viewfinder. The image goes through a mirror-reflected image that is identical to the single-lens reflex system that is used in film cameras.