Hi, yes you can change your stream if photography is your field of interest plus candidates from any field are eligible to opt for a higher degree in photography.
In masters degree, you'll be taught ways in which you can hone your creative skills bland refine your expertise in the field by making you proficient in technology, aesthetics, composition and technique. Photographers with notable skill sets and talents are needed all around the world in many ways, especially those who recognized their field of expertise and have a broad base of advanced knowledge. After completing post graduation a multitude of career options open up for you. You can work as an instructor or become an artist exhibiting your talents and specialities. You can work in commercial, Industrial, entertainment or media Industry. Career in photography is one of the best options to have emerged in India with industries providing lucrative employment and salaries to offer. Some of the best photography colleges are concentrated in Maharashtra:

• Institute of mass communication, Manipal
  
• International institute of mass media, New Delhi
  
• Sri Aurobindo institute of mass communication, New Delhi
  
• Asian academy of film and television, Noida
  
• Film and television institute of India, Pune
  
• University of Delhi
  
• YMCA center of Mass media
  

These colleges mentioned offer Diploma and certificate courses in photography.
You can also check for the following colleges that offer M.F.A(photography)

• Annapurna international School of film and media, Hyderabad
• IIP academy, Noida
• JNAFAU, Telangana

Some of the top colleges in photography are:

• Delhi college of photography
  
• Sir J.J. institute of applied arts, Mumbai
  
• Light and life academy, Ooty
  
• The one school Goa
  
• National institute of photography, Mumbai
  
• Jawaharlal Nehru architecture and fine arts institute, Hyderabad

In order to become a photographer or make your career in photography, one must have both creative and technical skill sets and knowledge like visual skills, originality, creative, artistic bend of mind, Independent etc.

Some popular role models in this field are:

• Iqbal Ahmed
  
• Bandi Rajan Babu
  
• Kulwant Roy
  
• Raghu Rai
  
• Raghubir Singh Khatu
  

Different career prospects in photography are:

• Freelancer photographer
• Advertising photographer
• Photojournalists/ press photographers
• Feature photographers
• Fashion photographers
• Portrait or wedding photographers

Good luck with your career ahead.