Mr. Aloke Dasgupta is a veteran cinematographer also known as "Dada" to his colleagues. After a struggle of two years in Bombay, Chalti ka naam Gaadi was his first break as an independent photographer which marked the start of a career in 1949. Chalti ka Naam Gaadi was an opportunity that allowed him to showcase his capabilities and he utilized that opportunity well. After the release of the movie, he got a lot of offers working on two - three movies at any given time.
You don't get to be Shakti Samant's photographer of choice unless you are extremely talented and he proved his talent when he shot the song "Roop tera Mastana" for Aradhana in just one shot. If you have not noticed it so far, check out the song again, this whole song is just one shot.