The whole song expresses the love and devotion to photography, and observes and captures all kinds of beautiful moments in life through photography. "Grasping the concentration of life" here can be understood as grasping and feeling the richness and depth of life and experiencing the happiness and beauty of life through photography or other means.
Specifically, the word "life concentration" can be understood as the quality and quantity of wonderful moments and happiness in life. When we seriously feel and capture every beautiful moment in life, we will cherish life more, be more grateful for life, and make our life more meaningful and fulfilling. Therefore, "grasping the strength of life" expresses a positive attitude towards life, a love and respect for life.