Diaphragm (optics) curved blades improve the roundness of the iris opening. In a photograph, the number of blades that the iris diaphragm has can be guessed by counting the number of diffraction spikes converging from a light source or bright reflection. For an odd number of blades, there are twice as many spikes as there are blades. In case of an even number of blades, the two spikes per blade will overlap each other, so the number of spikes visible will be the number of blades in the diaphragm used. This is most apparent in pictures taken in the dark with small
Flower Flower group attended festivals such as Join Alive, Rock in Japan Festival and Countdown Japan. In May 2014, the band released their second song, "Kamisama". In June, it was announced that Flower Flower would perform the four theme songs for the live-action adaptation of Daisuke Igarashi's manga "Little Forest", released in two parts in August 2014 and February 2015. Flower Flower performs the theme songs for each season, with summer and autumn released in 2014 and winter and spring in 2015. The name Flower Flower was picked as Yui wanted something natural in their band name. Flower Flower Vocalist Yui is