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
The Scarlet Flower called for the daughters and asked what gifts should he bring them. The eldest asked for a golden tiara adorned with precious gems that sparkled brightly, and the second wanted a crystal mirror which always showed the person's reflection as young and beautiful. The merchant knew these would be difficult to obtain, but within his means. The youngest, named Nastenka (a diminutive form of the given name Anastasia), asked for the most beautiful scarlet flower in the world, which she had seen in a dream. The merchant did not know where he could find such a flower, but promised not