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
As Far as the Eye Can See actor Joaquin Phoenix. In 2008, the track "Light for the Deadvine" was featured in the penultimate scene of "Wilson's Heart", the season finale of the fourth season of the Fox medical drama series "House". Live keyboard player Ian Russell did not actually feature on As Far As The Eye Can See; he is not credited on the album's liner notes, and all keyboard parts on the album were played by Jones, Roberts and Williams. As Far as the Eye Can See As Far as the Eye Can See is the debut album of Welsh alternative rock band People in Planes