Micro-honeycomb lens

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In photography, micro-honeycomb lenses are a technique developed by the Minolta company in the 1970s for very bright focusing screens in single-lens reflex cameras .

Conventional, etched focusing screens of single lens reflex cameras have a more or less roughened surface, which strongly scatters the incident light and therefore darkens the viewfinder image. The reflex viewfinder equipped with micro-honeycomb lenses, on the other hand, only works with very little light loss. The readability of the image sharpness can deteriorate because light from the central area of ​​the beam path is amplified so that image blurring caused by edge rays cannot be seen on the focusing screen. In the case of critical subjects, interference effects can occur with these focusing screens due to the regular structure, the viewfinder image then appears to flicker or shows color fringes.