MGR Production introduced new adjustable viewfinder magnifier. These are the modified version of the original adjustable viewfinder magnifier (they have different range of magnification and design from the original version). The type Y has a magnification range from 1.15x to 1.65x or equal to -150 to +350 diopter, whereas the Type J magnifier has a magnification range from 1x to 1.5x or equal to -250 to +250 diopter.
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