| http://www.w3.org/ns/prov#value | - In the first embodiment described above, it is preferable to set the diffusing characteristic of the focal plane 8a of the reticle 8 taking into consideration a location of an exit pupil, characteristics such as vignetting of the photographic lens 1, refractive power of the condenser lens 5 or a location of an eye point, etc.
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