| http://www.w3.org/ns/prov#value | - SUMMARY OF THE INVENTION [0013] The present invention has been devised in view of the above and other drawbacks, and it is an object of the present invention to provide a small display optical system that can attain a display wide angle of view while using a small display device and is small as a whole and an image taking optical system that can attain a photographing wide angle of view with a sma
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