Nikon's odd financial calendar means that the camera maker is announcing its first quarter results for 2013. The oddly-dated documents show that it isn't having the best Spring / Summer, since while it pulled in a net profit of $201 million, that figure is down nearly 50 percent on the $392 million it made in the same period last year. It sold a record number of interchangeable-lens cameras, lenses and a good number of compact cameras, but that was offset against the high cost of the Yen. Its other businesses, Precision Equipment and Instruments both suffered thanks to Gove