In consequence, the Nikon M was introduced in the autumn 1949. This model is recognised by the M preceding the body number. Nippon Kogaku had settled for an intermediate frame format of 24 × 34 mm, hoping to find acceptance on the export market. Why Nippon Kogaku was reluctant to go all the way to the widely accepted standard size, is not fully understood, the camera itself seems prepared to accommodate the full frame size for the vast majority of situations. In fact, a new improved model was planned, retaining the non-standard frame format.