This wide-angle conversion lens covers a maximum field angle equivalent to approx. 19.3mm (35mm film camera equivalent) when used with the DX-1200HD. (The lens can be used on land as well as underwater.) *The lens can be used on land, but slight vignetting (dimming) may occur in the four corners of the image. Slightly zoom in to telephoto to eliminate vignetting. *When the wide-angle conversion lens is attached, its shadow can appear on the picture if the built-in flash is used. Using an external strobe together with the built-in flash is recommended.