1. A method in a camera including a lens device having an adjustable iris opening, comprising: adjusting a size of the iris opening between a first opening position and a second opening position; recording a plurality of images during said adjusting; analyzing said images, said analyzing including: determining high frequency content in said recorded images, determining a high frequency value for each of said recorded images based on said determined high frequency content, and determining information representative of the size of the iris opening corresponding to a recorded image with a specific high frequency value; and based on said analysis, determining an iris opening, that obtains a high quality image.