1. A method comprising: exposing a projected image on an image sensor of an imaging system during at least part of an exposure period for attaining at least two exposures; sensing movement of the imaging system, during the exposure period, in order to determine an amount of movement of the imaging system relative to an initial position of the imaging system in the exposure period; and constructing an image based on at least a first exposure and a second exposure, wherein the first exposure is attained during a first time period, within the exposure period, in which the determined amount of movement of the imaging system is within a predetermined movement range relative to the initial position of the imaging system, the second exposure is attained during a second time period, within the exposure period, in which the determined amount of movement of the imaging system is within the predetermined movement range relative to the initial position of the imaging system, and between the first time period and the second time period there is a third time period in which the determined amount of movement of the imaging system is outside the predetermined movement range relative to the initial position of the imaging system.