The +2 diopters of this close-up lens focus at a distance of 0.5 m (1 5/8 feet) with the lens focused at infinity. For the normal lens it is a stepless extension of its close-up range up to approximately 1:4.5. On short to medium telephoto lenses it extends the NL 1 close-up range seamlessly (with an 85 mm lens to appr. 1:3.5 and with a 135 mm lens to appr. 1:2.5).