Leica 11626 manual Effective Distortion Ymm

LEICA TRI-ELMAR-M 16-18-21 mm f/4 ASPH. 7

21 mm

100[%]		Aperture Stop 4.0			100[%]			Vignetting
80					80						8.0
											5.6
											4.0
60					60
40					40
20					20
0					0
0	5	10	15	20	0		5	10		15	20
				Y'[mm]							Y'[mm]
100[%]		Aperture Stop 5.6			5[%]		Relative Distortion
					4
80					3
					2
60					1
					0
40					-1
					-2
20					-3
					-4
0					-5
0	5	10	15	20	0		5	10		15	20
				Y'[mm]							Y'[mm]
100[%]		Aperture Stop 8.0					Effective Distortion
					Y'[mm]
80
					12
60					9
40					6
20					3
0					0
0	5	10	15	20	0	3	6	9	12	15	18
				Y'[mm]							X'[mm]