Leica 11645 manual Aperture Stop

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LEICA SUMMARIT-M 75 mm f/2.5

3

 

 

MTF graphs

100[%]

 

Aperture Stop 2.5

 

 

 

 

 

80

 

 

 

 

60

 

 

 

 

40

 

 

 

 

20

 

 

 

 

0

 

 

 

 

0

5

10

15

20

 

 

 

Y' [mm] =

21.0000

100[%]

 

Aperture Stop 4.0

 

 

 

 

 

80

 

 

 

 

60

 

 

 

 

40

 

 

 

 

20

 

 

 

 

0

 

 

 

 

0

5

10

15

20

 

 

 

Y' [mm] =

21.0000

100[%]

 

Aperture Stop 5.6

 

 

 

 

 

80

 

 

 

 

60

 

 

 

 

40

 

 

 

 

20

 

 

 

 

0

 

 

 

 

0

5

10

15

20

 

 

 

Y' [mm] =

21.0000

The MTF is indicated both at full aperture and at f/5.6 at long taking distances (infinity). Shown is the contrast in percentage for 5, 10, 20 and 40 lp/mm accross the height of the 35 mm film format, for tangential (dotted line) and sagittal (solid line) structures, in white light. The 5 and 10 lp/mm will give an indication regarding the contrast ratio for large object structures.The

20 and 40 lp/mm records the resolution of finer and finest object structures.

sagittal structures

_ _ _ _ _ _ _ _ tangential structures

Image 3
Contents Leica SUMMARIT-M 75 mm f/2.5 Technical Data Aperture Stop Effective Distortion Ymm Depth of field table Aperture Stop Distance Setting m Leica SUMMARIT-M 75 mm f/2.5