Nikon Micro-Nikkor 200mm f/4 IF instruction manual

Without T T L Metering

At close ranges (reproduction ratios greater than 1:10), the amount of light reaching the film decreases as the extension between the lens and film plane increases. When non-TTL measurement is used for this range, the result is underexposed photographs unless compensation has been made for this decrease. The table at the right gives the exposure factors (com- pensation values) with exposure increase in f/stop for non-TTL measurement at reproduction ratios greater than 1:10. The table at the right is for use when various extension equipment is attached*.

To calculate the necessary correction in shutter speed rather than in aperture value, multiply a given ex- posure factor by the exposure time. For instance, if the normal exposure at a 1:4 reproduction ratio is 1/8 second, the correct shutter speed is 1/8 x 2 = 1/4 second.

*When you use the lens by itself or attach a teleconverter, such as the TC-301, exposure compensation is not necessary.

Reproduction ratio

1/10

1/8

1/7

1/6

1/5

1/4

1/3

1/2

1/1.8

1/1.6

1/1.4

1/1.2

1/1

1.2

1.4

1.6

1.8

2

Exposure

Exposure increase

factor in f/stops

1.41/2

1.51/2

1.52/3

1.62/3

1.81

2.01

2.51-1/3

3.41-2/3

3.82

4.32

4.92-1/3

5.82-1/2

7.33

9.23-1/3

1 1.4 3-1/2

13.83-2/3

165	4
I 19.4	4-1/3