Nikon 1988 - 105mm f/2.8D AF Micro-Nikkor Lens Manual de instrucciones - Página 13

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Nikon 1988 - 105mm f/2.8D AF Micro-Nikkor Lens Manual de instrucciones

Without TTL metering

At close ranges (reproduction ratios greater than

1:10), the amount of light reaching the film de-

creases as the lens-to-film distance increases. When

non-TTL measurement is used in these cases, photo-

graphs will be underexposed unless you have com-

pensated for this decrease. (When the Micro-Nikkor

105mm f/2.8 lens is used with the Nikon/Nikkormat

or Photomic TTL meter, compensation is not neces-

sary since the meter will give accurate readings of the

amount of light reaching the film.)

The tables at the right give the exposure factors

(compensation values) with exposure increases in

f/stops for non-TTL exposure measurement at repro-

duction ratios greater than 1:10.

If you don't want to increase aperture compensation

more than one full f/stop, use slower shutter speeds.

For example, for a 1:1 reproduction ratio, use 2-

steps slower shutter speed and then open the lens by

2/3 stop, or use 3-steps slower shutter speed and

then stop the lens down by 1/3 stop.

Lens only

Reproduction

ratio

1/10

1/8

1/6

1/4

1/2

Exposure

factor

1.1

1.2

1.4

1.9

Exposure

increase

in f/stops

approx. 1/4

approx. 1/3

approx. 1/2

approx.1

With PN-11 ring

Reproduction

ratio

1/2

1/1.8

1/1.6

1/1.4

1/1.2

1/1

1/0.88

Exposure

factor

3.4

3.5

3.9

4.7

5.1

Exposure

increase

in f/stops

approx. 1-3/4

approx. 2

approx. 2-1/4

approx. 2-1/3