Pentax 40 MZ-3i operating instructions Special functions, Pull-out/push-in wide-angle diffuser

13. The zoom reflector	Wide angle diffuser
Pull-out/push-in wide-angle diffuser

Pull out the wide-angle diffuser under the main reflector, all the way to the

front. Then release it. This causes the main reflector to automatically advance to zoom position 20 mm. The wide-angle diffuser automatically folds up, and the distances and zoom value on the LC display are modified accordingly.

To push in the wide-angle diffuser, press on the left and right-hand guide rails of the black guide plate. The wide-angle diffuser will fold down and can then be pushed in completely.

14. Special functions Exposure o.k.

Fig. 26: Exposure o.k.
The correct exposure indicator („o.k.“)	lights up only when the frame will be,

or was, correctly exposed in the auto and TTL mode.

In this manner it is possible to manually trigger a test flash while in auto mode so that the correct aperture can be established beforehand. This is particularly valuable with bounced flash when reflection conditions are difficult to judge.

1 The test flash is triggered with the manual firing button		(fig. 26).
If the exposure o.k. indicator	remains dark after the test flash was fired, then

adjust the next larger aperture (smaller f-number) or diminish the distance to the reflection surface or subject, and repeat the test flash.

The f-stop established in this manner must also be set on the camera.

☞To trigger a test flash, hold the camera and flashgun in the same manner as for the actual shot.

This facility can also be used with TTL mode without having to produce test expo- sures. The flashgun is adjusted to auto mode, and the correct aperture is then determined with a test flash in the previously described manner. The established aperture is transferred to the camera, and the flashgun is then readjusted to TTL mode.

This procedure is relatively accurate with lenses of medium focal length of between 28 mm and 85 mm. But in borderline cases underexposure may occur with subsequent TTL exposure.

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