Nikon Elw instruction manual Exposure Control Lens aperture diaphragm

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EXPOSURE CONTROL-Continued

Lens aperture diaphragm

The Nikomat ELW can be used with any Nikkor interchangeable lens with a Nikon F bayonet

mount. Except the reflex lens, these lenses are eq uipped with aperture diaphragms, and graduated

with a stop by stop scale from full aperture to the minimum stop number.

When a Nikkor lens is mounted on to the camera, it is designed to stay open at full aperture even when the aperture ring is turned down . The aper- ture diaphragm is set only when the shutter button is snapped and the shutter curtain is opened . This is called the automatic diaphragm mechanism. The diaphragm regulates the amount of light reaching the film, while stopping down the aperture by one graduation (from F5 .6 to F8), cuts the amount of available light in half. Diaphragm openings also have a direct bearing on the depth of field. (Refer to page 47.)

Depth-of-field preview button

The depth-of-field preview button lets you check the depth of field before shooting to make any desired adjustments. Press the button and the lens stops down to the preselected aperture to allow you to see how much background or foreground is in or out of focus.

*In full ·aperture measurement, if the shutter is released while simultaneously pressing the depth-of-field preview button, the correct exposure will not be obtained . Also, do not operate the film advance lever while pressing the button.

*When using the Auto Winder AW-l do not snap the shutter while pressing this button . If you do so by ac- cident, switch the AW-l power off and then on again to restore normal operation.

For detailed operation, refer to page 47 .

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Contents Page Foreword Contents Nomenclature NOM Enclature Back Nikon Auto Winder AW-l Features Page Specifications Synch cords for positive Page Basic Operations Install ing the battery Battery CareBattery test Battery Care Replacing the battery Page Maximum aperture indicator Mounting the LensMaximum aperture scale Removing the LensTo attach the AW-1 To remove the AW-1 Attaching & Removing the Nikon Auto Winder AW-1General Steps of PICTURE-TAKING Loading a film Page General Steps of PICTURE-TAKING Setting the ASA film speed Setting shutter-speed dial at a AutoWinding the film General Steps of PICTURE-TAKING Blank exposure Setting the aperture ring GEN E RAL Steps of Pictu RE-T AKI NG Holding the camera Prefocusing General Steps of PICTURE-TAKING Releasing the shutter Rewinding and unloading film General Steps of Picture -TAKING Continu ed Page Page Appli ED Operations TTL Exposure Meter Page TTL Exposure Meter 800 400 200 160 100 TTL Exposure Meter Section a Shutter speed dial and the use Exposure ControlPage Exposure Control Lens aperture diaphragm Stop-down exposure measurement Compensation of Exposure How to Use Memory Lock ~ No Depth of Field Depth-of-field scaleSELF-TIMER Mirror Lock Infrared PhotographyFlash Synchronization 1000 500 250 125 Page Accessories Nikon Auto Winder AW-l FIL Ters MountLens Hood Other Accessories Lubrication should be left to an authorized ser- viceman Page Nikon
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