Exposure determination

The amount of light reaching the film plane is determined by a combination of the shutter speed and the lens aperture. A shutter speed of 1/500 sec. lets in twice as much light as a set- ting of 1/1000 sec ., and only half as much light as 1/250 sec. An aperture setting of 1111 lets in twice as much light as 1116, half as much as 118. Thus, if the correct exposure for a particular picture -taking situation is 1/500 at 1111, then 1/250 at 1116 or 111000 at 118 will give the same exposure. It is very convenient to know this interrelation when considering depth of field. The following table illustrates the interrelation between shutter speed and aperture.

1/4000 112000 1/1000 1/500 1/250

4

5.6

8

11

16

Exposure display

The LED exposure indicator lamps can be seen on the right side of the viewfield frame within the viewfinder. The shutter speed number and IInumber in use are also visible. The LED exposure display indicates exposure five ways, as shown in the table below, in accordance with the conditions of each exposure.

Overexposure by more than 1 stop

Overexposure by 1/5 to 1 stop

Correct exposure

Underexposure by 1/5 to 1 stop

Underexposure by more than 1 stop

As correct exposure is approached, the LED exposure display inside the viewfinder is liable to change rapidly and easily within the very narrow range, so it is important to turn the lens aper- ture ring and shutter speed dial carefully. Although intermediate shutter speeds cannot be used, intermediate lens apertures can-just turn the aperture ring for fine adjustment.

Note: When the shutter speed dial is set at B (bulb), the LEO exposure display inside the viewfinder is turned off.

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Nikon 1683, FM2 Body only instruction manual Exposure determination

1683, FM2 Body only specifications

The Nikon 1683, also known as the Nikon FM2, is a highly regarded 35mm film camera that exemplifies the craftsmanship and design ethos of Nikon. Manufactured from 1982 to 2001, the FM2 is cherished by both amateur and professional photographers for its reliability, simplicity, and robust build quality. As a fully manual camera, the FM2 emphasizes the art of traditional photography, allowing users to engage fully with the photographic process.

One of the hallmark features of the FM2 is its durable, lightweight aluminum body. This construction provides not only a feel of solidness but also enhances portability for on-the-go shooting. The camera is equipped with a vertical-travel mechanical focal-plane shutter, capable of achieving shutter speeds from 1/4000 to a full second, with a flash sync speed of 1/200 second. This extensive range enables photographers to adapt to various lighting conditions, making the FM2 versatile for both bright outdoor scenes and low-light environments.

The FM2 boasts a unique feature known as the interchangeable focusing screen, allowing users to customize their viewing experience according to their shooting style or the type of photography being pursued. The clear and bright viewfinder provides precise framing and focusing, essential for achieving sharp images.

Another significant aspect of the Nikon FM2 is its compatibility with a wide range of Nikon F-mount lenses, both manual and autofocus options. This compatibility enables photographers to explore different focal lengths, depths of field, and creative perspectives, enhancing their artistic expression through various lens choices.

The FM2 also incorporates a precise exposure metering system. The camera features a center-weighted metering mode, which provides accurate readings based on the central area of the frame. This ensures that exposure is determined with precision, a critical aspect for achieving well-balanced photographs.

As a mechanical camera, the FM2 does not rely on batteries for basic operation, making it an ideal choice for shoots in remote locations or during extended outdoor adventures. The battery is only required for the light meter, demonstrating the FM2’s focus on functionality and reliability without the dependency on electronic components.

In summary, the Nikon 1683, or FM2, stands out as a timeless piece in the realm of film photography. With its mechanical shutter, robust build, interchangeable focusing screens, and compatibility with an extensive range of lenses, the FM2 remains a favorite for purists who appreciate the manual photography process and the high-quality images that can be achieved through this classic camera.