Kyocera NX Types of metering modes and their features Metering range, Automatic metering range

1. Types of metering modes and their features

2. Metering range

Evaluative metering

Image field top

Image field bottom

Metering sensitivity chart

Exposure meter in viewfinder

Difference between center-weighted aver- age metering and the measured value.

Center-weighted average metering

Image

field top

Image field bottom

Metering sensitivity chart

Center divided partial metering

Image field

top

Image field bottom

Metering sensitivity chart

Center divided partial metering range

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<Evaluative metering ( mark)>

With evaluative metering, the picture is divided into five sections, as illustrated. The autoexposure sys- tem calculates the appropriate exposure based on an analysis of subject conditions and positioning.

Because of this, evaluative metering can be used not only for general photography but also when the subject is lit from behind, with virtually no exposure compensation or adjust- ment required.

“ ” The exposure meter in the viewfinder may be changed to display evaluative metering and center-weighted average metering, or the difference between center divided par- tial metering and the measured value.

<Center-weighted average metering) ( mark)>

In this mode, the light is measured with emphasis on the brightness of the subject at the center of the viewfinder. To a certain extent it also takes into consideration the brightness of the area surround- ing the center to determine the exposure value.

This mode can be used for general photogra- phy but also for easily determining the expo- sure for subjects in motion.

<Center divided partial metering> ( mark)

Only the brightness value of the subject corre- sponding to an area of approximately 5% of the scene is measured.

Use spot metering when the difference between the brightness value of the subject and the background is high. A good example is people lit from behind or standing in spotlights on center stages. It can also be used for making

very selective readings of specific areas within the

scene.

The autoexposure system in the camera measures light in a shutter speed range of 32 seconds to 1/4000 second in the auto exposure mode.

																																							The parts indicated in color within the
														32		32		32		32		32		32															range indicate the automatic metering
										16		22			22		22		22		22		22		22	32	22	32	22	32	22	32	22	32					range when using ISO 100 film and an
														16		16		16		16		16		16		16
								11				11			11		11				11							16		16		16
						8													11				11		11		11		11		11								F1.4 lens.
					.6					8				8		8		8		8		8		8		8		8		8
								.6				.6			.6		.6
																			.6		.6		.6		.6		.6		.6
				4	5			5				5			5		5
			.8		.8	4				4				4		4		4	5	4	5	4	5	4	5	4	5	4	5
								.8				.8			.8		.8		.8
			2		2																.8		.8		.8		.8
		2		2		2		2				2			2		2		2
	.4		.4		.4			.4		2				2		2		2		2	2	2	2	2	2	2	2
												.4			.4		.4		.4		.4
ISO	1		1		1			1															1.4		.4
												1			1	1			1		1																		32
																									1
6400																																							16
	3200
	1600																																						8
		800
			400																																				4
				200																																				shutter
					100		50																																2
									25
											12
													6																											1
																																								1/2
																																								1/4speed
																																								1/8
																																								1/15
																																								1/30(second)
																																								1/60
																																								1/125
																																								1/250
																																								1/500
																																								1/1000
																																								1/2000
																																								1/4000
																									0		1		2		3		4	5	6	7	8	9	10 11 12 13 14	15 16 17 18 19 20 21

EV value

<Automatic metering range>

This table shows the mutual relationship between aperture, shutter speed and EV (exposure value). For example, when using ISO 100 film and an 50mmF1.4 lens in the average metering mode, the automatic metering range is the range indicated by the points where the line extending diagonally from “16” (the Planar T *50 mm minimum aperture is F16) and “1.4” (the maximum aperture) on the aperture table's ISO 100 section intersects with the vertical line (the EV line) and horizontal line (the shutter speed line). Thus, that is EV “0” to EV “20”.

*The EV expresses the combinations of aperture and shutter speed that achieve the same exposure effect on film. For example, the table shows that at EV 13 the same exposure effect can be achieved at F16 at 1/30 and F8 at 1/125 second. While the EV represents an equivalent exposure the image effects of faster and slower shutter speeds and larger and smaller apertures differ.

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