JPH10197913A - Photometry arithmetic device for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photometry arithmetic device where appropriate photometric distribution corresponding to a focal distance is obtained at a camera provided with a photographing lens such as a zoom lens whose focal distance is varied and a photometric means capable of performing photometry concerning plural photometric areas. SOLUTION: This camera is provided with the zoom lens, a first photometric sensor unit 37 performing the photometry of a wide-angle photometric area, a second photometric sensor unit 39 performing the photometry of a narrower telephotographic photometry area than that included in the wide-angle photometric area and a CPU 31 calculating the proper luminance of an object based on the luminance of the object obtained by the photometry by the first and second photometric sensor units 37 and 39. The CPU 31 calculates the proper luminance of the object by performing weighting in accordance with the current focal distance of the zoom lens to the luminance of the object obtained by the photometry by the first and second photometric sensor units 37 and 39.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photometry operation device for a camera capable of performing photometry and photometry operation on a plurality of subject areas.

[0002]

2. Description of the Related Art In a camera equipped with a zoom lens or a multifocal lens as a photographing lens, a photometric device that measures the luminance of an object without passing through the photographing lens by a photometric optical system separate from the photographing lens is used for photographing. Even if the focal length of the lens changes, the light receiving area does not change.
Therefore, there is known a camera provided with a photometric unit capable of measuring the light intensity of a subject in a subject area having a different size in order to measure the subject in the subject area according to the focal length of the photographing lens, that is, in accordance with the shooting area. ing.

[0003] However, the divided photometric element obtained by dividing the photometric area has a complicated configuration and a complicated operation. Also, the metering means of a conventional camera having two metering areas can switch between average metering and spot metering, but the metering area is the same regardless of the focal length, or the metering distribution is determined according to the focal length. I couldn't change it.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a camera having a variable focal length photographing lens such as a zoom lens and a photometric device capable of photometry in a plurality of photometric areas. An object of the present invention is to provide a photometric operation device.

[0005]

According to a first aspect of the present invention, there is provided a photographing lens having a variable focal length, and a plurality of subject lenses in a plurality of photometric areas having different widths for independently receiving and measuring the subject light. A photometric device, and a computing device that computes subject luminance based on photometric values of the plurality of photometric devices, wherein the narrow photometric region is included in a wider photometric region,
The arithmetic means is characterized in that the arithmetic operation is performed by weighting each photometric value of the plurality of photometric means according to the focal length of the photographing lens. According to a second aspect of the present invention, there is provided a photographic lens having a variable focal length, a first photometric unit for measuring a first subject area, and a second subject area for measuring a narrow second subject area included in the first subject area. 2. A camera comprising: two photometering means; and a calculating means for calculating a subject brightness or an exposure value based on the photometric values of the first and second photometric means. The calculation is performed by weighting the first photometric value measured by the photometer and the second photometric value measured by the second photometric unit in accordance with the focal length of the photographing lens.

Further, one of the arithmetic expressions of the present invention is as follows: Bv = k1 × (fx−W) / (T−W) × BN + (1−k1 × (fx−W) / (T−W)) × BW: (1) (Bv: subject brightness by a photometric operation (apex converted value) k1: a coefficient, 0 <k1 ≦ 1 BN: subject brightness by the photometric value of the second photometric means BW: first photometric means T: the longest (most telephoto) focal length W: the shortest (widest angle) focal length fx: the current focal length. Further, another arithmetic expression of the present invention is as follows: Bv = (1−k2 × (T−fx) / (T−W)) × BN + k2 × (T−fx) / (T−W) × BW (2) (However, 0 <k2 ≦ 1) Bv = k1 × ((fx−W) / (T−W)) ² × BN + (1−k1 × ((fx−W) / (T−W)) ² ) × BW (3) (where 0 <k1 ≦ 1) Bv = k1 × ((fx−W) / (T−W)) ^1/2 × BN + (1−k1 × ((fx−W) / (T−W)) ^1/2 ) × BW (4) (where 0 <k1 ≦ 1) From the shortest focal length W to the intermediate focal length M, Bv = k1 × ((fx−W) / (M −W)) ² × BN + (1−k1 × ((fx−W) / (M−W)) 2) × BW (5) From the intermediate focal length M to the longest focal length T, Bv = k2 × ( (Fx−M) / (T−M)) ^1/2 × BN + (1−k2 × ((fx−M) / (TM)) ^1/2 ) × BW (6) (where 0 <K 2 ≤ 1).

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing one embodiment of a lens shutter type zoom lens camera to which the present invention is applied. This camera includes a zoom lens 13 on the front of a camera body 11 and a first photometric window 1 above the zoom lens 13 from the left.
5, a second photometry window 17, a finder 19, a distance measurement window 21, and a flash emission window (Fresnel lens) 23. A release button 25 is provided on the upper surface of the camera body 11.
And a zoom button 27 (tele button 27T and wide button 27W). The present invention is also applicable to cameras compatible with the new camera system.

FIG. 2 is a block diagram showing an outline of a control system of the whole camera such as a photometric circuit, a distance measuring circuit, and an exposure circuit of the camera. The camera body 11 includes a CPU (microcomputer) 31 that also controls general camera control such as photometric calculation processing, automatic focus adjustment (AF) processing, automatic exposure control processing, film winding and rewinding processing. I have. The CPU 31 includes, as switches, a photometry switch SWS that is turned on by half-pressing in conjunction with the release button 25, a release switch SWR that is turned on by full-pressing,
In conjunction with the zoom button 27, a tele-zoom switch SWTEL that is turned on when the tele button 27T is pressed and a wide zoom switch SWWID that is turned on when the wide button 27W is turned on are input. The CPU 31 executes a predetermined process in response to the on / off operation of these switches.

A DX code reading circuit 33 reads a DX code related to ISO sensitivity from a DX code of a film cartridge loaded in the camera body 11,
Output to U31. The zoom code input circuit 35 detects the current focal length data of the zoom lens 13 via a zoom code plate (not shown) and outputs the data to the CPU 31. Although not shown in detail, the photometric sensor units 37 and 39 include light receiving means (including a photometric sensor), and the photometric windows 15 and 17 are provided.
The light from the subject is received by the photometric sensor, and a photometric signal converted into a current or a voltage corresponding to the luminance of the subject is output to the CPU 31. The CPU 31 calculates the subject brightness Bv based on the photometric signal and the focal length input from the zoom code input circuit 35, and reads the subject brightness Bv and the DX through a DX code reading circuit 33.
An appropriate shutter speed Tv and an appropriate aperture value Av are calculated based on the converted ISO sensitivity Sv.

A passive AF sensor unit 49, which also functions as focus detection or photographing distance detection means, receives a subject light beam and outputs a pair of two-dimensional video signals each including a plurality of video signals. C that captures video signal
The PU 31 stores in the internal RAM for each video signal.
Then, the CPU 31 performs a distance measurement operation based on the pair of video signals stored in the memory, calculates a focusing lens drive amount, and drives the shutter / aperture / focus drive circuit 41 to focus.

Note that this camera uses a photometric switch SWS
Executes metering calculation and ranging calculation when is turned on.
When the release switch SWR is turned on, the shutter / aperture / focus drive circuit 41 is driven based on the calculated lens drive amount, shutter speed Tv, and aperture value Av to drive the focusing lens and the shutter / aperture.

When the telezoom switch SWTEL or the wide zoom switch SWWID linked to the zoom button 27 is turned on, the CPU 31 causes the zoom motor drive circuit 45
, The zoom motor M is driven, and the zoom lens 13 is zoomed (tele-zoom or wide-zoom).
When the power is turned off, the zoom motor M is driven to a storage position where the lens barrel of the zoom lens 13 is located (shortest) within the appearance of the camera body 11, and when the power is turned on, the zoom motor M is driven to the wide end position. The zoom lens 13 has a tele-end macro function. When a macro switch (not shown) is turned on, the zoom lens M is driven to drive the zoom lens 1.
3 is driven to a macro position beyond the tele end position. The lens position such as the focal length and macro position of the zoom lens 13 is detected by a zoom code input circuit 35.
The photographing information of this camera is displayed on a not-shown finder display and an LCD provided on the surface of the camera body 11 via a finder LCD display circuit 47, and the strobe emits light via a strobe circuit 43. .

Next, the photometric calculation which is a feature of the present invention will be described below. FIG. 3 schematically shows an example of the relationship between the photographing area and the photometric areas of the photometric sensor units 37 and 39. In the figure, in the first photometric sensor unit 37, the zoom lens 13 has the widest angle (shortest focal length).
Wide-angle photometry area 3 in which wide-angle shooting area (screen) 51W when zooming in can be averaged or center-weighted averaged
7S, and the second photometry sensor unit 39 can perform average photometry or center-weighted average photometry in an area slightly smaller than the telephoto shooting area (screen) 51T when the zoom lens 13 zooms to the maximum telephoto (longest focal length). Telephoto metering area 3
9S. The photometry areas 37S and 39S are formed so that photometry can be performed on an area centered on substantially the center of the photographing areas 51W and 51T, and the wide-angle photometry area 37S includes a telephotometry area 39S. That is, the area of the telephoto-side photometry area 39S is an area detected by both the photometry sensor unit 39 and the photometry sensor unit 37.

In the illustrated embodiment, the area ratio between the wide-angle photographing area 51W and the wide-angle (wide-area) photometric area 37S and the area ratio between the telephoto photographing area 51T and the telephoto (center) photometric area 39S are substantially the same. The wide-angle photometry area 37S may be larger than the wide-angle photography area 51W, and the telephotometry area 39S may be smaller.
It is needless to say that the center of T may have a size capable of spot photometry, and the shapes, sizes, and ratios of the photometric regions 37S and 39S are not limited to the illustrated embodiment. Further, the present invention can be applied to a camera compatible with the new camera system.

Hereinafter, the photometric calculation formulas (algorithms) of the present invention will be described by defining each code as follows. Bv: luminance of the subject by the photometric calculation (apex converted value) BW: first (wide-angle) subject luminance by the photometric value of the first photometric sensor unit 37 BN: second (telephoto) by the photometric value of the second photometric sensor unit 39 Subject luminance T: Longest (most telephoto) focal length of zoom lens W: Shortest (widest angle) focal length of zoom lens fx: Current focal length of zoom lens

[First Embodiment] The focal length of the zoom lens 13 is divided into two regions, a wide-angle region and a telephoto region. In the wide-angle region, exposure control is performed only by a wide range of subject brightness BW. Exposure control is performed only by the small area subject luminance BN. According to the first embodiment, with a simple configuration, at the entire focal length of the zoom lens 13,
The subject brightness Bv can be obtained by a photometric distribution close to the average photometric.

[Second Embodiment] The focal length of the zoom lens 13 is divided into three or more regions, or
In the shortest focal length region, the subject luminance Bv is calculated using only the wide range of the subject luminance BW, and the weight of the small region subject luminance BN is simply increased toward the longest focal length region. The second embodiment has a configuration in which the subject brightness BN of the small area is weighted more heavily in the longest focal length area, or the subject brightness Bv is calculated only by the subject brightness BN of the small area. Can be transformed.

[Third Embodiment] The zoom area of the zoom lens 13 is divided into a wide-angle area, an intermediate area, and a telephoto area. In the wide-angle area, the object luminance Bv is calculated based on only the wide-area object luminance BW. Then, the subject brightness Bv is calculated by weighting each of the subject brightnesses BW and BN in the wide-angle and small areas by 1/2, and in the telephoto area, the subject brightness Bv is calculated using only the subject brightness BN in the small area.

[Fourth Embodiment] The fourth embodiment is a more specific embodiment of the second embodiment. In the fourth embodiment,
The weights of the object luminances BW and BN are given as in the following equation (1). Bv = k1 × (fx−W) / (T−W) × BN + (1−k1 × (fx−W) / (T−W)) × BW (1) (where 0 <k1 ≦ 1) By calculating the subject brightness Bv according to this equation (1),
An effect close to the average photometry can be obtained in the entire focal length range. The relationship between the weights of the object brightnesses BW and BN and the focal length is graphed and shown in FIGS. In the figure, the vertical axis represents the weighting, the horizontal axis represents the focal length, the solid line represents the weighting of the subject brightness BW in a wide area, and the broken line represents the weighting of the subject brightness BN in a small area. FIG. 4 shows the relationship between the subject brightnesses BW and BN and the focal length when the coefficient k1 is set to 1, and the relationship between the subject brightnesses BW and BN and the focal length when the coefficient k1 is set to 0.5. Is shown in FIG. When the coefficient k1 is reduced, the weight of the subject brightness BN of the small area is reduced, and an effect closer to the average photometry can be obtained.

[Fifth Embodiment] The fifth embodiment is a modification of the fourth embodiment, and weights of subject brightnesses BW and BN are given by the following equation (2). Bv = (1−k2 × (T−fx) / (T−W)) × BN + k2 × (T−fx) / (T−W) × BW (2) (where 0 <k2 ≦ 1) FIG. 6 is a graph showing the relationship between the weights of the subject luminances BW and BN and the focal length in equation (2) (where k2 = 0.5).

According to the equation (2), the subject brightness BN of the small area is heavily weighted, so that an effect almost similar to spot metering can be obtained as a whole. If the telephoto metering area 39S is made narrower (smaller), the effect of spot photometry is enhanced even in the long focal length area. Also, if the coefficient k2 is reduced, the weighting of the telephoto luminance BN becomes heavier, so that the effect of center-weighted or spot photometry is enhanced.

In the above embodiment, the weighting changes linearly in proportion to the focal length. Next, an embodiment in which the weighting changes in a quadratic curve in proportion to the focal length will be described.

[Sixth Embodiment] In the sixth embodiment, the object brightness B in a wide area increases from the shortest focal length to the longest focal length.
The weight of W was sharply reduced in the long focal length region, and the weight of the subject brightness BN in the small region was rapidly increased in the long focal length region. Bv = k1 × ((fx−W) / (T−W)) ² × BN + (1−k1 × ((fx−W) / (T−W)) ² ) × BW
(3) However, 0 <k1 ≦ 1 The relationship between the weighting of the subject luminances BW and BN and the focal length in the equation (3) is shown in a graph in FIG.

[Seventh Embodiment] In the seventh embodiment, a wide range of object brightness B is applied from the shortest focal length to the longest focal length.
The weight of W was sharply reduced in the short focal length region, and the weight of the subject brightness BN of the small region was rapidly increased in the short focal length region. Bv = k1 × ((fx−W) / (T−W)) ^1/2 × BN + (1−k1 × ((fx−W) / (T−W)) ^1/2 ) × BW (4) However, 0 <k1.ltoreq.1 The relationship between the weights of the subject luminances BW and BN and the focal length in the equation (4) is shown in a graph in FIG.

[Eighth Embodiment] In an eighth embodiment, the focal length of the zoom lens 13 is divided into two regions, from the shortest focal length W to the intermediate focal length M, and from the intermediate focal length M to the longest focal length T. Then, from the shortest focal length W to the intermediate focal length M
Until then, the subject brightness Bv is determined by equation (5). Bv = k1 × ((fx−W) / (M−W)) ² × BN + (1−k1 × ((fx−W) / (M−W)) ² ) × BW (5) From the focal length M to the longest focal length T, the subject brightness Bv is obtained by the following equation (6). Bv = k2.times. ((Fx-M) / (TM)) ^{1 /} 2.times.BN + (1-k2.times. ((Fx-M) / (TM)) ^1/2 ) .times.BW (6) ) In these equations (5) and (6), the object luminances BW, B
FIG. 9 is a graph showing the relationship between the weighting of N and the focal length.
It was shown to.

The sixth embodiment is suitable for a wide-angle zoom lens (for example, a focal length of 20 to 50 mm) for photographing that emphasizes landscape. The seventh embodiment is suitable for photographing with emphasis on portraits in a telephoto zoom lens (for example, a focal length of 40 to 120 mm). In the eighth embodiment, a high-magnification zoom lens (for example, with a focal length of 2
0-200 mm).

Ninth Embodiment In the ninth embodiment of the present invention, the focal length of the zoom lens is divided into three or more regions, and the weight of the subject brightness is set for each region.
That is, the coefficients kf (k1, k2) of the equations (1) to (6) are set. This configuration divides the focal length into a number of regions,
This is suitable for a zoom lens that performs zooming stepwise in divided focal length area units.

In another embodiment of the present invention, the variable focal length range of the zoom lens is classified into three areas of a wide-angle area, an intermediate area, and a telephoto area, and photometric calculation is performed. Calculate only with BW, and in the middle area,
It is also possible to adopt a configuration in which the same weight is applied to the subject brightnesses BW and BN in the wide-angle and small areas, and the calculation is performed using only the subject brightness BN in the small area in the telephoto area.

[0029]

As is clear from the above description, the present invention
A photographic lens having a variable focal length, a plurality of photometric means for independently receiving and measuring subject light in a plurality of photometric areas having different widths, and subject brightness is calculated based on photometric values of the plurality of photometric means. And a calculating means, wherein the narrow photometric area is included in a wider photometric area, and the calculating means responds to each photometric value of the plurality of photometric means in accordance with a focal length of the photographing lens. Since the above-mentioned calculation is executed with the weighting, the photometric calculation corresponding to the change in the focal length or the photometric distribution can be changed by the two photometric means.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a zoom lens shutter camera equipped with a photometric operation device of the present invention.

FIG. 2 is a block diagram showing one embodiment of a circuit configuration of the camera.

FIG. 3 is a diagram schematically showing a relationship between a shooting area and a photometry area of the camera.

FIG. 4 is a diagram showing a third relationship between the weighting of the subject brightness in a wide area, the weighting of the subject brightness in a small area, and the focal length of the camera.
It is a figure which shows an Example graphically.

FIG. 5 is a diagram illustrating a fourth relationship between the weighting of the subject brightness in a wide area, the weighting of the subject brightness in a small area, and the focal length of the camera.
It is a figure which shows an Example graphically.

FIG. 6 is a diagram illustrating a fifth example of the relationship between the weight of the subject brightness in a wide area, the weight of the subject brightness in a small area, and the focal length of the camera;
It is a figure which shows an Example graphically.

FIG. 7 is a diagram illustrating a sixth example of the relationship between the weight of the subject brightness in a wide area, the weight of the subject brightness in a small area, and the focal length of the camera.
It is a figure which shows an Example graphically.

FIG. 8 is a diagram illustrating a seventh relationship between the weight of the subject brightness in a wide area, the weight of the subject brightness in a small area, and the focal length of the camera;
It is a figure which shows an Example graphically.

FIG. 9 is a diagram illustrating an eighth relationship between the weight of the subject brightness in the wide area, the weight of the subject brightness in the small area, and the focal length of the camera;
It is a figure which shows an Example graphically.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Camera body 13 Zoom lens (photography lens which can change focal length) 31 CPU (photometric calculation means) 37 1st photometric sensor unit (1st photometric means) 37S Wide-angle photometric area (1st photometric area) 39 2nd photometric sensor Unit (second photometry unit) 39S Telephotometry area (second photometry area) 51W Wide-angle photography area (first photography area) 51T Telephoto photography area (second photography area)

Claims (13)

[Claims] 1. A photographing lens having a variable focal length, a plurality of photometric means for independently receiving and measuring the subject light in a plurality of photometric areas having different widths, and a photometric value based on the photometric values of the plurality of photometric means. Computing means for computing subject brightness, wherein the narrow photometric area is included in a wider photometric area, and the computing means includes a photo lens for each photometric value of the plurality of photometric means. Wherein the weighting is performed in accordance with the focal length of the camera and the calculation is executed. 2. A photographic lens having a variable focal length, a first photometer for measuring light of a first subject area, and a second photometer for measuring a narrow second subject area included in the first subject area.
A camera comprising: a photometric unit; and a calculating unit configured to calculate a subject brightness or an exposure value based on photometric values of the first and second photometric units, wherein the calculating unit measures light by the first photometric unit. A camera configured to execute the calculation by a predetermined calculation expression in which the first photometry value and the second photometry value measured by the second photometry unit are weighted according to the focal length of the photographing lens. Photometric computing device. 3. The photometric operation device for a camera according to claim 2, wherein the center of each of the photometric regions substantially coincides with the center of the photographing region. 4. The photometric operation device for a camera according to claim 2, wherein an area ratio between a photographing area of said photographing lens at a shortest focal length and said first subject area and a photographing lens at a longest focal length of said photographing lens. A photometric operation device for a camera, wherein an area ratio between a shooting region and the second subject region is substantially the same. 5. The photometric operation device for a camera according to claim 2, wherein said photographing lens is a bifocal lens or a zoom lens, and said arithmetic means sets a focal length to a short-point distance. In the short focal length area, the photometric calculation is performed using only the photometric value of the first photometric means, and in the long focal length area, only the photometric value of the second photometric means is used. A photometric calculation device for a camera. 6. The photometric operation device for a camera according to claim 2, wherein the photographing lens is a zoom lens, and a photometric area of the first photometric means is a shortest focus of the zoom lens. Corresponding to the shooting area by distance,
The photometric area of the second photometric means corresponds to a photographing area based on the longest focal length of the zoom lens, and the calculating means sets only the first photometric value of the first photometric means when the zoom lens has the shortest focal length. Executes the photometric calculation by
As the focal length of the zoom lens becomes longer than the shortest focal length, the weight of the second photometric value by the second photometric means is increased, and photometric calculation is executed based on the first and second photometric values. A photometric calculation device for a camera. 7. The photometric operation device for a camera according to claim 2, wherein the photographing lens is a zoom lens, and a variable focal length range of the zoom lens is set to a wide-angle area, an intermediate area, and The image is divided into three regions of a telephoto region, and the arithmetic unit performs a photometric operation in a wide-angle region only with the photometric value of the first photometric unit.
The camera is characterized in that the photometric value of the first photometric means and the photometric value of the second photometric means are calculated with the same weight, and in the telephoto area, the photometric value is calculated only by the photometric value of the second photometric means. Photometric calculation device. 8. The photometric operation device for a camera according to claim 2, wherein said operation means calculates an object brightness Bv by an equation: Bv = k1 × (fx−W) / (T− W) × BN + (1−k1 × (fx−W) / (T−W)) × BW (1) (where, Bv: subject brightness (apex-converted value) by photometric calculation, k1: coefficient, 0 <k1 ≦ 1 BN: Subject luminance by photometric value of second photometric means BW: Subject luminance by photometric value of first photometric means T: Longest (most telephoto) focal length W: Shortest (widest) focal length fx: Current (A focal length). 9. The photometric operation device for a camera according to claim 2, wherein said operation means calculates an object brightness Bv by an equation: Bv = (1−k2 × (T−fx) / (T−W)) × BN + k2 × (T−fx) / (T−W) × BW (2) (where 0 <k2 ≦ 1). 10. The photometric operation device for a camera according to claim 2, wherein said operation means calculates the subject brightness Bv by the following equation: Bv = k1 × ((fx−W) / (T −W)) ² × BN + (1−k1 × ((fx−W) / (T−W)) ² ) × BW (3) (where 0 <k1 ≦ 1) Photometric computing device for a camera 11. The photometric operation device for a camera according to claim 2, wherein said operation means calculates the subject brightness Bv by the following equation: Bv = k1 × ((fx−W) / (T −W)) ^1/2 × BN + (1−k1 × ((fx−W) / (T−W)) ^1/2 ) × BW (4) (where 0 <k1 ≦ 1) A photometric calculation device for a camera. 12. The photometric calculation device for a camera according to claim 2, wherein the calculation means includes a subject brightness B from a shortest focal length W to an intermediate focal length M.
v is an arithmetic expression, Bv = k1 × ((fx−W) / (M−W)) ² × BN + (1−k1 × ((fx−W) / (M−W)) ² ) × BW ( 5) From the intermediate focal length M to the longest focal length T,
The calculation of the object brightness Bv is as follows: Bv = k2 × ((fx−M) / (TM)) ^1/2 × BN + (1−k2 × ((fx−M) / (TM)) ^{1 / 2} ) × BW (6) (where 0 <k2 ≦ 1). 13. The photometric operation device for a camera according to claim 2, wherein the photographing lens divides a zoomable focal length into a plurality of focal length regions and performs zooming stepwise. A lens, wherein the photometric calculation means includes:
A photometric calculation device for a camera, wherein a proper subject brightness Bv is calculated by weighting a first subject brightness and a second subject brightness with a predetermined weight.