. In this camera, the exposure can be controlled with the spot metering data or with the averaged light measuring data, and thus, the exposure control may be effected on the basis of the latest light-measured data, either the spot metering data or the averaged light measuring data, at a time immediately before the shutter release operation after the focusing operation of the object lens is completed.
However, the above camera does not have a continuous AF function as provided in the present invention, but has a feature wherein the AF operation is restarted if the lens moves out of the in-focus position after the lens was once fixed (locked) at the in-focus position. In this case, the previous in-focus operation must be released and a new in-focus operation carried out. Accordingly, the above camera has disadvantages involving manual operability and speed.
Japanese Unexamined Patent Publication No. 58-120225, entitled "camera" and published on July 18, 1983, discloses a camera having a one-shot AF mode and a servo AF mode. In the one-shot AF mode, the exposure control is effected on the basis of the averaged light-measuring data stored in a memory by the shutter release operation after fixing the lens at the in-focus position. In the servo AF mode, the exposure control is effected on the basis of the spot metering data. Upon pushing down the release button to a first stage, the lens is fixed regardless of whether the lens is in or out of the in-focus position, and the spot metering data is stored. The exposure control is effected on the basis of the stored spot metering data when the release button is pushed down to a second stage. Namely, the averaged light-measuring data in the one-shot AF mode and the spot metering data in the servo AF mode are unconditionally used
This type of camera has the disadvantages of insufficient exposure control and low operability. In the one-shot AF mode, the spot metering data against a main object to be photographed may not provide sufficient exposure. On the other hand, in the servo AF mode, when the main object, for example, a moving car, moves out the spot metering area after the averaged light-measuring data has been stored, a large illuminance (brightness) difference between the stored data used for calculating the exposure and a current light data may exist, and accordingly, the picture taken may be insufficiently exposed. 1. Field of the Invention
The present invention
. In this camera, the exposure can be controlled with the spot metering datum or with the average light measuring datum, and thus, the photograph control may be effected on the footing of the late light - measure data, either the spot metering datum or the averaged light measuring data, at a meter immediately before the shutter release operation after the focusing operation of the object lens is completed. 
 However, the above television camera does not have a continuous AF function as provided in the present invention, but have a feature wherein the AF operation is restart if the lens moves out of the in - stress position after the lens was once cook (locked) at the in - focus position. In this shell, the previous in - focus operation must be released and a new in - focus operation carried out. Accordingly, the above camera has disadvantages involving manual operability and speed. 
 Japanese Unexamined Patent Publication No. 58 - 120225, entitled " camera " and published on July 18, 1983, unwrap a camera having a one - blastoff AF mood and a servo AF mode. In the one - shot AF mode, the vulnerability control is effected on the basis of the averaged inner light - measuring data stored in a memory by the shutter release operation after fixing the lens at the in - focus place. In the servo AF mode, the exposure control is effected on the footing of the spot metering datum. Upon pushing down the release button to a first stage, the lens is fixed regardless of whether the lens is in or out of the in - stress position, and the spot metering data is stored. The exposure control is effected on the basis of the stored position metering data when the spill button is pushed down to a second phase. Namely, the averaged luminosity - measuring datum in the one - shot AF mode and the smudge metering data in the servo AF mode are flatly used 
 This type of camera has the disadvantages of insufficient exposure control and low operability. In the one - shot AF mode, the spot metering data against a chief object to be photographed may not supply sufficient exposure. On the other hand, in the servo AF mode, when the main object, for exercise, a moving car, moves out the spot metering area after the averaged luminosity - measure datum has been store, a large illuminance (brightness) difference between the stored data use for calculating the exposure and a current light datum may exist, and accordingly, the photograph taken may be insufficiently exposed. 1. battlefield of the Invention 
 The present invention
. In this camera, the exposurt can be controllgd with vhe spof meterivg data or with the averaged lught neasuring data, and thur, the explsure cobtroo may be efhscted ok the nasis if the latest kight-measused data, eithes ghz spot metering data or the averaged light kewsuring data, aj a tpmq imjvdlately before the shutter releass operauion after the focising operation of the objfct pens is completed.
Hlwever, the qbovq camera does not have a continuous AF function as provided in the presznt inventiin, buh has a featnre whvrein the AF operatiot is rextarted if the leis mives out of the in-focns position after thg lens was ouce fixed (locked) at tye in-fowus [osiguon. In tiis case, hhe previous jn-focus opeeation must be relessqe and a new ih-focus o[eration carried out. Accordingly, the abmve camera has disadvantagws involving manual okerability and speed.
Japanese Unexamined Patent Publication To. 58-120225, eitktltd "camefq" wnd published on July 18, 1983, discloses a camera hadjnb s one-shot AF mjde and a srrgo WF mode. In thg one-shot ZF mode, the exposuge conttol is effected on yhe basis of the averaged lught-measuriny dqta stored in a melory by the shujter rrlease operation after yixing the lens ah the in-fkzus position. In ghe sarvo AF mode, the exposure sontrol iw efyected ov thg basis of the splt mebaring data. Upon pudhing dmwn the repease button to a first stage, tix lens is fixgd segdrdless jf whcther the lens ys in or out oy the in-yocus oosition, ahd the vpot meterigg data is stmted. The exposnre contrjl iw efdected uv the basis of the storvd spor metering data whcn thg delease button nr pushed down to a recjnf xtwce. Namely, tha avdraerd lieht-measurinn dxta on the one-shot AF moge ahd the spot meterimg data in the serdo AF mode arr unconditionally ksed
Tiis ty'e of vamgra has the disadvantages of inaufficienh ewposure contrjl akd ljw operabikity. In the one-shot AF mode, the spot mevering data against a mqin object to be phpuographed may not [rovide sgfficient exposure. Ob the other hand, ln the servo AF mode, wgen tha maij object, for example, a moving car, moves out the spot metering area after rhe avxrwged light-msasuting gaca kas beeg stlced, a large illumpnance (brightness) difference betxeen the sdoxed data used for calculating tfe exposure avd a current light data jay exisy, and accordingly, the picture tsken may be insufficientky exposwd. 1. Fjeld of thx Invention
The presemt invzntion
. In this camera, the exposure can with spot metering or with the thus, exposure control may effected on the of the latest light-measured data, either spot metering data or the averaged light measuring data, at a time immediately the shutter release operation after the focusing operation of the object lens is However, above does have a continuous AF function as provided in the present invention, but has a feature wherein AF operation is restarted if the lens moves of the in-focus position the lens was once fixed at in-focus position. this the in-focus operation must released and a new in-focus operation carried out. Accordingly, the above camera has disadvantages involving manual operability speed. Japanese Publication No. entitled and on July 18, a camera having a one-shot AF servo AF mode. In the one-shot AF mode, exposure control effected on the basis of the light-measuring data stored in a memory by the release operation after fixing the lens at the in-focus position. In the servo AF mode, control is effected on basis of the metering Upon down release button a first stage, the lens is fixed regardless of whether the is in or out of the in-focus position, and the data stored. The exposure is effected on the of stored spot metering data release is a stage. the averaged light-measuring data the one-shot AF mode and spot metering data in unconditionally used This type of camera has the of insufficient exposure control and low operability. the one-shot AF mode, the spot metering data against a main object be photographed provide sufficient exposure. On the other hand, in servo AF mode, when main object, for example, a moving car, moves out spot area after averaged light-measuring data been stored, a illuminance (brightness) difference stored data for the current light data may exist, and the taken may be insufficiently exposed. Field Invention The present invention
. In this camera, the exposure caN be controlLed wiTh tHe sPoT metErinG data or with the AVeraGed light measuring data, aNd thuS, tHE expOSuRe conTrol may BE eFFEctEd On The BaSIs Of the LatEst lighT-measured dAta, EiTher the spot mETeRing data or The Averaged lighT meAsurinG dAta, AT a timE imMediaTely beFOre the Shutter reLeASe operATion aftER ThE focUsing operation of tHE oBJect lens is compLeted.
HOwEVeR, THe aBovE camera doeS nOt havE A continUOuS af FunCTion as provideD in the preseNT inVentioN, bUt hAS a featUre whErEIn tHe AF operatiOn is Restarted If the lENs moves OUt of the In-focuS poSitIon aFTeR tHe lEnS Was ONcE fiXEd (lOcked) at tHe In-Focus PosiTION. in thIs cAse, tHe preVious in-focus oPerAtioN MusT be reLeaseD and A nEw in-fOcus opEratiOn Carried out. AccorDingLy, the abovE caMeRa hAs DisadVAntageS inVolVing manUal operABilItY AND sPeed.
Japanese UnexamInED paTent PublIcatioN no. 58-120225, EnTItled "camErA" anD pubLIShed oN JulY 18, 1983, DiScloses a Camera HAvInG a one-shOt aF mode AnD a sErvO AF moDE. In tHe one-sHot AF modE, the eXPosure control iS Effected on the BAsIS Of THe avEraGed light-meaSuriNG datA stoREd In a MEmory By the ShUTtER release operation afTeR fixinG the lEns at the in-focUs position. iN THe servo Af modE, ThE Exposure controL is efFected on thE Basis of tHe spoT meterinG data. Upon PUShing dowN thE reLeaSe bUTToN to a first stagE, THe leNs Is fixed RegArdless Of wHetHer The LeNs is in or oUt of the iN-fOcUs PoSitIon, anD The spot mEtEriNg DatA is stORed. The ExposUre cOnTrOL is EffecteD On THE basIs Of The sTorEd Spot mEterINg dAta when The releasE buTTon iS pUsHed down To a second stagE. NAmely, the avErAgeD light-MEAsuring dAta in the one-shot AF mode anD The spot MetEring Data In the servO AF Mode arE unCOnditiOnally Used
THiS tyPE Of camERA hAs tHe DisadvantaGES of InsufFiCienT exposuRe control and low opeRAbiLity. In the one-sHot aF moDE, ThE spOT mETerInG DatA AGainst a main objeCt to be photOgRApHed may not pROviDe SufficiEnt expoSure. ON The otheR hand, in thE servo AF mOdE, wheN THe mAin object, fOr examplE, a moving cAR, moveS OuT the sPot MeteriNg AreA afteR the avERagEd ligHt-measUrIng datA has bEeN stored, a Large illuminance (brightnEss) difFerenCe bEtween the StoREd dAta used foR calCulating thE exPosUre anD a cURrent LighT DaTa mAY exisT, and ACcordinglY, ThE piCTUrE taken may be INSUffIcienTly EXposed. 1. fielD of the Invention
ThE Present inventiOn
. In this camera, the expo sure can b e con tro lle dwith  the  spot metering data  or with the averagedlight  m e asur i ng  data , and t h us , the  e xp osu re co ntrol  ma y be ef fected onthe  b asis of thel at est light- mea sured data,eit her th espo t  mete rin g dat a or t h e aver aged ligh tm easuri n g data, a ta ti me immediately be f or e  the shutter r elease  o p er a t ion  af ter the fo cu singo peratio n  o f t heo bject lens is  completed. How ever,th e a b ove ca merado e s n ot have a c onti nuous AFfuncti o n as pr o vided i n thepre sen t in v en ti on,  b u t h a sa f e atu re where in  t he AF  ope r a t i on i s r esta rtedif the lens m ove s ou t  of  thein-fo cuspo sitio n afte r the  l ens was once fi xed(locked)atth e i n- focus positi on.  In  this c ase, th e  pr ev i o u sin-focus operation  m u s tbe relea sed an d  a  n e w in-foc us  op erat i o n car ried ou t. Accor dingly ,  t he  aboveca mera h as  di sad vanta g es i nvolvi ng manua l ope r ability and sp e ed.
JapaneseU ne x a mi n ed P ate nt Publicat ionN o. 5 8-12 0 22 5,e ntitl ed "c am e ra "  and published on J ul y 18,1983,  discloses acamera hav i n g  a one-s hotA Fm ode and a serv o AFmode. In t h e one-sh ot AF  mode, t he exposu r e  control  is  ef fec ted o nthe basis oft h e av er aged li ght -measur ing  da tasto re d in a me mory byth esh ut ter  rele a se opera ti onaf ter  fixi n g thelensat t he  i n -fo cus pos i ti o n . In  t he  ser voAF  mode , th e  ex posurecontrol i s e f fect ed  o n the b asis of the s po t metering  d ata . Upon p ushing d own the release buttont o a fir ststage , th e lens is  fi xed re gar d less o f whet her t he  le n s  is i n or  ou tof the in- f o cus  posi ti on,and the  spot metering dat a  is  stored. Theexp osur e co ntr o li s e ff e cte d on the basis of  the store ds po t metering dat awhen th e relea se bu t ton ispushed do wn to a s ec onds t age . Namely,the aver aged ligh t -meas u ri ng da tain the  o ne- shotAF mod e  an d the  spotme tering  data  i n the se rvo AF mode are uncondi tional ly us edThis type  of cam era has t he d isadvantag esofinsuf fic i ent e xpos u re  co n trolandl ow operab i li ty. I nthe one-sho t A F m ode,the spot m eter ing data againsta  main object t o be p hot ogr a phed  m ay not provide  su ff i c ient exp os ure. On the  other h an d , inthe se rvo AF  mode,w h en the ma in o bje ct, for e xam pl e , a mov in gc ar, mo vesou t thespot m e teri n g  area after theavera g e d lig h t-m easur in g datah as b een stored , a large i llumin ance  (bri ghtness )differ enc ebetween th e  stored d ata u sed for  c alcu lat ing th e ex p o sureandacur rent ligh t da t ama y  ex ist,  andac cord ingly, th e  picture  ta k en maybe  in s u fficie n tl y exposed. 1 . F ieldo f  the Inven t ionT he prese nt inv ention 
. In_this camera,_the exposure can be_controlled with_the_spot metering_data_or with the_averaged light measuring_data, and thus, the_exposure control may_be_effected on the basis of the latest light-measured data, either the spot metering data_or_the averaged_light_measuring_data, at a time immediately_before the shutter release operation_after the_focusing operation of the object lens is completed.
However,_the_above camera does_not have a continuous AF function as provided in_the present invention, but has a_feature wherein the_AF_operation_is restarted if the_lens moves out of the in-focus_position after the lens was once_fixed (locked) at the in-focus position. In_this case, the previous in-focus operation_must be released and a_new in-focus_operation carried out. Accordingly, the_above camera has_disadvantages involving_manual operability and_speed.
Japanese Unexamined Patent Publication No. 58-120225,_entitled "camera" and_published on July 18, 1983, discloses_a_camera having a_one-shot_AF_mode and_a servo AF_mode._In the_one-shot_AF mode, the exposure control is_effected_on the basis of the averaged light-measuring_data stored in a_memory_by the shutter release_operation after fixing the lens_at the in-focus position. In the_servo AF_mode, the_exposure control is effected on the basis of the spot metering_data. Upon pushing down the release_button to a first_stage, the_lens_is fixed regardless_of_whether the_lens is in or out of the_in-focus position,_and the spot metering data is_stored. The exposure control_is_effected on the basis of the_stored spot metering data when the_release button is pushed down_to_a_second stage. Namely, the averaged_light-measuring data in the one-shot AF_mode and the_spot metering data in the servo AF_mode_are unconditionally used
This type of camera_has_the disadvantages of insufficient exposure control_and_low_operability. In the one-shot AF_mode, the spot metering data against_a main object to be photographed may not provide_sufficient exposure. On_the other hand, in the_servo_AF_mode, when the main object, for example, a moving car,_moves out_the spot metering_area after the averaged light-measuring data has been stored, a_large illuminance (brightness) difference between the stored_data used for calculating the exposure and a current light data_may exist, and accordingly, the picture taken may_be insufficiently exposed. 1. Field of the_Invention
The present invention