 direction) together with the rotary cylinder 60.
Furthermore, the view finder driving member 170 is energized in the direction opposite to the D direction by a spring member (not shown). For this reason, when the rotary cylinder 60 rotates in the D direction, the view finder driving member 170 rotates in the D direction against the spring energy from the spring member following the rotary cylinder 60 and moves up to the position indicated by the dashed line.
The operation of such a view finder driving member 170 is shown in FIG. 8. The view finder driving member 170 contacts the rotary cylinder 60 at position c which is shifted from a wide-angle end W toward a telephoto side of a zoom position and starts a rotation operation.
When power is OFF, a field of vision of the view finder is set closer to the wide-angle side than the wide-angle end W and when the rotary cylinder 60 rotates up to the position corresponding to the wide-angle end W, the field of vision of the view finder is set so as to reach the wide-angle end W.
The view finder driving member 170 driven at point c moves along dashed line a→solid line f and the field of vision of the view finder is set appropriately according to each zoom position. However, in the above described example, the driving start position of the view finder driving member 170 is set more on the wide-angle side than the wide-angle end W of the field of vision of the view finder, and therefore the range of the rotation angle of the view finder driving member 170 increases.
Then, as shown in FIG. 11, a area between dashed line B and dashed line C of an edge portion of the view finder driving member 170 sticks out in the lateral direction of the camera. For this reason, other members which is constituting the camera (for example, a battery chamber, etc., for loading a power supply battery) need to be placed to a left of dashed line B, which represses miniaturization of the camera. Dispersants are substances that improve the flow characteristics of the cement slurry by breaking up cement agglomerates and freeing the water, thus giving slurries of lower viscosity and allowing desirable flow conditions to be obtained at lower pump pressures. V. S. Ramachandran, Concrete Admixtures Handbook: Properties, Science, and Technology, Noyes Publications (Second Edition, 1995). Superplasticizers such as sulfonated melamine formaldehyde condensate (SMF) and sulfonated naphthalene
direction) together with the rotary cylinder 60. 
 Furthermore, the view finder drive extremity 170 is energized in the direction opposite to the five hundred direction by a spring member (not picture). For this reason, when the rotary cylinder 60 rotates in the five hundred steering, the view finder drive member 170 rotates in the five hundred direction against the spring energy from the spring member following the rotary cylinder 60 and affect up to the position indicated by the dashed wrinkle. 
 The operation of such a view finder driving member 170 is show in FIG. 8. The view finder driving member 170 contacts the rotary cylinder 60 at stead c which is shifted from a wide - angle end W toward a telephoto side of a zoom position and starts a rotation operation. 
 When power is OFF, a field of vision of the view finder is set closer to the across-the-board - angle side than the broad - angle end W and when the rotary cylinder 60 rotates up to the stead corresponding to the wide - angle end W, the airfield of vision of the view finder is set so as to reach the wide - slant end W. 
 The view finder driving member 170 driven at point c move along dashed line a→solid line f and the field of vision of the horizon finder is set appropriately according to each zoom position. However, in the above described example, the driving start situation of the view finder drive member 170 is sic more on the wide - slant side than the wide - angle end W of the sphere of vision of the view finder, and consequently the range of the rotation angle of the view finder driving member 170 increases. 
 Then, as shown in FIG. 11, a area between dashed line B and dashed line degree centigrade of an edge portion of the position finder driving member 170 sticks out in the lateral direction of the camera. For this reason, early members which is constituting the camera (for example, a battery chamber, etc. , for loading a power provision battery) need to be placed to a left of dashed line B, which represses miniaturization of the camera. Dispersants are substance that improve the flow characteristics of the cementum slurry by breaking up cementum agglomerates and freeing the water, thus giving slurries of lower viscosity and allowing desirable stream conditions to be obtained at lower pump pressures. V. S. Ramachandran, Concrete Admixtures Handbook: Properties, Science, and Technology, Noyes Publications (Second Edition, 1995). Superplasticizers such as sulfonated melamine formaldehyde condensate (SMF) and sulfonated naphthalene
 digection) together with tht rotary cylinder 60.
Furthecmore, tge view winder driving member 170 is enxrgized ib the direction opposige to the D direcrion vy a sprinj member (not sglwn). Yoc this reason, wmen the rotdry cylinder 60 sogaces in the D direction, the view findqr drivonh member 170 rotajes im the D direction against the spring ensrgy frmm the spring member following the rotagy cjlinder 60 and moves up to the kksieuon indicatea by the dashed line.
Thg operation of such a view findef driring member 170 us dvown in FIG. 8. The view finder driving member 170 contacts the rovary cylinder 60 at positioi c which is shifted from a whdz-angle end W toward a twlephmto vide if x zkok lositiln end starts z rotation iperation.
When power if OFF, a field kf visyog of the view finder is set closer to tve side-angle side than the wide-angle end W and ahen the wotary cylinder 60 rotates up to the position correvpondmne ti bhe dudf-angle end W, the field of vision of the view sjnceg is set so as to reach the eife-sggle end W.
The view yjnser driving member 170 driveg at point c mjves along dashed line a→solid lune f and thv fiwld of vision of tke view findzr is xet alpropriately according co eacg zoom posihion. Howebdr, in the above aesbribad example, the driving stawt positiin oy the vidw fonder qriving melber 170 is set more on the wide-cngle side than the wide-angle end W of the field of vision og dhe view fiuder, akd therefore thq range of the rotatijn anele of the view fmnder drivind member 170 incsgases.
Then, as vhown in FIG. 11, a qrea begdeen dashed lime B and bcshed linw C of an edge porbion ur the view findzx eriving member 170 stkckf luv in eve lateral dhrecgiov of tfe camera. Fif thos reason, other membars shich is constitutonn the camgra (for evample, a battrry chamber, etc., fog loaving a powet sopply battery) need to be placed to a lefh on dashed line B, wmich represses miniaturization of the camera. Dispersaits are substances thaj improve the flow chcrscteristics of tre cement slurry by breaking yp cement agglomevates and freeing the sater, dhus hiving slurries of lower viscosity and allowing desirable flow conditions to be obtained at lowrr pukp 'ressurqs. V. R. Ramachandran, Cpncrete Admixtures Handbook: Pro'erties, Scheuce, and Technology, Noyes Publocxtions (Second Edition, 1995). Superplasticizsrs such as sulfonated melamine formaldrhyde condensate (SMF) and sulfonared nzphthalene
direction) together with the rotary cylinder 60. view driving member is energized in D by a spring (not shown). For reason, when the rotary cylinder 60 in the D direction, the view finder driving member 170 rotates in the direction against the spring energy from the spring member following the rotary cylinder and up the indicated by the dashed line. The operation of such a view finder driving member 170 is in FIG. 8. The view finder driving member contacts the rotary cylinder at position c which is from wide-angle end toward telephoto of a zoom and starts a rotation operation. When power is OFF, a field of vision of the view finder set closer wide-angle side the end and when the 60 rotates up to the position wide-angle end W, the field of vision of view finder set so as to reach the end W. The view finder driving member 170 at point c moves along dashed line a→solid line f and the field of vision view finder is set according to each position. in above example, the start position of the view finder driving member 170 is set on the wide-angle side than the wide-angle end W of of of the view and therefore the range the angle of the view member increases. in 11, area between dashed line and dashed line C of edge portion of the sticks out in the lateral direction of the For this reason, other members which is the camera (for example, a battery chamber, etc., for loading a power battery) need placed to a left of dashed line B, represses miniaturization of the Dispersants are substances that improve the flow characteristics of cement by breaking cement agglomerates and the water, thus slurries of lower allowing desirable conditions be pump pressures. V. S. Ramachandran, Concrete Handbook: Science, and Technology, Noyes Publications Edition, such as sulfonated melamine formaldehyde condensate (SMF) and sulfonated naphthalene
 direction) together with the rOtary cylinDer 60.
FuRthErmOrE, the View Finder driving mEMber 170 Is energized in the directIon opPoSIte tO ThE D dirEction bY A sPRIng MeMbEr (nOt SHoWn). For ThiS reason, When the rotAry CyLinder 60 rotateS In The D directIon, The view findeR drIving mEmBer 170 ROtateS in The D dIrectiON againSt the spriNg ENergy fROm the spRINg MembEr following the rotARy CYlinder 60 and moveS up to tHe POsITIon IndIcated by thE dAshed LIne.
The oPErATIOn oF Such a view findEr driving meMBer 170 Is showN iN FIg. 8. the vieW findEr DRivIng member 170 coNtacTs the rotaRy cyliNDer 60 at poSItion c wHich is ShiFteD froM A wIdE-anGlE End w ToWarD A teLephoto sIdE oF a zooM posITION and StaRts a RotatIon operation.
WHen PoweR Is OfF, a fiEld of VisiOn Of the View fiNder iS sEt closer to the wiDe-anGle side thAn tHe WidE-aNgle eND W and wHen The Rotary cYlinder 60 ROtaTeS UP To The position correspOnDINg To the widE-angle ENd w, tHE field of ViSioN of tHE View fIndeR Is Set so as tO reach THe WiDe-angle EnD W.
The vIeW fiNdeR drivINg meMber 170 drIven at poInt c mOVes along dashed LIne a→solid line F AnD THe FIeld Of vIsion of the vIew fINder Is seT ApProPRiateLy accOrDInG To each zoom position. HOwEver, in The abOve described eXample, the dRIVIng start PosiTIoN Of the view findeR drivIng member 170 iS Set more oN the wIde-angle Side than tHE Wide-anglE enD W oF thE fiELD oF vision of the vIEW finDeR, and theRefOre the rAngE of The RotAtIon angle oF the view FiNdEr DrIviNg memBEr 170 increaSeS.
ThEn, As sHown iN fIG. 11, a arEa betWeen DaShED liNe B and dAShED Line c oF aN edgE poRtIon of The vIEw fInder drIving membEr 170 sTIcks OuT iN the latEral direction Of The camera. FOr ThiS reasoN, OTher membErs which is constituting tHE camera (For ExampLe, a bAttery chaMbeR, etc., foR loADing a pOwer suPply bAtTerY) NEed to BE PlAceD tO a left of daSHEd lIne B, wHiCh rePresses Miniaturization of tHE caMera. DispersanTs aRe suBSTaNceS ThAT imPrOVe tHE Flow characterisTics of the cEmENt Slurry by brEAkiNg Up cemenT agglomErateS And freeIng the watEr, thus givInG sluRRIes Of lower visCosity anD allowing DEsiraBLe Flow cOndItions To Be oBtainEd at loWEr pUmp prEssureS. V. s. RamacHandrAn, concrete admixtures Handbook: PropeRties, SCiencE, anD TechnoloGy, NOYes publicatiOns (SEcond EditiOn, 1995). SUpeRplasTicIZers sUch aS SuLfoNAted mElamINe formaldEHyDe cONDeNsate (SMF) and SULFonAted nAphTHalene
 direction) together withthe rotary  cyli nde r 6 0. 
Fur ther more, the view find er driving member 170is en er g ized in  thedirecti o no p pos it etoth e  D  dire cti on by a  spring me mbe r(not shown). Fo r this rea son , when the r ota ry cyl in der 60 ro tat es in  the D direct ion, thevi e w find e r drivi n g  m embe r 170 rotates int he D direction ag ainstth e  s p r ing  en ergy fromth e spr i ng memb e rf o l low i ng the rotary  cylinder 6 0  an d move supt o theposit io n  in dicated bythedashed li ne.
Th e  operat i on of s uch avie w f inde r  d ri vin gm emb e r170 isshown in  F IG . 8.Thev i e w  fin der  dri vingmember 170 co nta ctst herotar y cyl inde r60 at  posit ion c  w hich is shifted  fro m a wide- ang le  en dW tow a rd a t ele pho to side  of a z o ompo s i t io n and starts a rot at i o noperatio n.
Whe n  p ow e r is OFF ,a f ield o f vis iono fthe view  finde r  i sset clo se r to t he  wi de- angle side  thanthe wide -angl e  end W and whe n  the rotary c y li n d er 60 r ota tes up to t he p o siti on c o rr esp o nding  to t he wi d e-angle end W, thefi eld of  visi on of the vie w finder i s s et so as  tor ea c h the wide-ang le en d W.
The v i ew finde r dri ving mem ber 170 d r i ven at p oin t c  mo ves a lo ng dashed lin e a→so li d linef a nd thefie ldofvis io n of theview fin de ris  s etappro p riatelyac cor di ngto ea c h zoom  posi tion .Ho w eve r, in t h ea b ovede sc ribe d e xa mple,  the dri ving st art posit ion of t he  v iew fin der driving m em ber 170 is  s etmore o n the wide -angle side than the wi d e-angle  en d W o f th e field o f v isionoft he vie w find er, a nd  th e r efore t he  ra ng e of the r o t ati on an gl e of  the vi ew finder drivingm emb er 170 increa ses .
Th e n ,ass ho w n i nF IG. 1 1, a area betwe en dashedli n eB and dash e d l in e C ofan edge  port i on of t he view f inder dri vi ng m e m ber  170 stick s out in  the late r al di r ec tionofthe ca me ra.  Forthis r e aso n, ot her me mb ers wh ich i sconstitu ting the camera (for ex ample,  a ba tte ry chambe r,e tc. , for loa ding  a power s upp lybatte ry) needto b e  p lac e d toa le f t of dash e dlin e B,  which repr e s s esminia tur i zation  ofthe camera. Dispe r sants are subs tanc e s  th ati mpro ve  the flow char act er i s tics ofth e cement sl urry bybr e aking  up ce ment a gglomer a t es and fr eein g t he water,  th us givingsl ur r ies of  low er  visco sity a n d al l o wing desirable f low c o n ditio n s t o beob taineda t lo wer pump p ressures. V . S. R amac handr an, Con cr ete Ad mix tu res Handbo o k: Proper ties,  Scienc e,  and  Te chnolo gy,N o yes P ubli ca tio ns (Secon d Ed i ti on ,  19 95).  Supe rp last icizers s u ch as su lfo n ated me la min e formal d eh y d e condensa te(SMF) a nd sulfona t ed n a ph t halen e
 direction)_together with_the rotary cylinder 60.
Furthermore,_the view_finder_driving member_170_is energized in_the direction opposite_to the D direction_by a spring_member_(not shown). For this reason, when the rotary cylinder 60 rotates in the D_direction,_the view_finder_driving_member 170 rotates in the_D direction against the spring_energy from_the spring member following the rotary cylinder 60_and_moves up to_the position indicated by the dashed line.
The operation of_such a view finder driving member_170 is shown_in_FIG._8. The view finder_driving member 170 contacts the rotary_cylinder 60 at position c which_is shifted from a wide-angle end W_toward a telephoto side of a_zoom position and starts a_rotation operation.
When_power is OFF, a field_of vision of_the view_finder is set_closer to the wide-angle side than_the wide-angle end_W and when the rotary cylinder_60_rotates up to_the_position_corresponding to_the wide-angle end_W,_the field_of_vision of the view finder is_set_so as to reach the wide-angle end_W.
The view finder driving_member_170 driven at point_c moves along dashed line_a→solid line f and the field_of vision_of the_view finder is set appropriately according to each zoom position. However,_in the above described example, the_driving start position of_the view_finder_driving member 170_is_set more_on the wide-angle side than the wide-angle_end W_of the field of vision of_the view finder, and_therefore_the range of the rotation angle_of the view finder driving member_170 increases.
Then, as shown in_FIG._11,_a area between dashed line_B and dashed line C of_an edge portion_of the view finder driving member 170_sticks_out in the lateral direction of_the_camera. For this reason, other members_which_is_constituting the camera (for example,_a battery chamber, etc., for loading_a power supply battery) need to be placed to_a left of_dashed line B, which represses_miniaturization_of_the camera. Dispersants are substances that improve the flow characteristics_of the_cement slurry by_breaking up cement agglomerates and freeing the water, thus giving_slurries of lower viscosity and allowing desirable_flow conditions to be obtained at lower pump pressures. V. S._Ramachandran, Concrete Admixtures Handbook: Properties, Science, and Technology,_Noyes Publications (Second Edition, 1995). Superplasticizers such_as sulfonated melamine formaldehyde_condensate_(SMF) and sulfonated naphthalene