宾得pentaxmx胶片机说明指导书彩色英文版

AsahiPentaxMX

posted2-29-'04

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TopofForm

BottomofForm

Backtomaincameramanualpage

SMCPentaxlensesandPentaxaccessoriesareengineeredandproducedmeticulouslytopreciseAsahiPentaxspecifications.Lensesandaccessoriesfromothermanufacturersarenotproducedtotheseprecisespecificationsand，therefore，maycausedifficultieswith-oractualdamageto-aPentaxcamera.AsahiPentaxcannotassumeanyresponsibilityfordifficultiesresultingfromtheuseofanyotherbrandoflensesoraccessorieswithanAsahiPentaxcamera.

CONTENTS

Nomenclature

2

Specifications

4

LensMounting

6

InsertingBatteries

7

BasicOperatingInstructions

8

FilmLoadingandWinding

10

SettingASAFilmSpeed

11

SettingtheShutterSpeedDial

12

ComposingandFocusing

13

ExposureMeasurement

14

HoldingtheCamera

15

UnloadingFilm

16

FlashSynchronization

18

Depth-of-FieldPreviewLeverandScale

20

Depth-of-FieldTable：SMCPentax-M50mmf/1.4Lens

21

MeterCouplingRange

22

HelpfulHintsonExposureProblems

23

DualControlExposureSystem

23

ShutterButtonLock

24

ManualShutterOperation

25

Self-timer

26

Infra-redPhotography

27

MultipleExposure

28

InterchangeableFocusingScreens

29

UsingScrew-mountTakumarLenses

30

Open-apertureandStop-downMeteringLenses

32

ResistancetoTemperatureExtremesandChanges

33

CameraMaintenance

34

WarrantyPolicy

36

1.Exposurecounter

2.Shutterbuttonlocklever

3.Shutter-cockedindicator

4.Shutterreleasebutton

5.ASAwindow

6.ASAdiallockbutton

7.Shutterspeeddial

8.Shutterspeedindex

9.Rapid-windlever

10.Apertureread-outprismwindow

11.HotshoeXcontact

12.Filmrewindknob/Backcoveropener

13.Filmrewindcrank

14.Lensreleaselever

15.Self-timerlever/Depth-of-fieldpreviewlever

16.Upraisedalignmentdot

17.Focusingring

18.Distancescale

19.Aperture/Distanceindex

20.Depth-of-fieldscale

21.Aperturering

22.X-syncterminal

23.FP-syncterminal

24.Neckstrapring

25.Viewfindereyepiece

26.Filmpressureplate

27.Guidepinchannel

28.Winder/MotorDrivedirectcontactterminal

29.Filmchamber

30.Batterychamber

31.MotorDrive/Tripodreceptacle

32.Filmrail

33.Filmguiderail

34.Shuttercurtains

35.Filmrewindbutton

36.Filmtransportcoupler

37.Bulkmagazineguidepinchannel

38.Sprockets

39.Filmtake-upspool

40.Backcover

SPECIFICATIONS

Type

35mmfull-frameSLRcamerawithopen-aperturecenterweighted

Lensmount

Through-The-Lensmeter.

PentaxKbayonet.

Standardlenses

SMCPentax

50mmf/1.2

SMCPentax-M50mmf/1.4

SMCPentax-M50mmf/1.7

SMCPentax-M40mmf/2.8

Shutter

Horizontal-run，rubberizedsilkfocal-planeshutter；speedsfrom1

Flashsynchronization

to1/1000sec.plusB；shutterlockand"Cocked"indicator.

FPandXsockets，plushot/coldaccessoryshoeforXcontact；1/60

sec.Xsynchronization.

Self-timer

Delaysshutterreleaset04-12seconds；self-timerstarterbuttonprovided.

Viewfinder

Silver-coatedpentaprismfinder；split-imagemicroprismfocusingscreen(8interchangeablescreens)；95%ofpicture-takingareavisible

and0.97Xmagnificationwith50mmlensatinfinity)；-1.0diopter

eyepiece.Informationviewfindershowsf/stop，shutterspeedand

tri-coloredLEDread-outdots.CorrectionlensadaptorM，Magnifier

MandRefconverterMfittheviewfinderframe.

Mirroranddiaphragm

Instantreturnmirrorandautomaticdiaphragm.Depth-of-fieldpreviewwithself-timerlever.

Filmwindandrewind

Ratchet-typerapidwindlever，plastic-tippedforwindingcomfort.

162°throwwithastand-offangleof20°.Rewindcrankfor

speedyfilmrewind.

Filmloading

Newmagic-needlequick/sureloading.

Automaticwinder

MXcamerabodyacceptsWinderMXforupto2frames-per-second

Exposurecounter

(single-frameandconsecutiveexposureoperationpossible)and

MotorDriveMXforupto5framespersecond(single-frameand

consecutiveexposureoperationpossible)，forautomatic，speedy

filmwindandshuttercocking.

Automaticresettype.

Exposuremeter

Open-aperture，center-weightedThrough-The-Lensmeter，with

Powersource

GPDcellsforfastlightresponse，withtri-coloredLEDexposure

read-out，rapidwindleverandshutterreleasebuttonactingasmeter

switch.Exposurerange：EV1-19(ASA100，f/1.4)，Filmspeed

range：ASA25.1600.

Two1.5Vsilveroxidebatteries(G13)；LED'sdoubleasbatterychecklamp.

Backcover

Standardbackwithmemoholder，interchangeablewithMagazine

Bodysize

BackMX，DialDataMXfordatarecordingonfilm.

135.5mmx82.5mmx49.5mm.

Bodyweight

495grams.

LENSMOUNTINGINSERTINGBATTERIES

1.Removetherearlensandbodycaps.

2.Matchthereddotonthecamerabodywiththereddotonthelens.Insertthelensintothebodyandturnitclockwiseuntilthelenslockswithaclick.

3.Inthedark，whenthereddotsaredifficulttosee，aligntheupraisedwhitedotonthelensbarrelwiththelensreleaseleverbytouch.Thenturnandlockasabove.

4.Todetach，holdthecamerawithyourlefthand.Depressthelensreleaselever

whileturningthelenscounterclockwisewithyourrighthand.

CAUTION:

Ifyouhavetoputthelensdownwithouttherearlenscap，placeplaceitfront-elementdownneverfrontelementup.

BATTERIES

Twosilveroxidebatteriesarepackedseparately.Besuretoinsertthemintothebatterychamberbeforeoperatingthecamera.

CAUTION:

Thebatteryislikeaphonographrecord，itcanbedamagedbyskinacids.Handlebytheedgeswithadryclothbeforeinsertionintothecamera.Alsobeespeciallysuntowipeoffthebatterywithaclothwhentheyaresalted.ThebatteryisnotrechargeableDonotthrowadeadbatteryintoafire，asitmayexplode.Alsokeepitbeyondthereach

children.

INSERTION：Openthebatterychambercoverwithacoin.Insertthetwobatteriesintothebatteryholderofthecoverasshownabove，eachwith(+)sidefacingup.

CHECK：Onesetofbatterieswilllastaboutoneyear，oroperatetheshutterabout10,000times.Tocheckbatterylife，depresstheshutterreleasebuttonhalfway，whilelookingthroughtheviewfinder.Ifthebatteriesaredead，theLEDdotswillnotglow.Forreplacement，use

EvereadyS76EorMalloryMS76Horequivalent.

BASICOPERATINGINSTRUCTIONS

1.SetFilmSpeed

Whiledepressingthetinybuttonatoptheshutterdial，turntherimoftheshutterdialuntiltheASAnumberofthefilmyouareusingiscenteredintheASAwindow.

2.CockRapid-WindLever

Cocktherapid-windleverallthewayuntilitstops.The"Cocked"indicatorwillturnred，showingthattheshutteriscocked.

3.SetShutterSpeed

Turntheshutterspeeddialuntilthespeedyouwanttouseisoppositetheindexmark.Generally，youshouldusethefastestpossibleshutterspeedtoavoidblurredpicturescausedbycameramovement.Trystartingwith1/125sec.outdoorsindaylightand1/30sec.indoors.

4.ComposingandFocusing

Whileviewingthroughthefinder，turnthefocusingringuntilyoursubjectcomesintosharpfocusandchoosethemostpleasingcomposition.

5.TurnonExposureMeterandRotateApertureRing

Pullouttherapid-windleverslightly(20°)anddepresstheshutterreleasebuttonhalfwaytoturnontheexposuremeter.Thepreselectedshutterspeedplusthetwoadjacentspeeds("60"and

"250"inthecaseof"125")arevisibleontheright-handsideoftheviewfinder.TurntheapertureringuntilthecentralgreenLEDdotglowswhichindicatesproperexposure.(Thef-stopyouhaveselectedisalsovisibleinthesmallwindowabovethefocusingscreen).Ifthecentralgreendotdoesnotglownomatterhowfaryouturntheaperturering，changetheshutterspeed.

6.ReleaseShutter

Holdyourcamerafirmlyandtriptheshutter.Thencocktherapid-windleverforthenextpicture.(Aslongastheleverisatitspre-advanceangle，thelightmeterstaysON.Ifyoupushitbacktothecompletelyclosedposition，themeteristurnedOFF.)

FILMLOADINGANDWINDINGSETTINGASAFILMSPEED

1.Openthebackbypullinguptherewindknobuntilthebackopens.

2.Placethefilmcartridgeinthefilmchamber，andpushdowntherewindknob.Insertthefilmleaderinbetweenanyofthewhiteplasticpinssurroundingthefilmtake-upspool.

3.Advancethefilmbyalternatelyadvancingtherapidwindleveranddepressingtheshutterbuttonuntilbothtopandbottomsprocketsengagethefilmperforations.Closethebackbypressingitfirmly.

4.Cocktherapid-windlever，andconfirmthatthefilmrewindknobturnscounterclockwise，indicatingthatthefilmisproperlyloadedandismovingfromcartridgetotake-upspool.Triptheshutter.Advancethefilmuntiltheexposurecounterturnsto"1"，indicatingthatthefirstpictureisreadytobetaken.

SETTINGTHEASAFILMRANGE

MEMOHOLDER

Asareminderofthetypeoffilminyourcamera，tearoffthetopofthefilmboxandinsertitintotheMemoHolderonthebackofthecamera.

TheASAfilmspeedratingofall35mmfilmsisgiveninthedatasheetpackedwitheachrolloffilm.ThehighertheASAnumber，themoresensitivethefilmistolight.WhiledepressingtheASAdiallockbutton，turntherim

oftheshutterdialuntiltheASAnumberofyourfilmisalignedwiththeindexmark.

BesuretosettheASAfilmspeedbecauseitiscoupledtotheexposuremetersystem.

SETTINGTHESHUTTERSPEEDDIALCOMPOSINGANDFOCUSING

Turntheshutterspeeddialclockwiseorcounter-clockwisetotheshutterspeeddesired.Theshutterspeedmaybeseteitherbeforeoraftercockingtherapid-windlever.Asyoucocktheshutterbyturningtherapid-windlever，the"cocked"indicatorturnsredshowingthattheshutteriscocked.Thecolorofthecockedindicatorchangestoblackaftertrippingtheshutter.ForuseoftheXsettingontheshutterspeeddial，refertopage18.

WiththeshutterspeeddialsetonB(bulb)，theshutterwillstayopenaslongasyoudepresstheshutterbutton.Asyoureleaseyourfingerfromtheshutterbutton，theshuttercloses.Whenalongexposureisdesiredwhileusingthe8setting，settheshutterbuttonlockbymovingthelevertotheleft(an"L"becomesvisible)whiledepressingtheshutterbutton.Alternately，useacablereleasewithalockingdeviceforatimeexposure.

CAUTION:

Atlongspeeds，longerthan1/30(1/15-1sec.)supportyourcamerarigidlytopreventcameramovement.Toprotecttheshuttermechanism，triptheshutterbeforeputtingthecameraawayforanyextendedperiod.

COMPOSINGANDFOCUSING

ThestandardfocusingscreenofyourMXhasacentralsplit-imagecirclesurroundedbyamicroprismcollar.Whilelookingthroughtheviewfinder，turnthefocusingringuntilyoursubjectcomesintosharpfocus.Ifyoursubjectisnotinfocus，theimageinthesplit-imagecirclewillappeardividedintoupperandlowerportions，andtheimageinthemicroprismcollarwillappearbrokenintomanysmallfragments.

EXPOSUREMEASUREMENT

Whentherapid-windleverispulledout20°andtheshutterbuttonisdepressedhalfway，theexposuremeteristurnedON.TurntheapertureringtogetaproperLEDexposureread-outintheviewfinder.

Ontheright-handsideoftheviewfinder，appearthepreselectedshutterspeedplustwoadjacentspeeds(e.g."60"and"250"inthecaseof"125")onatransparentdiskwhichprotrudesslightlyintothefocusingscreenarea.

Ontheright-handsideoftheshutterspeedsshown，thereare5LEDdotswhicharenormallynotvisible.Ifyoudepresstheshutterbuttonhalfwayandtheexposureiscorrect，thecentralgreendotwillilluminate.Iftheexposureis1/2EVover，theorangedotnextto"250"(intheaboveexample)willglow；aswillthedotnextto"60"inthecaseof1/2EVunderexposure.Ifitis1EVormoreoverorunder，theappropriatereddotwillglowasawarningforadjustmentofeitherthef-stoportheshutterspeed，unlessyouwanttomakeintentionaloverorunderexposure.

Asageneralrule，yourcameracanbeheldmorefirmlyinthelefthand，whichdoesnotreleasetheshutter.Ifyouholdyourcamerawiththerighthand-thehandthatreleasestheshutter-thismaycausecameramovement.Often，blurredpicturesareduetocameramovement.

HOLDINGTHECAMERA

Horizontalposition

Holdthecamerafirmlywithyourlefthand，anddrawyourarmsclosetoyourbody

Verticalposition

Holdyourcameratightlytoyourforeheadwithyourlefthand，anddrawyourrightarmclosetoyourbody.

Verticalposition

Holdyourcameratightlytoyourforeheadwithyourlefthand，raiseyourrightarmanddrawyourleftarmtoyourbody.

UNLOADINGFILM-AVOIDDIRECTLIGHTWHENUNLOADINGTHEFILM

Afterthefinalpictureontherollhasbeentaken，therapid-windleverwillnotadvancefurther，indicatingthatthefilmmustberewound.Liftuptherewindcrank.Depressthefilmrewindbuttonandturntherewindcrankasindicatedtorewindthefilmintoitscartridge.Rewinduntilthetensiononthecranklessens，indicatingthattheleaderendofthefilmhasbeenreleasedfromthetake-upspool.Pulloutthefilmrewindknob(thebackwillopenautomatically)，andremovethefilmcartridge.

FLASHSYNCHRONIZATION

TheMXhasFPandXterminalsonthefrontofthecamerabody，andaseparateXcontactonthebuilt-inhotshoe.Thetableonthenextpageshowswhichflashcontact，whichshutterspeedandwhichflashbulbmaybecombinedformaximumlampefficiency.Unlessthesecombinationsarerigidlyfollowed，therewillbeafailureinflashsynchronization.Notethe"X"settingisexactlyatthe60markontheshutterspeeddial.Thisindicatesthehighestshutterspeedatwhichelectronicflashunitsmaybeused.UsethehotshoeflashcontactwhenusingashoemountelectronicflashlikethePentaxAutostrobwhichhasaflashcontactontheshoebracket.Whenusingthehotshoe，thereisnoneedtoplugtheflashcordintotheXterminalonthefrontofthebody.Thehotshoeflashcontactturnsto"hot"(switchedon)onlywhenyouinsertashoemountelectronicflash.Itremains"cold"(disconnected)evenwhenusinganelectronicflashwithitscordpluggedintotheXterminalonthebodyfront.Thiseliminatesthedangerofelectricshocks.

Therearebasicallytwotypesofflashbulbattachmentsonthemarket：clip-ontypesandbrackettypes.Eithercanbeusedwithyourcamera.Theclip-ontypesareattachedtothehotshoeandthebrackettypesareattachedviathetripodsocket.

Useoneofthesethreebulbtypes：M，MForFP.Thecorrectterminalandthecorrectshutterspeedtouseforeachofthesethreetypesareoutlinedinthetablebelow.Beforeattachingtheflashunittothecamera，youmustremovetheprotectiveplugfromtheproperterminal.Whennotusingtheterminals，keeptheplugsinserted.

DEPTH-OF-FIELDPREVIEWLEVERANDSCALE

Depthoffieldistherangebetweenthenearestandfarthestdistanceswhichareinfocusatagivenlensaperture.Ifyouwanttoknowhowgreatthedepthoffieldisatacertainaperture，focusonasubjectandlookthroughtheviewfinderwhilemovingtheSelf-timerlevertowardthelens，andyouwillbeabletopreviewthedepthoffield.

Or，afterfocusing，lookatthedepth-of-fieldscaleonthelens.Inthephotographbelow，thedistancescaleissetat5meters；thatis，thelensisfocusedonasubject5metersaway.Thecalibrationsoneachsideofthedistanceindexcorrespondtothediaphragmsettingandindicatetherangeofin-focusdistancefordifferentlensapertures.Forexample，ifalensopeningoff/4istobeused，therangeonthedistancescaleringcoveredwithinthefigure4onthedepth-of-fieldscaleindicatestheareainfocusatthatlensopening.Youwillnotefromthedepth-of-fieldscaleinthephotographthattherangefromapproximately4to7misinfocus.Notethatasthelensaperturechanges，theeffectivedepthoffieldalsochanges.Forthedepthsoffieldatdifferentaperturesanddistances，refertothenextpage.

METERCOUPLINGRANGE

TheexposuremeteroftheMXmeasuresthebrightnessofthegroundglass.Therefore，theproperLEDexposureread-outshouldbeobtainedafteryouhavefocusedyoursubjectonthegroundglass.Thegreenareainthetableindicatesthecouplingrangeofthemeter，andshouldnotbeinterpretedasthecamera'stotalrangeoff/stop-shutterspeedcombinations.Asyouwillnotefromthetablebelow，withASA100film，youmayuseanyshutterspeedfrom1sec.to1/1000sec.incombinationwithanyaperturethatwillilluminatethegreenLEDintheviewfinder.Thetotalrangeoftheaperturesettingsis，ofcourse，determinedbytheminimumandmaximumaperturesofthelensbeingused.Forexample，withthe50mmf/1.4lensandASA100film，anaperturefromf/1.4(themaximumapertureofthislens)tof/22(theminimumaperture)maybeusedwithanyshutterspeedfrom1sec.to1/1000sec.thatwillilluminatethegreenLED.

1.Asexposuremeasurementsmadeat1/1000sec.with25ASAfilmwillnotbeaccurate，exercisecaution.

2.Whenusingthe50mmf/1.4lens，accurateexposuremeasurementatthepointsfoundintheshadedareaintheabovetablecanbeguaranteedonlywhenusinguptof/16(f/1.4-f/16).

HELPFULHINTSONEXPOSUREPROBLEMS

TheexposuremeterbuiltintoyourMXtakesacenter-weightedreadingfromtheentiresceneasseenthroughtheviewfinder.Sometimes，however，thereisagreatdifferencebetweenthelightreflectedfromthebackgroundandthelightreflectedfromthesubject.Insuchacase，toachieveareallygoodphoto，youmustcompensateforthedifferencebyopeningorclosingdowntheaperture1or2stops.Asageneralrule，whenthesubjectisdarkerthanthebackground，youcompensatebyopeningyouraperture1or2stopsmore.Forexample：onabrightday，whenyoursubjecthashisbacktothesunandyouareshootingdirectlytowardthesun...orwhenyouareshootingasubjectagainstsnoworlight-coloredsand...orwhenyouarecopyingapageofblacklettersonwhitepaper，increasethesizeoftheaperturesomewhat.Whenyoursubjectisbrighterthanthebackground-ifheisstandinginaspotlight，forexample-youmaketheaperture1or2stopssmallertocompensate.

DUALCONTROLEXPOSURESYSTEM

Sinceboththeapertureandshutterspeedareindicatedwithintheviewfinder，youcancontrolexposurebyadjustingeithertheshutterspeeddialortheaperturering.Whentheaperturesizeisthemostimportantfactor，settheaperturedesiredbyturningtheaperturering.ThenadjusttheshutterspeeddialuntilthegreenLEDilluminates.

Whenshutterspeedisthemoreimportantfactor，turnthedialtothespeedyoudesire.ThenadjusttheapertureringuntilthegreenLEDilluminates.

SHUTTERBUTTONLOCK

TheshutterbuttonlockleverisforyourconveniencewhileyouaremakingaparticularlylongexposureusingtheBshutterspeedsetting.Afterdepressingtheshutterbutton，turnthelocklever(whichisonthecollaratthebaseoftheshutterbutton)sothattheletter"L"isvisible.Whentheexposuretimeisup，movethelockleverbacktoitsoriginalposition.Thisautomaticallyreleasestheshutterbutton.Inadditiontomaking"Time"exposure，thelockleverisalsousedtoturnoffthemetercircuitandsimultaneouslypreventaccidentalreleaseoftheshutter.

MANUALSHUTTEROPERATION

ThetwosilveroxidebatteriesinyourMXareusedonlyforpoweringtheexposuremeter；theshuttermechanismisatotallymanualoperation.Therefore，yourcameracanstillbeoperatedevenifthebatterieshavewornout.Ifthebatterieshavewornoutandtheexposuremeterisnolongerfunctioning，youmustdeterminethecorrectcombinationofshutterspeedandaperturesizeyourself，fromyourownexperience.Also，packedinwithmosttypesof35mmfilmisadatasheetwithsuggestionsfordeterminingthecorrectexposureinavarietyofsituations.

SELF-TIMER

TheSelf-timerdelaystheshutterreleaseby4-.12seconds，dependinguponhowfarcounterclockwise(whencamerafacesyou)theleverisadvanced.WhenusingtheSelf-timer，donotdepresstheshutterbutton...itwillimmediatelyreleasetheshutterwithoutdelayedaction.Aftercockingtherapid-windlever，advancetheSelf-timerlever

90°-180°.Then，pushthestartbutton，andtheSelf-timerwillcommence.

INFRA-REDPHOTOGRAPHY

Ifyouintendtotakeinfra-redphotographs，remembertousetheinfra-redmarkindicatedwithanorangelineonthedepth-of-fieldscale.First，bringyoursubjectintosharpfocus.Thendeterminethesubject-to-cameradistancefromthedistancescaleonthelens.Thenmatchyoursubject-to-cameradistancetotheinfra-redmarkbyturningthefocusingringaccordingly.

Forinstance，ifyoursubjectisinfocusatinfinity，turnthefocusingringandmovetheinfinity(00)marktotheinfra-redmark.

NOTE：Aninfra-redfocusingadjustmentisnotrequiredwhenworkingwithinfra-redcolorfilm.

MULTIPLEEXPOSURE

Fordeliberatemultipleexposures，makethefirstexposureinthenormalway.Thentightenthefilmbyturningtherewindknob

，andkeepholdoftherewindknob.Depressthefilmrewind

releasebutton

andadvancetherapid-windlever.Thiscockstheshutterwithoutadvancingthefilm.Finallyreleasetheshuttertomakethesecondexposure.Thenmakeoneblankexposure，beforetakingthenextpicture，toavoidoverlapping.Astheexposurecountercontinuestofunctioneachtimetheshutteriscocked，adoubleexposurewillbecountedastwoframes.

INTERCHANGEABLEFOCUSINGSCREENS

Inadditiontothestandardsplit-image+microprismfocusingscreen，thereare7otherinterchangeablefocusingscreensavailableforyourMX.

Toremovethestandardfocusingscreen，pullthescreenretainerpin

towardyouwiththepincettesuppliedwiththeinterchangeablefocusingscreen.Thefocusingscreenwillthenflipdown.Removethescreenfromtheframebygraspingtheprotrudingportionofthescreenwiththepincette.

Toinstallthescreenofyourchoice，placeitonthescreenframe，pushingitbacktotheoriginalpositionuntilitlockswithaclick.Toremovedustparticlesfromthescreen，neverwipeitwithacloth，orthelike，butjustuseablower.

USINGSCREW-MOUNTTAKUMARLENSES

Conventionalscrew-mountTakumarlenses(bothSuper-TakumarandSMCTakumar)canbeeasilymountedontoyourcamerabyattachingthemfirsttoaMountAdaptorK.However，whenAdaptorKisused，thefollowingistrue：

1.Duetothedifferenceincouplingsystems，theautomaticdiaphragmwillnotfunction.

2.Full-aperturemeteringlenseswillfunctionasstop-downmeteringlenses.

HowtoUseMountAdaptorK

1.ScrewtheconventionalTakumarlensintotheMountAdaptorK.

2.AttachtheAdaptor/lensunittothecamerabodybyaligningthereddotsand，andturningthelensclockwiseuntilitlockswithaclick.(Thistakesslightlylessthanaquarterofarevolution.)

3.Toremovethelens，leavingtheMountAdaptorKattachedtothecamerabody，simplyunscrewthelenscounterclockwise.Otherscrew-mount

Takumarlensescanthenbeattachedinthenormalway.

ToremovetheMountAdaptorKfromthecamerabody，firstremovethescrew-mountlens.Thenpress，withyourthumbnailorapointedobjectsuchasaballpointpen，againstthespringpin

TurntheMountAdaptorKcounterclockwiseuntilyoufeelitrelease，andtakeitout.

SincethemechanismforlockingintheMountAdaptorKistotallydifferentfromthatwhichlocksinanSMCPentaxbayonet-mountlens，thelensreleaseleveronthecamerabodyplaysnopartatall.

OPEN-APERTUREANDSTOP-DOWNMETERINGLENSES

Open-apertureSMCPentaxlenseshaveadiaphragmcouplinglever

onthebackofthelenswhichcoupleswiththecamerabodytopermitopen-aperturemetering.Theultratelephotosdonothaveadiaphragmcoupler，sotheymustbeusedwiththestop-downmeteringsystem.UseoftheAuto-ExtensionTubeSetKpermitsopen-aperturemetering.

UseofotherKSeriesaccessories-standardExtensionTubeSetK，HelicoidExtensionTubeK，Auto-BellowsKandBellowsUnitK-requiresstop-downmetering.WheneveranyoneoftheseisusedbetweenthecamerabodyandanSMCPentaxlens，thestopdownmeteringsystemmustbeused.

RESISTANCETOTEMPERATUREEXTREMESANDCHANGES

Thetemperaturerangeatwhichyourcamerawillcontinuetofunctionproperlystretchesfrom50°Cto-20°C.However，resistancetocoldcouldbehamperedbyoilwhichhasbecomedirty.Therefore，ifthecameraistooperateatfullefficiencyinverycoldconditions，itmustbeoverhauledandalloilmustbereplaced.Suddenchangesintemperaturewilloftencausemoisturetocondenseinsideoroutsideyourcamera.Thisisapossiblesourceofrust，whichmaybeextremelydamagingtothemechanism.Furthermore，ifthecameragoesfromawarmtemperaturetoasub-freezingone，andiftinydropsofmoisturefreeze，furtherdamagemaybedonebytheirexpansion.

Thus，suddentemperaturechangesshouldbeavoidedasmuchaspossible.Asaguide，atemperaturechangeof10°Cshouldbeallowedtotakeplacegraduallyoveraperiodofatleast30minutes.Ifthisisnotpossible，keepingthecamerainitscaseorbagwillhelpsomewhatinminimizingtheeffectsofarapidtemperaturechange.

Extremelylowtemperaturereducestheefficiencyofthebattery.Th