MINOLTA X-570 Use and Maintenance Manual
Contents
1. OWNER S MANUAL X 570 MINOLTA EM E Before using your camera for the first time study this manual carefully all the way through or at least all the sections covering your photo graphic needs As you read attach a lens load batteries turn the main switch on and handle your X 570 to acquaint yourself with its parts and features Then load it with film and proceed to actual picture taking In this way you can take good photos and begin to realize the broad potential of your X 570 right from the start To obtain many years of service from your X 570 be sure to read and follow the precautions given on page 8 and elsewhere Keep this manu al for reference later as neces sary Your Minolta X 570 is a microcomputerized single lens reflex SLR camera with quartz con trol of mechanical sequences providing lasting accuracy In its aperture priority auto exposure AE mode the X 570 automatically sets the shutter speed over a stepless range for correct exposure at the aperture you selected If desired audible beeps will be given to guard against blur from subject camera movement and an AE lock can be used to hold a meter reading and then readjust the framing before releasing the shutter By choos ing a suitable aperture you can control the depth of field to render the full scene sharp or to separate your subject from its surrounding2. engaged movement Rewind crank Film speed ring Flash control contact Camera control contact For off film TTL auto con Film speed ring release For flash ready signaling and trol with PX series Auto auto X sync setting with PX Electroflashes 4 Sync contact and X series Auto Electroflashes Film speed window AE lock self timer switch Lens mounting index AE lock for holding close up or adjusted viewing meter readings and for slow shutter flash Electronic self timer with triple rate blinking LED and optional audible beeps Lens release button Mirror Specially coated to brighten viewfinder Front grip Integral front and back grips I giving camera surer hold 4 Shutter release socket Sync terminal Diaphragm control lever Preview button Spring loaded button for previewing depth of field and for stop down meter Bayonet lens mount ing Integrally lubricated stainless Not visible steel mount for greater durability Silver coated pentaprism for Second silicon photocell in and smoother lens changing brighter viewing mirror compartment for Direct Accepts virtually all Minolta SLR Silicon photocell atop penta Autoflash Metering with PX interchangeable lenses and acces prism for metering ambient series Auto Electroflashes sories light 5 G Focusing grip Q Distance scale Q Depth of field scale Aperture ring scale Mounting index Q Diaphragm
3. control pin G Minimum aperture lock Disengage for use on X 570 M Match LED manual A Aperture priority auto exposure AE Over range LED Blinks at 4Hz Shutter speed scale LEDs Glowing LED indicates stepless speed set by camera in A mode Glowing LEDs indicate metered speed in M mode Blinking 4Hz LED indicates 1 4 sec under range LED DELE 7 510 speed set in M mode Glows if metered speed is 60 LED blinks at 2Hz as between 1 and 4 sec flash ready signal with PX Blinks at 4Hz if outside range and X series Auto Electro Q B setting indicator flashes Q Aperture setting 60 LED blinks at 8Hz as Focusing screen flash distance checker FDC Split image spot microprism with PX series Auto Electro band and Acute Matte field flash exchangeable with eight other screens at authorized Minolta Lens shown 50mm f 1 7 MD service facilities sd Back cover release knob Film cartridge chamber Shutter curtain Horizontal traverse focal plane type Sprocket Take up spool Pressure plate Eyepiece frame eyepiece 9 Memo holder ISO DIN ASA table Back grip Battery chamber cover Q9 Tripod socket Rewind release Accessory connections E Contact terminals for camera control by Multi Function Back and data imprint control with Multi Function Back or Quartz Data Back 1 Motor drive guide socket Motor drive contacts Winder contact Winder motor d
4. from affect ing the meter reading and exposure The eyepiece cap can be thread ed on the camera strap to keep it handy for use 25 FUNDAMENTALS OF EXPOSURE APERTURE CAMERA METERS SUBJECT BRIGHTNESS oe ALL VAVA A VAVAVAVAVAVAVAVA VAVAVAVAVAAVA VAVAVA VA Z VA VAVAVA P 2 Va FILM SPEED Set by user Dark amp SUBJECT BRIGHTNESS Bright za v E AVA A M c T pA N SHUTTER SPEED JL JOINIOOO More light VAVA Tirana O000 O00 0000 More light lt Less light Z Z 5m i When you take a picture light from the subject passes through the lens and open shutter striking the film to form an image To obtain correct exposure for the subject s brightness and film being used the aperture size of the diaphragm opening and shutter speed length of time the shutter curtain is kept open must be controlled As indicated by the aperture diagram next to each f number in the figure large f numbers e g 1 16 and f 8 represent small apertures and small f numbers e g f 2 and f 1 4 represent large apertures Each standard f number setting e g f 8 lets in twice as much light as the next numerical ly larger one f 11 and half as much as the next smaller one f 5 6 This difference in exposure be tween standard f numbers is called one stop Shutter speeds a
5. or operating button Middle AE lock EXPOSURE CONTROL WITH Your X 570 can be used in either of two exposure control modes as summarized below and explained on the following pages Aperture priority A auto mode When the mode shutter speed selector is at the click stop A all you need do is set the desired aper ture The camera will automatically set the corresponding stepless shut ter speed and if main switch is at m warn you if it is too slow for normal hand holding This mode is thus ideal for general picture taking when you wish to concentrate on your subject Since you can control the depth of field by choosing an appropriate aperture A mode is also easy to use for creative photo graphy with virtually any Minolta lens as well as with close up macro and micro accessories THE X570 222222 2 Match LED manual M mode The X 570 s easy to use manual mode set by pressing A lock re lease and moving selector to any click stop other than A is useful when A subject or desired photographic effect requires a fixed speed AE lock cannot be readily used You want to set the aperture and shutter speed yourself but still want an easy to use meter read ing You want full manual control of settings METERING WITH THE X 570 2222 22233 Your X 570 s center weighted av eraging meter system is designed so that light from all parts of the viewfield picture area is measured by the pentapri
6. OSURE CONTROL WITH THE X 570 24 PREPARING TO TAKE PICTURES 10 Summary of modes lee 24 MOUNTING AND CARE OF LENSES 10 METERING WITH THE X 570 25 Body and lens caps 2 e eee eee eee 10 Eyepiece Cap erensia d wie w md Pea eae ed 25 Attaching and removing lenses 11 OFUNDAMENTALS OF EXPOSURE 26 Care of glass surfaces 0 eee 11 APERTURE PRIORITY AUTO EXPOSURE BATTERIES AND POWER 12 MODE A mode 0 000 cee eee eee 28 Batteries 2 suena cae ee wee ce Be a 12 AE LOCK 4 uro dn ce alae etek area as 30 Main switch sse wie edie se bee eee eee eee eee 13 EXPOSURE ADJUSTMENT eese 30 Operating button 0 0 cece ne 14 STOP DOWN METERING sees 31 Automatic battery check and shutter lock 14 OWHEN TO USE AE LOCK OR ADJUST Battery holder llle 15 EXPOSURE ees dha eda aa eee 32 Cold weather operation sees 15 MATCH LED MANUAL EXPOSURE FILM AND FILM SPEED 16 MODE M mode 00 eee ene 34 LOADING AND ADVANCING FILM 17 Long exposures B setting oorau 35 Loading film 2l 17 Film advance lever ACRAS E ER ecu 20 Safe Load Signal Frame counter 20 REWINDING AND UNLOADING FILM 21 FOCUSING sel SCREEN RUN A 36 Focusing ald ios oe Sas ke bebida bas 36 Distance scale 2 1 ee ee es 37 Film pl
7. ane index 0 000 seres 37 Infrared index ccc bho R44 Ew eux 37 DDEPTH OF FIELD 0 2 an 38 Preview button 0 cece tec nn 39 Depth of field scale 0 0 0 eee eee 39 CIBLUR FROM CAMERA SUBJECT MOVEMENT 40 SUPPORTING THE CAMERA AND RELEAS ING THE SHUTTER sr 41 Slow shutter speed warning ss 42 Mounting camera on tripod 42 Self timer roetes os ge ve eames ode ES 43 Other ways of releasing shutter 43 FLASH PHOTOGRAPHY 06 44 Connecting flash units 45 Slow shutter Sync 0 cee ee ee ee eee 45 OCREATIVE CONTROL 00005 46 ACCESSORIES eee eee 49 TECHNICAL DETAILS 54 STORAGE daone aurires ena BT O Supplemental information on fundamentals of photo graphy given in boxes NAMES OF PARTS MAIN FEATURESX C 8 as Main switch Mode shutter speed selector Operating button OFF ON audible slow A Aperture priority AE Soft touch electromagnetic shutter speed warning and 1 1000 Stepped shutter speeds release locks when battery self timer beeps for match LED manual power too low B Long bulb exposures Touch switch metering with 15 sec hold of LED display Back cover release knob A lock release Safe Load Signal Monitors correct film advance Frame counter Film advance lever Smooth 130 advance stroke after 30 un
8. eces sary NOTE elf the film advance lever stops at the end of a full stroke during the following steps release the shutter and continue main switch must be on 3 Pull out enough film leader to just reach the take up spool then insert the end into a slot on the left as shown above making sure it does not protrude from another slot A hole in the film should be lined up with the tooth on the take up spool and the sprocket teeth should be engaged with holes at the bottom of the film If you find it easier to hold the film leader insert the film as shown in your right hand in the diagram above making sure the take up spool tooth engaged with a hole is properly 4 With the film held against the sprocket by your left hand slowly operate the film advance lever until the film is wound firmly around the take up spool the sprocket teeth are engaged with holes on both edges of the film and the slack in the film is taken up 5 After making sure the film is taut close the camera back by pushing in on it until it locks shut A red S should now appear opposite the index in the frame counter CAUTION eSlack should be taken up by advancing not rewinding the film If you rewind the slack into the cartridge then later advance the film to 1 the first frame may have already been exposed to light 19 20 EE 6 Advance film release shutter and advance film until the i
9. er NOTE elf the operating button becomes dirty or greasy turn off the main switch and wipe the button with a clean dry cloth 1000 500 250 125 60 prepare spares replace Automatic battery check and shut ter lock The X 570 automatically checks the batteries when the operating button is touched or pressed or AE lock is pressed When batteries are almost ex hausted the mode LED A or M blinks as a warning that fresh ones will soon be needed When batteries are fully exhausted or not correctly installed no LEDs light and the shutter locks Battery holder Fresh spare batteries can be stored in the battery holder thread ed on the camera strap p 9 To insert batteries form a loop as shown above then drop them in Slide the holder off the strap to remove batteries NOTE e f the camera is not to be used for more than two weeks it is advis able to remove batteries especially old ones Cold weather operation Since batteries tend to lose power as they become colder always use fresh batteries and keep a spare set with you when using your camera in cold weather For prolonged cold weather use approx O C 32 F or lower silver oxide batteries are re commended Battery capacity will be restored as temperatures rise NOTES e If a lithium battery is used below approx 0 C the camera may not operate e Never transfer the camera directly from low to high temperatu
10. he camera back CAUTION e Film should be stored in a cool dry dark place before use and ex posed before the expiration date printed on the box LOADING AND ADVANCING FILM Loading film Before opening the camera back confirm that there is no film inside that could be damaged by light if the back is opened by checking that No red is visible in the Safe Load Signal p 20 Rewind crank can be freely ro tated clockwise many times with out pushing rewind button Since the frame counter advances each time the shutter is cocked even if no film is inside the camera may be empty even when the index does not point to S Prior to loading film set the film speed see previous page and turn the main switch on p 13 CAUTIONS e Film should be handled and load ed in subdued light at least shaded from direct sunlight by your body e Do not touch any parts or areas shown in blue below 17 18 1 With the case off unfold the rewind crank and pull up on the back cover release knob until the camera back springs open Gently blow away any dust or other parti cles inside with a blower brush NOTE When loading film in a dark place or with the lens cap on loading will be easier if the mode selector is not set at A 2 Leaving the knob pulled out position a 35mm film cartridge as shown with the projecting spool down Then push the knob all the way in rotating it slightly if n
11. ing to use your camera so that you will be sure what to do when you come to the end of the film MOUNTING AND CARE OF LENSES Body and lens caps Remove body and lens caps as shown at right CAUTIONS e Always cap the rear end of the lens and the lens mount of the camera when the lens is not at tached and the front of the lens when the camera is not in use e To prevent damage to the control pins never set a lens with its rear end down unless a rear lens cap is on elf it is necessary to set an un capped lens with its front end down do so on a smooth surface Fisheye lenses should always be capped before being placed front end down Keep lenses properly capped front and rear in their cases when not in use To attach lens After removing the body cap and rear lens cap align the red mount ing index on the lens barrel with the red index on the camera s lens mount insert the lens bayonet into the socket then turn the lens clock wise until it locks into place with a click To remove lens While pushing the _ lens release button turn the lens counterclock wise as far as it will go then lift it out of the mount CAUTION e Be careful not to touch anything inside the camera when attaching or removing lenses Care of glass surfaces e Never touch lens or eyepiece surfaces with fingers or other ob jects If necessary remove loose matter with a blower brush Use special photographic lens tissue o
12. lm increase then completely disappear and the crank will then turn freely CAUTION eNever open the camera back when there is any red still visible in the Safe Load Signal 3 When you are certain that the exposed film is completely re wound into the cartridge pull up on the back cover release knob to open the back then remove the cartridge CAUTION e Exposed film should be kept in a cool dry dark place and developed as soon as possible 21 F Es ES TAKING PICTURES WITH YOUR X 570 Pages 23 to 47 explain how to use your camera to take pictures The sections in boxes give addition al information on some of the fundamentals of photography Self timer Pre shooting check To make sure your camera is ready for picture taking it is a good habit to check the items shown here Minimum aperture lock released on new type MD lens Film inside Main switch at ON or ss Mu Film advanced Film speed Mode shutter speed set Batteries OK Does mode LED glow not blink when 23 operating button is touched or pressed 24 If you hold the camera as shown you can easily operate most con trols while viewing LEFT HAND Thumb focusing grip aperture ring or preview button Index focusing grip Middle aperture ring RIGHT HAND Thumb film advance lever Index mode shutter speed selector and A lock release
13. ndex points to 1 A red bar should now appear at far left in the Safe Load Signal indicating film is load ed and advancing properly If it does not appear or swings far to the right repeat steps 3 to 6 The camera is now ready for taking the first picture provided film speed is set Film advance lever To allow swinging the film advance lever out from the camera body so the right thumb will fit comfortably behind it the lever has 30 of unengaged movement As the lever is moved an additional 130 the film and frame counter advance When it stops at the end of the full 160 stroke the shutter is cocked for the next exposure Safe Load Signal Frame counter As you continue taking pictures and advancing film the red bar in the Safe Load Signal gradually moves to the right and the rewind crank rotates counterclockwise in dicating proper film advance Never force the lever when it resists further movement at the end of the film which may be some what before or after the common film lengths 12 20 24 36 expo sures shown in red in the frame counter The frame counter stops advancing after 36 exposures 1 To rewind the film remove the camera s case if on then press the rewind release on the camera bot tom 2 Unfold the rewind crank and turn it in the direction of the arrow until the red bar in the Safe Load Signal moves out of the window to the left Near the end you will feel tension on the fi
14. r a soft clean cloth to remove smudges or fingerprints with a gentle circular motion Only if absolutely neces sary the tissue may be moistened very slightly with not more than one drop of a satisfactory quick evaporating fluid cleaner specially compounded for photographic lenses Such fluids must never be dropped directly on the glass sur face e Never lift the mirror or touch its surface as doing so might damage the alignment Small smudges or fingerprints on the mirror will not affect the meter reading or image quality if they are very annoying have the camera cleaned at an authorized Minolta service facility 11 12 BATTERIES AND POWERS Batteries For operation of the X 570 s circuitry and shutter use one of the following types of batteries Two 1 55v silver oxide SR44 Eveready S 76 EPX 76 or equiv Two 1 5v alkaline manganese LR44 Eveready A 76 or equiv One 3v lithium CR 1 3N See note on p 15 CAUTIONS Never use 1 35v mercury batteries MR44 Eveready EPX 675 or equiv which have a similar shape and size To avoid battery leakage or burst ing do not mix batteries of differ ent types brands or ages Used batteries should not be dis posed of in fire WARNING Keep batteries away from young children 1 Unscrew the battery chamber cover on the camera bottom alkaline manganese J cht lithium silver oxide 2 After wiping the terminals with a clean dr
15. r year at an authorized Minolta service facility Lens care instructions are given on pages 10 and 11 If you will not be using your camera for an extended period see the storage instructions at the back of the manual If you have questions concerning operation of your camera or about photography feel free to contact your local Minolta agent or distributor by writing one of the offices listed inside the back cover CAUTION Before using lenses flashes or other accessories made by companies other than Minolta attach them to the camera to make sure they function properly and take test photographs if necessary bs Bona Strap and case The strap provided with camera and case sold separately should be attached as shown to keep your camera handy for use and to pro tect it from being dropped or bumped NOTE e The protective plastic film on the camera s base can be removed if desired 10 PREPARING TO TAKE PICTURES The next four sections cover things you must do to prepare your camera for taking pictures Attach lens at right Insert batteries and turn main switch on pp 12 and 13 Set film speed p 16 Load camera with film pp 17 to 20 You must always install batteries properly and turn on the main switch before loading film the order of other steps may vary Instructions for rewinding and unloading film are also given in this part We recommend reading them before start
16. re expressed in fractions of a second generally the reciprocals of numbers shown on shutter speed scales and in seconds Each stand ard shutter speed e g 1 60 sec allows light to strike the film twice as long as the next faster one 1 125 and half as long as the next slower one 1 30 This difference between standard shutter speeds is also called one stop Total exposure on the film is determined by the combination of aperture and speed Using the next smaller f number i e giving one stop more expo sure will balance using the next faster shutter speed i e giving one stop less exposure and so on A great range of combinations e g f 5 6 at 1 30 f 4 at 1 60 f 2 8 at 1 125 etc all of which fall on the same diagonal line will thus yield the same total exposure The diagonal lines correspond to exposure values EV all of the aperture shutter speed combinations indicated by a given line will produce the same ex posure At any specific film speed the EV increases by one each time the subject brightness doubles and thus the required exposure will decrease by one stop On the other hand when the EV is one unit lower i e when the subject is only half as bright the ex posure must be increased one stop The film speed coupled metering system of the camera measures the brightness of the subject and computes the EV needed for proper exposure which is then used for setting the combination of aperture and
17. res as condensation may form inside and prevent normal operation 16 FILM AND FILM SPEED The X 570 uses standard 35mm cartridge film If you are not al ready familiar with the many types available you may want to experi ment to find one or more that give pleasing results for subjects you like to photograph or for special situa tions The ISO film speed incorporating ASA and DIN numbers indicates the film s sensitivity to light The first part of the ISO number equivalent to ASA number is marked on the X 570 s film speed ring Each time this number dou bles e g from 25 to 50 50 to 100 the required exposure is halved Such a change is called one stop Though selecting a high speed film will allow you to take pictures when there is less light such films in general may produce a grainier image RE REESE rrr CG Setting film speed While pressing the release turn the film speed ring until the desired number lines up with the index and locks in place when you remove your fingers Intermediate settings and DIN equivalents 20 40 80 160 320 640 1250 000 2500 00 50 e 100 e e 200 e e 400 e 800 e1600 e 3200 Din 15 18 21 24 13 14 16 17 19 20 22 23 Z5 26 28 29 31 32 34 35 A handy ISO DIN ASA table with a surrounding memo holder for keeping the film box end as a reminder of the film type and number of exposures is located on t
18. rive coupler E Winder motor drive guide socket 7 Your Minolta X 570 is a high precision instrument designed to give many years of trouble free picture taking if used and cared for properly The precautions you should follow for keeping the camera in good operating condition are given below and at various places throughout the text e Always keep your camera in its case with the lens capped when not in use or with a body cap on when a lens is not attached e No part of the X 570 should be forced at any time If operation is not as you think it should be carefully restudy the applicable instruction or consult an author ized Minolta service facility e Never subject your camera to shock high heat and or humidity water or harmful chemicals Be particularly careful not to leave it in the glove compartment or other places in motor vehicles where it may be subject to high temperatures e Never lubricate any part of the body or lens e Never touch the shutter curtains or the front inside part of the body with fingers or other objects or blow against them as doing so might damage the alignment and movement of either the curtains or mirror TAKING CARE OF YOUR X 570 2 2994 e External camera and lens barrel but not glass surfaces should be wiped with a soft silicone treated cloth or other clean dry cloth now and then especially after using the camera near salt water elt is recommended to have your camera cleaned once pe
19. s Auto control is maintained even when using mirror lenses and close up accessories such as bellows not possible with shutter priority AE systems Creative flexibility exists in the X 570 s match LED manual mode For correct exposure at the metered value you simply adjust aperture and or shutter to align blinking and glowing LEDs in the viewfinder Or you can merely refer to these LEDs or totally disregard them when making your own settings The X 570 s through the lens off film Direct Autoflash Metering system interacts with PX series Auto Electroflash units to provide accurate effortless flash photography Any aperture on the lens can be selected so you can open the lens fully up for maximum flash range or close it down for greater depth of field Flash ready and sufficient exposure signals are given in the viewfinder and the shutter is automatically set for proper sync at 1 60 second unless the AE lock is engaged at a slower speed for fill in of the background by ambient light Other features of the X 570 that simplify its use and add to its versatility are explained on pages 4 to 7 Accessories for flash photography data imprinting camera control automatic film advance etc are introduced on pages 49 to 53 CONTENTS um de is NAMES OF PARTS MAIN FEATURES 4 TAKING PICTURES WITH YOUR X 570 23 TAKING CARE OF YOUR X 570 8 Pre shooting check lees een 23 Strap and cas sss duh ua ee E 9 EXP
20. se up accessories can be used in aperture priority AE mode See page 31 for special instructions for some of them
21. shutter speed APERTURE PRIORITY AUTO EXPOSURE MODE A mode ESSE Basic settings S 10 16 30 ez A 6 ws ISNA Set lens at desired aperture Taking pictures in A mode After you have set the mode selector and desired aperture as shown at left the camera will auto matically select the stepless shutter speed needed for proper exposure All you need do before releasing the shutter is compose focus and check the viewfinder as follows Is the over range LED blinking If so turn the aperture ring toward f 22 until the LED stops blinking If it does not stop use a neutral density ND filter or reduce the light level if possible s an LED on in the danger zone for hand holding usually 1 30 sec or slower p 40 Or does the slow shutter speed warning beep when the main switch is at aw and you touch the operating button If so turn the aperture ring toward f 1 7 until an LED outside the danger zone glows If impossible use a suitable LC camera support method p 42 or a flash p 44 Is the under range LED blinking If so turn the aperture ring to ward f 1 7 until it stops blinking or increase the light level if possi ble NOTES e n some situations you may want to use the AE lock or adjust expo sure pp 30 to 33 f your head is not shielding the eyepiece from light when the pic ture is taken use the eyepiece cap p 25 e Almost all Minolta lenses and clo
22. sm s silicon photo cell but influence from a broad cen tral area is greatest Thus the read ing should give satisfactory expo sure without adjustment as long as the main subject area occupies a major part of the center of the frame When it does not you may want to use the AE lock to take a close up reading or temporarily change the film speed setting to ad just exposure pp 30 to 33 As with most metering systems strong sources of direct light or other very bright areas may adverse ly influence the reading if allowed to dominate the frame Though the X 570 s viewfinder is designed to minimize the effect on the meter of light entering through the eyepiece under usual condi tions you should be careful to shield the eyepiece especially if you wear glasses in the following situations When the subject is in shade and the camera is in sunlight When bright sidelight falls be tween eye and eyepiece When stop down metering is used p 31 To shield the eyepiece use a rubber eyecup or place your thumb so that it blocks sidelight When viewing is unnecessary the eyepiece cap can be used to completely eliminate the problem Eyepiece cap If the shutter is released without the eyepiece being shielded by your head such as in remote or self timer operation etc when the camera is used in A mode or at B slide the eyepiece cap onto the frame around the eyepiece to prevent unwanted light
23. y cloth hold the batter ies by their edges and insert them plus side out into the sleeve on the inside of the cover 3 Replace the cover and screw it in clockwise as far as it will go Main switch For the camera s circuitry and shutter to operate the main switch must be set at either ON or il The latter position should be used when you want audible beeps during self timer operation or an audible warning whenever the auto shutter speed set by the camera is 1 30 sec or slower For the slow shutter speed warning to function the viewfinder display must be on p 14 To prevent accidental exposures and battery drain move the main switch to OFF when you are done taking pictures When the switch is left on however battery drain occurs only if the operating button is touched so you may want to leave it on to avoid missing unexpected shots 13 14 Operating button Touching the operating button or pressing the AE lock with main switch on activates the camera s meter viewfinder LED display and exposure control system If proper contact is not possible e g in cold weather when fingers are excessive ly dry or when wearing gloves press the button slightly The shutter is released when the operat ing button is pressed all the way down For easier operation of other controls while viewing through the finder the circuits will remain on for 15 sec after you remove your fing
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