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Asahi Pentax MX

posted 2-29-'04

, M. Butkus, NJ.

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SMC Pentax lenses and Pentax accessories are engineered and produced meticulously to precise Asahi Pentax

specifications. Lenses and accessories from other manufacturers are not produced to these precise specifications and,

therefore, may cause difficulties with - or actual damage to - a Pentax camera. Asahi Pentax cannot assume any

responsibility for difficulties resulting from the use of any other brand of lenses or accessories with an Asahi Pentax

camera.

CONTENTS

Nomenclature 2

Specifications 4

Lens Mounting 6

Inserting Batteries 7

Basic Operating Instructions 8

Film Loading and Winding 10

Setting ASA Film Speed 11

Setting the Shutter Speed Dial 12

Composing and Focusing 13

Exposure Measurement 14

Meter Coupling Range 22

Helpful Hints on Exposure Problems 23

Dual Control Exposure System 23

Shutter Button Lock 24

Manual Shutter Operation 25

Self-timer 26

Infra-red Photography 27

Multiple Exposure 28

Interchangeable Focusing Screens 29

Using Screw-mount Takumar Lenses 30

Summary of content (22 pages)

PAGE 1
Asahi Pentax MX posted 2-29-'04 This camera manual library is for reference and historical purposes, all rights reserved. This page is copyright© by , M. Butkus, NJ. This page may not be sold or distributed without the expressed permission of the producer I have no connection with any camera company On-line camera manual library This is the full text and images from the manual. This may take 3 full minutes for all images to appear. If they do not all appear.
PAGE 2
Holding the Camera 15 Unloading Film 16 Flash Synchronization 18 Depth-of-Field Preview Lever and Scale 20 Depth-of-Field Table: SMC Pentax-M 50mm f/1.4 Lens 21 Open-aperture and Stop-down Metering Lenses 32 Resistance to Temperature Extremes and Changes 33 Camera Maintenance 34 Warranty Policy 36 1. Exposure counter 2. Shutter button lock lever 3. Shutter-cocked indicator 4. Shutter release button 5. ASA window 6. ASA dial lock button 7. Shutter speed dial 8. Shutter speed index 9. Rapid-wind lever 10.
PAGE 3
5. Film rewind button SPECIFICATIONS Type 35mm full-frame SLR camera with open-aperture center weighted Lens mount Through-The-Lens meter. Pentax K bayonet. Standard lenses SMC Pentax 50mm f/1.2 SMC Pentax-M 50mm f/1.4 SMC Pentax-M 50mm f/1.7 SMC Pentax-M 40mm f/2.8 Shutter Horizontal-run, rubberized silk focal-plane shutter; speeds from 1 Flash synchronization to 1 /1000 sec. plus B; shutter lock and "Cocked" indicator. FP and X sockets, plus hot/cold accessory shoe for X contact; 1/60 sec.
PAGE 4
Power source Back cover GPD cells for fast light response, with tri-colored LED exposure read-out, rapid wind lever and shutter release button acting as meter switch. Exposure range: EV1 - 19 (ASA100, f/1.4), Film speed range: ASA25. 1600. Two 1.5V silver oxide batteries (G13); LED's double as battery check lamp. Standard back with memo holder, interchangeable with Magazine Body size Back MX, Dial Data MX for data recording on film. 135.5mm x 82.5mm x 49.5mm. Body weight 495 grams.
PAGE 5
BATTERIES Two silver oxide batteries are packed separately. Be sure to insert them into the battery chamber before operating the camera. CAUTION: The battery is like a phonograph record, it can be damaged by skin acids. Handle by the edges with a dry cloth before insertion into the camera. Also be especially sun to wipe off the battery with a cloth when they are salted. The battery is not rechargeable Do not throw a dead battery into a fire, as it may explode. Also keep it beyond the reach children.
PAGE 6
BASIC OPERATING INSTRUCTIONS 1. Set Film Speed While depressing the tiny button atop the shutter dial, turn the rim of the shutter dial until the ASA number of the film you are using is centered in the ASA window. 2. Cock Rapid-Wind Lever Cock the rapid-wind lever all the way until it stops. The "Cocked" indicator will turn red, showing that the shutter is cocked. 3. Set Shutter Speed Turn the shutter speed dial until the speed you want to use is opposite the index mark.
PAGE 7
4. Composing and Focusing While viewing through the finder, turn the focusing ring until your subject comes into sharp focus and choose the most pleasing composition. 5. Turn on Exposure Meter and Rotate Aperture Ring Pull out the rapid-wind lever slightly (20°) and depress the shutter release button halfway to turn on the exposure meter. The preselected shutter speed plus the two adjacent speeds ("60" and "250" in the case of "125") are visible on the right-hand side of the viewfinder.
PAGE 8
4. Cock the rapid-wind lever, and confirm that the film rewind knob turns counterclockwise, indicating that the film is properly loaded and is moving from cartridge to take-up spool. Trip the shutter. Advance the film until the exposure counter turns to "1 ", indicating that the first picture is ready to be taken. SETTING THE ASA FILM RANGE MEMO HOLDER As a reminder of the type of film in your camera, tear off the top of the film box and insert it into the Memo Holder on the back of the camera.
PAGE 9
SETTING THE SHUTTER SPEED DIAL COMPOSING AND FOCUSING Turn the shutter speed dial clockwise or counter-clockwise to the shutter speed desired. The shutter speed may be set either before or after cocking the rapidwind lever. As you cock the shutter by turning the rapid-wind lever, the "cocked" indicator turns red showing that the shutter is cocked. The color of the cocked indicator changes to black after tripping the shutter. For use of the X setting on the shutter speed dial, refer to page 18.
PAGE 10
EXPOSURE MEASUREMENT When the rapid-wind lever is pulled out 20° and the shutter button is depressed halfway, the exposure meter is turned ON. Turn the aperture ring to get a proper LED exposure read-out in the viewfinder. On the right-hand side of the viewfinder, appear the preselected shutter speed plus two adjacent speeds (e.g. "60" and "250" in the case of "125") on a transparent disk which protrudes slightly into the focusing screen area.
PAGE 11
UNLOADING FILM - AVOID DIRECT LIGHT WHEN UNLOADING THE FILM After the final picture on the roll has been taken, the rapid-wind lever will not advance further, indicating that the film must be rewound. Lift up the rewind crank. Depress the film rewind button and turn the rewind crank as indicated to rewind the film into its cartridge. Rewind until the tension on the crank lessens, indicating that the leader end of the film has been released from the take-up spool.
PAGE 12
PAGE 13
FLASH SYNCHRONIZATION The MX has FP and X terminals on the front of the camera body, and a separate X contact on the built-in hot shoe. The table on the next page shows which flash contact, which shutter speed and which flash bulb may be combined for maximum lamp efficiency. Unless these combinations are rigidly followed, there will be a failure in flash synchronization. Note the "X" setting is exactly at the 60 mark on the shutter speed dial.
PAGE 14
DEPTH-OF-FIELD PREVIEW LEVER AND SCALE Depth of field is the range between the nearest and farthest distances which are in focus at a given lens aperture. If you want to know how great the depth of field is at a certain aperture, focus on a subject and look through the viewfinder while moving the Self-timer lever toward the lens, and you will be able to preview the depth of field. Or, after focusing, look at the depth-of-field scale on the lens.
PAGE 15
METER COUPLING RANGE The exposure meter of the MX measures the brightness of the ground glass. Therefore, the proper LED exposure read-out should be obtained after you have focused your subject on the ground glass. The green area in the table indicates the coupling range of the meter, and should not be interpreted as the camera's total range of f/stop-shutter speed combinations. As you will note from the table below, with ASA100 film, you may use any shutter speed from 1 sec. to 1/1000 sec.
PAGE 16
SHUTTER BUTTON LOCK The shutter button lock lever is for your convenience while you are making a particularly long exposure using the B shutter speed setting. After depressing the shutter button, turn the lock lever (which is on the collar at the base of the shutter button) so that the letter "L" is visible. When the exposure time is up, move the lock lever back to its original position. This automatically releases the shutter button.
PAGE 17
SELF-TIMER The Self-timer delays the shutter release by 4-.12 seconds, depending upon how far counterclockwise (when camera faces you) the lever is advanced. When using the Selftimer, do not depress the shutter button ... it will immediately release the shutter without delayed action. After cocking the rapid-wind lever, advance the Self-timer lever 90° -180°. Then, push the start button, and the Selftimer will commence.
PAGE 18
MULTIPLE EXPOSURE For deliberate multiple exposures, make the first exposure in the normal way. Then tighten the film by turning the rewind knob , and keep hold of the rewind knob. Depress the film rewind release button and advance the rapid-wind lever. This cocks the shutter without advancing the film. Finally release the shutter to make the second exposure. Then make one blank exposure, before taking the next picture, to avoid overlapping.
PAGE 19
USING SCREW-MOUNT TAKUMAR LENSES Conventional screw-mount Takumar lenses (both SuperTakumar and SMC Takumar) can be easily mounted onto your camera by attaching them first to a Mount Adaptor K. However, when Adaptor K is used, the following is true: 1. Due to the difference in coupling systems, the automatic diaphragm will not function. 2. Full-aperture metering lenses will function as stopdown metering lenses. How to Use Mount Adaptor K 1. Screw the conventional Takumar lens into the Mount Adaptor K. 2.
PAGE 20
OPEN-APERTURE AND STOP-DOWN METERING LENSES Open-aperture SMC Pentax lenses have a diaphragm coupling lever on the back of the lens which couples with the camera body to permit open-aperture metering. The ultra telephotos do not have a diaphragm coupler, so they must be used with the stop-down metering system. Use of the Auto-Extension Tube Set K permits open-aperture metering.
PAGE 21
CAMERA MAINTENANCE 1. Always keep the viewfinder eyepiece, lens and filters as clean as possible. To remove loose dust and dirt, first use the blower and then the brush of a lens brush. Do not try to wipe off granular dirt or dust it's an excellent way of scratching the glass. Smudges, such as fingerprints, should be carefully wiped away with either lens tissue or a clean, soft cloth. Clean, plain cotton handkerchiefs that have already been washed a few times are particularly good for this.
PAGE 22
WARRANTY POLICY All Asahi Pentax cameras purchased through authorized bona fide photographic distribution channels are guaranteed against defects of material or workmanship for a period of twelve months from date of purchase. Service will be rendered and defective parts will be replaced without cost to you within that period, provided the equipment has not been abused, altered, or operated contrary to instruction.