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1. Focal Length Aperture 50 mm f 1 2 Lens Construction 6 groups 8 elements Minimum Aperture f 16 Angle of View Diagonal 46 Vertical 27 Horizontal 40 Min Focusing Distance 0 45m 1 5ft Max Magnification 0 15 x Field of View 164 x 250 mm 6 5 x 9 8 inch at 0 45 m Filter Diameter 72 mm 2 8 inch Max Diameter and Length 85 8 x 65 5 mm 3 4 x 2 6 inch Weight 590 g 20 8 oz Hood ES 78 Lens Cap E 72U Case LP1214 The lens length is measured from the mount surface to the front end of the lens Add 21 5 mm when including the lens cap and dust cap e The size and weight listed are for the lens only except as indicated e The EF1 4X II EF2X Il extenders cannot be used with this lens Aperture settings are specified on the camera e All data listed is measured according to Canon standards Product specifications and appearance are subject to change without notice ENG 9 Canon CT1 7567 004 CANON INC 2006 2009 7
2. Canon EF LENS EF50mm f 1 2L USM AS ULTRASONIC Thank you for purchasing a Canon product The Canon EF50mm f 1 2L USM lens is a high performance large aperture standard lens with a large diameter high precision aspherical lens element designed for EOS cameras The lens is suitable for portraits and other types of photographs making full use of the large diameter lens feature for nice background blur e USM stands for Ultrasonic Motor Conventions used in this instruction Q Warning to prevent lens or camera malfunction or damage El Supplementary notes on using the lens and taking pictures Features 1 Large diameter high precision aspheric lens element for excellent imaging performance even at the maximum aperture Ultrasonic motor USM for quick and quiet autofocusing Manual focusing is available after the subject comes into focus in autofocus mode ONE SHOT AF A truly round aperture hole results in a nicer background blur Tight seal structure ensures excellent dust proof and drip proof performance e Since the front element of this lens moves when focusing you need to attach a Canon PROTECT filter sold separately for adequate dust and water resistant performance Without a filter the lens is not dust or water resistant ENG 1 Safety Precautions A Safety Precautions Do not look at the sun or a bright light source through the lens or camera Do
3. The rubber ring may cause slight abrasions around the camera s lens mount but this will not cause any problems If the rubber ring becomes worn it is replaceable by a Canon Service Center at cost I a A After detaching the lens place the lens with the rear end up to prevent the lens surface and electrical contacts from getting scratched e If the contacts get soiled scratched or have fingerprints on them corrosion or faulty connections can result The camera and lens may not operate properly If the contacts get soiled or have fingerprints on them clean them with a soft cloth If you remove the lens cover it with the dust cap To attach it properly align the lens mount index and the O index of the dust cap as shown in the diagram and turn clockwise To remove it reverse the order ENG 4 2 Setting the Focus Mode To shoot in autofocus AF mode set the focus mode switch to AF To use only manual focusing MF set the focus mode switch to MF and focus by turning the focusing ring The focusing ring always works regardless of the focus mode Fl After autofocusing in ONE SHOT AF mode focus manually by pressing the shutter button halfway and turning the focusing ring Full time manual focus 3 Infinity Compensation Mark Infinity compensation mark Distance index To compensate for shifting of the infinity focus point that results from changes in temperature The
4. infinity position at normal temperature is the point at which the vertical line of the L mark is aligned with the distance indicator on the distance scale 4 For accurate manual focusing on subjects at infinity distance look through the viewfinder while rotating the focusing ring ENG 5 4 Infrared Index The infrared index corrects the focus setting when using monochrome infrared film Focus on the subject manually then adjust the distance setting by moving the focusing ring to the corresponding infrared index mark d Some EOS cameras cannot use infrared film See the instructions for your EOS camera F The infrared index position is based on a wavelength of 800 nm Be sure to observe the manufacturers instructions when using infrared film Use a red filter also when you take the picture 5 Depth of Field Scale The depth of field is the distance in front of and behind the plane of focus on the subject that appears sharp The depth of field is indicated by the area between the depth of field scale lines below the distance scale Numbers in the scale are in F values and for example if the shooting distance is 3m and the aperture is f 11 the sharp area will extend from about 2m to 5m Fl The depth of field scale is an approximate indicator ENG 6 7 Filters Sold separately You can attach filters to the filter mounting thread on the front of the lens d To ensure dust and water resistant
5. performance attach a Canon PROTECT filter 72mm Only one filter may be attached e If you need a polarizing filter use the Canon Circular Polarizing Filter 72mm The ES 78 hood can keep unwanted light out of To adjust the polarizing filter first remove the the lens and also protects the lens from rain lens hood snow and dust Attach and align the hood to the hood mount on the front of the lens and turn the hood as shown by the arrow to secure it The hood can be reverse mounted on the lens for storage dd Part of the picture may be blocked if the hood is not attached properly When attaching or detaching the hood grasp the base of the hood to turn it To prevent deformation do not grasp the rim of the hood to turn it ENG 7 8 Extension Tubes Sold separately 9 Close up Lenses Sold separately You can attach Extension Tube EF 12 Il or EF25 Attaching a 500D 72mm Close up Lens Il for magnified shots The shooting distance and enables close up photography magnification are shown below Magnification will be 0 25x 0 10x De ner Magnification G Close up Lens 250D cannot be attached because there is no size that fits the lens Near Far Near Far Manual focusing is recommended for accurate EF12 Il 246 322 0 39x 0 24x focusing EF25 Il 204 218 0 67x 0 53x fl Manual focusing is recommended for accurate focusing ENG 8 Specifications
6. ant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures e Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Consult the dealer or an experienced radio TV technician for help This Class B digital apparatus complies with Canadian ICES 003 ENG 2 Nomenclature Distance scale 5 6 Infrared index 6 Depth of Field scale 6 Filter mounting thread 7 Focus mode switch 5 Contacts 4 Focusing ring 5 Lens mount index 4 For detailed information reference page numbers are provided in parentheses ENG 3 1 Mounting and Detaching the Lens See your camera s instructions for details on mounting and detaching the lens The lens mount has a rubber ring for enhanced water and dust resistance
7. ing so could result in loss of vision Looking at the sun directly through the lens is especially hazardous e Whether it is attached to the camera or not do not leave the lens under the sun without the lens cap attached This is to prevent the lens from concentrating the sun s rays which could cause a fire Handling Cautions If the lens is taken from a cold environment into a warm one condensation may develop on the lens surface and internal parts To prevent condensation in this case first put the lens into an airtight plastic bag before taking it from a cold to warm environment Then take out the lens after it has warmed gradually Do the same when taking the lens from a warm environment into a cold one e Do not leave the lens in excessive heat such as in a car in direct sunlight High temperatures can cause the lens to malfunction This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation Do not make any changes or modifications to the equipment unless otherwise specified in the instructions If such changes or modifications should be made you could be required to stop operation of the equipment This equipment has been tested and found to comply with the limits for a class B digital device pursu

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