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ENG-7

Focus mode switch

Focusing ring

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.

2.  Setting the Focus Mode

 

z

 Quickly turning the focusing ring may result in 

delayed focus.

 

z

 The lens’ focusing ring is electronic. 

 

z

It is possible to set cameras that support 

electronic fulltime manual focusing to manual 

focusing when the camera is in the operational 

mode. However, the camera settings need to be 

changed.

 

z

When AF operation is set to One-Shot AF, 

manual focus is possible after autofocusing 

has been completed by continuing to press the 

shutter button halfway (electronic manual focus 

function). However, the camera settings need to 

be changed.

 

z

When movie recording, the AF speed will be 

slower than the still photo shooting mode. It is 

possible to adjust the AF speed on the camera 

by setting Movie Servo AF to [Enable].

Please refer to the camera’s instructions for 

details.

Summary of Contents for RF 10-20mm F4 L IS STM

Page 1: ...ENG Instructions ...

Page 2: ...d taking pictures Camera Firmware and Camera Applications Please use the latest versions of firmware and applications with the camera in use For details on whether the firmware and applications in use are the latest version or not and for details on updating them please check the Canon website If the camera s firmware is not a compatible version the following limitations will apply z Magnified vie...

Page 3: ... look directly at the sun or other strong light sources through a lens This may result in loss of sight z Do not leave a lens in the sun without the lens cap attached The lens may concentrate entering sunlight and cause a malfunction or fire Caution Details pertaining to risks that may result in injury or damage to other objects z Do not leave the product in places exposed to extremely high or low...

Page 4: ...to remove dirt or dust from the front lens surface General Precautions z This lens has a wide shooting angle meaning sunlight or other strong light sources can enter the image easily This can lead to flares or ghosts under some shooting conditions To prevent this we recommend being aware of where the light source is such as photographing from shadows or other places where a strong light source wil...

Page 5: ...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 ...

Page 6: ...s function button 9 Zoom ring 8 Focus mode switch 7 Rubber ring 6 Contacts 6 Lens mount 6 Zoom position index 8 Lens mount index 6 Built in lens hood 12 Gelatin filter holder 13 z For detailed information reference page numbers are provided in parentheses Nomenclature ...

Page 7: ...ens place the lens with the rear end up and attach the dust cap to prevent the lens surface and contacts from getting scratched Make sure the lens and dust cap mount indexes are aligned when attaching the dust cap z Contacts that are scratched soiled or have fingerprints on them may result in faulty connections or corrosion which may lead to malfunctions If the contacts get soiled clean them with ...

Page 8: ...time manual focusing to manual focusing when the camera is in the operational mode However the camera settings need to be changed z When AF operation is set to One Shot AF manual focus is possible after autofocusing has been completed by continuing to press the shutter button halfway electronic manual focus function However the camera settings need to be changed z When movie recording the AF speed...

Page 9: ... used with cameras such as shutter speed and aperture settings Control ring The click action of the control ring allows you to have a sense of how much it is being turned Please refer to the camera s instructions for details on how to use the control ring z There are cases in which the sound of control ring operations may be recorded when shooting movies z The clicking sensation of the control rin...

Page 10: ...s instructions for details Lens function button AF stop button Use as a AF stop button During autofocus operation you can press an AF stop button to temporarily pause autofocus and then release the button to resume Press an AF stop button to maintain a focusing distance or to avoid focus search Press the shutter button while holding down an AF stop button to shoot at that focusing distance zUseful...

Page 11: ... violently shaking vehicle or other transportation z When using a tripod the Image Stabilizer might not be fully effective or it might be better to set the image stabilizer switch to OFF depending on the type of tripod and where the tripod is located as well as on the camera s settings such as shutter speed z Even with a monopod the Image Stabilizer will be as effective as during hand held shootin...

Page 12: ...ere the flash cannot be used such as art museums and theater stages z In situations where your footing is uncertain z In situations where fast shutter speed settings cannot be used z Panning shots of vehicles trains etc It compensates for vertical camera shake during panning shots in a horizontal direction and compensates for horizontal camera shake during panning shots in a vertical direction ...

Page 13: ...ached by pinching the lock knobs and vertically aligning the lens cap with the built in lens hood as shown in the diagram z The recessed sections of the lens hood that the cap locks on to are located at the front inside edge of the top and bottom petals ...

Page 14: ... size zDownload the filter template file PDF zPrint the filter template out at full size 100 and use it as the template to cut out the filter zThe templates on this page are printed at full size so can also be used The filter template file is the same as this figure For full frame cameras For APS C cameras Filter template outline Full frame 36 7 mm 1 44 in 29 4 mm 1 16 in 5 0 mm 0 20 in 3 5 mm 0 1...

Page 15: ...e sensor size z Cut along the middle of the lines printed on the filter template Any deviation from the template line width can cause the following issues Note 1 If you cut inside the lines light will come in around the edges of the filter preventing it from working fully In particular there can be differences with exposure and color patches in the corners Note 2 If you cut outside the lines it ma...

Page 16: ...ilter so that it passes above the projections on the left and right With a full frame filter in place Projection Projection With an APS C filter in place Projection Projection z Fit filter between the projections on the left and right z Check that the filter bevel is at the bottom right of the contacts z Image ghosting may occur as a result of using a gelatin filter Also ensure that there is no du...

Page 17: ... then the issues in Note 1 p 14 may occur If the filter is as shown in Fail 2 then the issues in Note 2 p 14 may occur z Take some test shots before shooting to check that the filter is working over the entire image z In particular take a telephoto image of a white wall with even brightness to check in your camera viewfinder or on a monitor z The gelatin filter may come out of place due to shocks ...

Page 18: ...g Distance 0 25 m 0 82 ft Max Magnification 0 12x at 20 mm Field of View Approx 520 x 347 284 x 189 mm 20 47 x 13 66 11 18 x 7 44 in at 0 25 m 0 82 ft Filter Rear gelatin filter holder Max Diameter and Length Approx 83 7 x 112 mm 3 30 x 4 41 in Weight Approx 570 g 20 11 oz Hood Inbuilt Lens Cap Lens Cap 10 20 Lens Dust Cap Lens Dust Cap RF Case LP1219 This comes included with the lens but can also...

Page 19: ...ly z You cannot use extenders z Multiple exposure shooting is not possible when using this lens on certain cameras EOS R RP Ra R5 R6 z There are cases in which using the zoom function during continuous shooting may result in conspicuous image distortion z All data listed is measured according to Canon standards z Product specifications and appearance are subject to change without notice Specificat...

Page 20: ...CT1 D298 D 0923Ni CANON INC 2023 ...

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