EOS Documentation Project

EF 75-300mm f/4-5.6 IS USM

by Gary Fisher

Contents

• Introduction

  Parts  Description  Features 

• Operation

  Mounting  Removal  Manual Zoom  Manual Focus  Auto Focus  Aperture  Image Stabilizer 

• Accessories

  Lens Cap  Hood  Filters  CloseUp  Teleextender  Extension Tubes  Case 

• Incompatibilties

  EF-M body  EOS bodies  APS bodies  Flash  Tripod 

• Precautions
• Lens Care

  Storage  Service 

• Specifications

  Released  Dimensions  Weight  Filter Mount  Optics  Focus mechanism  Rotating Filter Mount  Focus Range  Autofocus Motor  Full Time Manual  Focal Length  Magnification  Angle of view  Aperture blades  Aperture Range  Image Stabilizer 

• Revision History
• Comments

Introduction

Parts

Click above image to view larger version

From front to back: Front lens cap; 58mm filter thread; bayonet fitting for lens hood; Focusing ring; Zoom ring; AF/M lens mode switch; IS on-off switch; Raised Red Dot for lens-to-camera alignment; EF Camera mount (metal); Rear lens cap.

Description

This lens is a general purpose telephoto zoom lens with autofocus and electronic diaphragm for use on Canon EOS series cameras.   The lens can zoom from short telephoto to medium/long telephoto and can be used for general photography. This was the first EF lens to incorporate an Image Stabilizer function, which is what the letters IS stand for in the lens title. The IS function reduces the effects of camera movements and shake, which is a common cause of blurred photographs. IS allows the taking of usable photographs at slower shutter speeds than may otherwise be possible. The lens features an Utrasonic Motor (the USM in the lens title), which provides silent autofocusing capabilities. There are two types of USM motors; this lens features micro USM, which does not provide the full time manual focusing available with ring type USM motors. The front element of the lens rotates and moves forward and backward when focusing.

Features

This was the first Canon EF lens to feature an Image Stabilizer (IS) function which reduces the effects of handheld camera movements and shake, which is a common cause of blurred photographs.

Operation

Mounting

Prepare camera body by removing body cap or previous lens (see next section). Match the raised red dot on the lens with the red dot on the camera. Gently twist the lens clockwise until the lens locking pin clicks into place. Ensure that the lens is securely locked before using the camera.

Removal

Depress the lens release button fully. Rotate the lens counterclockwise until the raised red dot on the lens matches the rot dot on the camera. Remove the lens carefully.

Warning: Do not rest the lens on the camera mount, otherwise damage can occur to the delicate electronic contacts. When not mounted on a camera the rear lens cap should always be in place to prevent damage to the electrical contacts and the rear glass element of the lens.

Manual Zoom

In the picture-taking position turn the zoom ring in the clockwise direction to obtain a wider angle of view. To narrow the angle of view (to zoom in or go toward the longer end of the telephoto range of the lens) turn the zoom ring in the anti-clockwise direction.

Manual Focus

Slide the lens mode switch on the lens to "MF". This disengages the autofocus motor. Look through the camera viewfinder at the subject, then rotate the focusing ring on the lens until you see the viewfinder image is as sharp as possible¹. The front part of the lens rotates and moves in and out (backwards and forwards) during focusing. If you manually focus while holding the shutter release button half-depressed, the focus sensors in the camera may indicate in the viewfinder when sharp focus is detected in a focusing zone.

Note 1: When photographing at very close range, it may be easier to focus by leaving the focusing ring set to the closest focus setting, and moving the camera back and forth until sharp focus is achieved.

Auto Focus

Slide the lens mode switch on the lens to "AF". This engages the autofocus motor. Look through the camera viewfinder and position a focusing zone over the subject. Hold the shutter release button half-depressed to activate autofocus¹. The front part of the lens rotates and moves in and out (backwards and forwards) during autofocus. When sharp focus is detected, the camera will indicate in the viewfinder with a light, and may also beep softly. If the autofocus sensors cannot detect sufficient detail, the viewfinder focus indicator will blink, indicating out-of-focus². When the lens is switched to "AF" mode, it is possible to focus manually without first setting the lens mode switch to "MF". This feature is commonly used in conjunction with a custom function on the camera body (CF4) which shifts the autofocus activation from the shutter release to the AE-Lock button on the rear of the camera.

Note 1: On some camera bodies a custom function allows autofocus activation to be shifted from the shutter release to the AE-Lock button on the rear of the camera.
Note 2: Autofocus accuracy can be enhanced by using the autofocus assist beam on some camera bodies and on some flash units.

Aperture

All Canon EF lenses have an electronic diaphragm, which means that the lens aperture is controlled electronically from the EOS camera body, rather than by the traditional aperture ring. For instructions on changing the aperture setting of any Canon EF (or EF compatible) lens, please refer to the operating instructions for the camera body.

Image Stabilizer

This lens features an Image Stabilizer (IS) function which reduces the effects of handheld¹ camera movements and shake, which is a common cause of blurred photographs. IS allows the taking of usable photographs at slower shutter speeds than may otherwise be possible. The stabilizing effect is equivalent to two stops of shutter speeds. The IS function operates in both AF and MF modes. To engage the IS function set the "Stabilizer" switch to 1. To switch IS off set the "Stabilizer" switch to 0. The stabilization effect starts when the shutter release (or alternate AF activation button) is lightly pressed ². It may take up to one second for the stabilization to be fully effective.

Accessories

Lens Cap

58mm part number E-58U

Hood

Lens hood part number ET-64II

Filters

58mm thread for filter accessories. Multiple filters should not be used simultaneously to avoid vignetting particularly at the 75mm setting(vignetting is a darkening of the corners of the resulting photgraph due to the rims of the stacked filters blocking part of the field of view of the lens).

CloseUp

58mm close-up lenses 250D (part number C543871), 500 (part number C543931) & 500D (C543891). The 250D is suited for lenses with a focal length in the range of 30mm to 135mm. The 500D and 500 are more suitable for lenses with a focal length the range of 70mm to 300mm.

Teleextender

This lens is not compatible with either Canon EF 1.4x or EF 2x Tele-extenders which have a protruding front element. Third Party teleconverters designed for Canon Autofocus mount can be often be used successfully, but compatibility is not guaranteed.

Extension Tubes

Compatible with EF-12 and EF-25 extension tubes

Case

LH-D18B (Hard Case) LP1022 (Soft Case)

Incompatibilties

EF-M body

The EF-M camera does not have autofocus sensors. All EF lenses operate in manual focus mode only. Ensure that the lens focus mode switch is set to the "MF" position. For IS operation incompatibilities please refer to the table below.

EOS bodies

Image Stabilizer Compatibility Table

	Might affect photograph							Will not affect photograph
Camera Body	AF shot	MF shot	No AF	Popup Flash shot	Using self timer	During Bulb shot		During Frame Advance	Charge popup Flash	After DEP shot	After Bulb shot
EF-M	-	IS OFF	-	-	IS OFF	IS OFF		OK	-	-	IS OFF
650, 630, 600, RT	OK	OK	?	-	?	IS OFF		SHAKE	-	SHAKE	IS ON
620	OK	OK	?	-	?	IS OFF		SHAKE	-	-	IS ON
700, 750	OK	OK	?	OK	?	IS ON		OK	SHAKE	OK	IS ON
850	OK	OK	?	-	?	-		OK	-	OK	-
1	OK	OK	?	-	?	IS OFF		OK	-	SHAKE	IS ON
1N	OK	OK	?	-	?	IS OFF		OK	-	SHAKE	IS OFF
1NRS	OK	OK	?	-	?	IS OFF		OK	-	-	IS OFF
5, A2, A2E	OK	OK	?	OK	?	IS OFF		OK	OK	shake	IS ON
10, 10S	OK	OK	?	OK	?	IS OFF		SHAKE	SHAKE	SHAKE	IS ON
100, 100P, Elan	OK	OK	?	OK	?	IS OFF		SHAKE	SHAKE	SHAKE	IS ON
Camera Body	AF shot	MF shot	No AF	Popup Flash shot	Using self timer	During Bulb shot		During Frame Advance	Charge popup Flash	After DEP shot	After Bulb shot
50, 50E, 55, Elan II, Elan IIE	OK	OK	?	OK	OK	IS OFF		OK	OK	OK	IS OFF
30, 33, 7, Elan 7, Elan 7E	OK	OK	?	OK	OK	IS OFF		OK	OK	OK	IS OFF
1000, 1000F,Rebel, Rebel S	OK	OK	?	OK	IS ON	IS ON		OK	SHAKE	OK	IS ON
1000N, 1000FN, 1000S, Rebel II, Rebel SII	OK	OK	?	OK	IS ON	IS ON		OK	SHAKE	OK	IS ON
500, Rebel XS, Kiss	OK	OK	?	OK	?	IS ON		OK	shake	OK	IS ON
500N, Rebel G, New Kiss	OK	OK	?	OK	?	IS OFF		OK	shake	OK	IS OFF
300, Rebel 2000, Kiss III	OK	OK	?	OK	?	?		OK	?	?	?
IX, IX E, IX Lite, IX 7, IX 50	OK	OK	?	OK	OK	IS OFF		OK	shake	OK	IS OFF
88, 888, 5000, 3000	OK	OK	?	OK	?	IS OFF		OK	OK	-	IS OFF
Camera Body	AF shot	MF shot	No AF	Popup Flash shot	Using self timer	During Bulb shot		During Frame Advance	Charge popup Flash	After DEP shot	After Bulb shot

Notes:

No AF	This usually occurs when the camera detects that the lens mounted has too small an aperture to allow effective autofocus. Autofocus is automatically disabled by the camera in this situation.		shake	The image shakes slightly, but only in the viewfinder, and not on the photograph.
IS ON	The image stabilizer is not usually suitable in this situation. Remember to switch the Image Stabilizer OFF before taking this kind of photograph.		SHAKE	The image shakes a lot, but only in the viewfinder, and not on the photograph.
IS OFF	The image stabilizer is not usually suitable in this situation, and the camera automatically disables the Image Stabilizer function before taking this kind of photograph.		-	Not applicable, since the camera does not have this function

APS bodies

For IS operation incompatibilities please refer to the table above.

Flash

See above tables relating to built-in flash.

Tripod

Do not use the IS function when using the camera on a tripod or in bulb mode (which is usually on a tripod) as this may cause the IS function to operate erratically.

Do not engage IS mode when panning (following a moving object moving across the photographers field of view)

Precautions

The IS function continues to operate for some time after activation. Do not remove the lens while the IS function is active. Set the "Stabilizer" switch to 0 to ensure that IS is inactive.

Do not rest the lens on the camera mount, otherwise damage can occur to the delicate electronic contacts. When not mounted on a camera the rear lens cap should always be in place to prevent damage to the electrical contacts and the rear glass element of the lens.

Do not disassemble the lens - there are no user serviceable parts inside..

As with all precision electrical and mechanical equipment do not expose the lens to water, particularly salt water.

Do not attempt to mount the lens on any camera body other than a Canon EOS series camera as this could result in damage to both the lens and camera body¹. Please note that earlier model Canon cameras using FD or earlier mounts are also not compatible with EF lenses.

Note 1: Adaptors may be available to allow the use of EF lenses on other camera bodies but care should to taken to ensure that no damage results from their use.

Lens Care

Storage

When not mounted on a camera body, store with the front and rear lens caps in place to prevent accidental scratching or other damage.

Store in dry conditions to prevent the possible build up of fungus between the glass elements of the lens.

Service

There are no user serviceable parts - please return the lens to an authorised Canon service centre for adjustment or repair.

Specifications

Released

September 1995

Dimensions

Maximum Diameter x Length:
78.5mm x 138.2mm / 3.1in x 5.5in

Weight

650g / 1.4lb

Filter Mount

58mm threaded mount for front mounted accessory filters

Optics

15 elements in 10 groups

Focus mechanism

This lens focuses using the front lens elements. The front elements move in and out (i.e backward and forward) during focusing. The front element and the inner lens barrel also rotate during focusing.

Rotating Filter Mount

Because the front elements move and rotate during focusing this lens presents some difficulties when using filters such as polarisers or graduated tints.

Focus Range

1.5 metres / 4.9 feet ~ infinity.

Autofocus Motor

Micro Motor type UltraSonic Motor (USM)

Full Time Manual

Full Time Manual (FTM) focusing is not available with this lens.

Focal Length

75mm ~ 300mm

Magnification

Lens alone	Maximum 0.26
12mm extension	0.32-0.04
25mm extension	0.39-0.09
with 250D lens
with 500/500D lens

Angle of view

for 35mm film

	75mm	300mm
Diagonal	32° 11'	8° 15'
Vertical	18° 11'	4° 35'
Horizontal	27°	6° 50'

Aperture blades

8

Aperture Range

Focal length
75mm		f4~f22
300mm		f5.6~f32

Image Stabilizer

Mode 1 Image Stabilizer (IS) function. The stabilizing effect is equivalent to two stops of shutter speeds. The IS function operates in both AF and MF modes.

Revision History

v0.14b 2002Sep04 jul: minor reformat
Version 0.14   07 Jan 2001   Remove some table formatting plus revisions in some categories. Include Julian Loke's IS incompatibilities table.

Version 0.13   05 Jan 2001   Changes for new version of Lens template plus minor revisions.

Version 0.12   03 Jan 2001   Now uses EOS Documentation Project - Lens template, plus minor revisions.

Version 0.11   28 Dec 2000   Minor corrections and revisions.

Version 0.10   26 Dec 2000   First Draft

Comments

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