Unlocking the Power of the Canon EOS 40D: A Guide to Capture Stunning PhotosKeywords: Canon EOS 40D, camera, photography, tips, guide, photos

In this blog post, we will deep dive into the features and functionalities of the Canon EOS 40D camera. We will share essential tips and tricks to help you unlock its power and capture stunning photos. Whether you are a professional photographer or a hobbyist, this guide is perfect to improve your photography game.

Written by Victor Chan | Updated: Mon May 01 2023

Canon EOS 40D article cover photo

Key Features

Oct 24 2007


10 megapixels


Sensor TypeAPS-C

Other similar cameras

Canon EOS 400D thumbnail

Canon EOS 400D

Released Oct 14 2006 | 10MP resolution

Canon EOS 4000D thumbnail

Canon EOS 4000D

Released Feb 26 2018 | 18MP resolution

Canon EOS 450D thumbnail

Canon EOS 450D

Released May 23 2008 | 12MP resolution

Overview of the EOS 40D

Are you looking for a powerful camera that can help you capture stunning photos? Look no further than the Canon EOS 40D. This camera boasts of advanced features that were previously available only on professional-grade cameras. From a high-resolution sensor to rapid burst shooting, the Canon EOS 40D has everything you need to capture stunning photographs. In this blog post, we will walk you through the essential tips and tricks to help you unlock the power of this amazing camera. So, let's get started.

Canon EOS 40D Pros and Cons

Now, we will look more closely at our review of the Canon EOS 40D camera. We will see what it can do and compare it to other cameras like it. We will tell you what's good about it and what's not so good. This way, you'll know if it's the camera for you!


High-resolution image quality
Fast autofocus system
Large and bright 3-inch LCD screen
Wide range of compatible lenses
Durable and weather-resistant build
Accurate color reproduction
Good low-light performance
Excellent battery life
Versatile shooting modes and options


Expensive compared to entry-level DSLRs
No video recording capability
Limited ISO range compared to newer models
Slow burst shooting mode
Outdated Live View system
Bulky and heavy body
Limited dynamic range
No built-in Wi-Fi or GPS
No image stabilization feature.

Build and Construction

Body and dimensions

Canon EOS 40D

Weather sealed
Dimensions146 x 108 x 74mm

Weather Sealing

The Canon EOS 40D camera is equipped with environmental seals that make it resistant to weather, preventing water and dust from entering the camera. If you enjoy outdoor photography and need a camera that can handle extreme conditions, the EOS 40D is an excellent choice.

Design and Handling

Main design features

View FinderOptical (pentaprism)
Screen TypeFixed Type
Screen Resolution230k dots
Body typeMid-size SLR

Suitable for:

PhotographyAbove Avg.
VideographyAbove Avg.
TravelAbove Avg.

LCD Screen

This camera has a fixed type 3.00" screen, with a display resolution of 230k dots. This makes the Canon EOS 40D not as suitable for those looking for a vlogging camera as you cannot view yourself while shooting selfies easily. Unfortunately, the camera does not have a touch screen, which may make it less user-friendly.


EOS 40D includes a optical (pentaprism) viewfinder with no electronic viewfinder of resolution with a coverage of 95% and a magnification of 0.6x. This feature enhances the camera's suitability for outdoor photography in bright conditions.

Image Quality

Canon EOS 40D has a 10MP sized CMOS sensor. You can shoot at maximum resolution of 10 pixels. Canon EOS 40D has a native ISO range of 100 - 1600 which can be boosted to null - 3200. It can also save files in RAW format which gives you a wider room for post processing.

Key Features

Oct 24 2007


100 - 1600

ISO Range

Extended ISOnull - 3200
Max resolution3888 x 2592 pixels

DXO Sensor Scores


64 / 102

Color Depth

22.1 / 26.5

Dynamic Range

11.3 / 14.8

Low Light ISO

703 / 4505

DXO mark sensor scores

The DXOmark rankings indicate that the Canon EOS 40D camera has above average color depth performance, which refers to the number of colors the sensor can distinguish. Additionally, its dynamic range is also average, allowing it to retain low amounts of details in both bright and dark areas of a scene. The camera's low light ISO performance is poor, which is an important factor to consider if you plan to use it in dimly lit indoor environments or at night. Overall the image quality of the EOS 40D is below average

Crop Factor

Camera crop factor (or focal length multiplier) refers to how a camera's sensor size affects the apparent field of view of a lens. Crop factor is determined by comparing the size of a camera's sensor to that of a full-frame sensor, which is a standard reference size for camera sensors.

Size comparison

Medium FormatFull FrameAPS-C (Sony, Nikon)

Crop factor calculator

Crop factor


Full frame equivalent


This camera: APS-C



Connectivity, storage, battery

StorageCompact Flash (Type I or II)
Battery Life800 shots
Battery Model
Wireless Connectivity


The Canon EOS 40D supports Compact Flash (Type I or II) with 1 slots for storage. This may suffice for everyday use. However, for professional applications such as wedding photography, it is not recommended as a memory card malfunction could lead to the loss of all footage.


The Canon EOS 40D uses the undefined model of battery pack. This is rated for 800 shots shots which is high. If you intend to take photos or record videos for an extended period, it might be a good idea to bring along additional batteries.

Photography Features


The Canon EOS 40D has built in flash which is great for event photography and in low light situations. It also offers a flash shoe that allows you to attach external flashes. This provides more versatility in your lighting choices.


The Canon EOS 40D boasts a maximum mechanical shutter speed of 1/8000s, which is ideal for shooting fast-moving subjects in bright environments, such as in sports photography. Faster shutter speeds enable you to freeze the action and capture every detail, making it easier to get the perfect shot.

With a continuous mechanical shutter speed of n/a or an electronic shutter speed of n/a, this camera is not capable of capturing the perfect moment more easily, making it not as suited for wedding, sports, and wildlife photography. Higher shutter speeds make it easier to capture fast-paced action, ensuring that you never miss the perfect shot.


The Canon EOS 40D includes phase detection autofocus (AF), with 9 number of focus points.

While contrast detection is generally more accurate and precise, phase detection autofocus is faster and more effective in most situations, particularly when photographing moving subjects.

Phase detection autofocus works by dividing the incoming light into pairs and then analyzing how they intersect on the camera's sensor. This method allows the camera to determine not only if a subject is in focus but also the direction and distance needed to adjust the focus to achieve perfect sharpness.

On the other hand, contrast detection autofocus works by analyzing the contrast of an image and adjusting the focus until the highest contrast is detected. While this method is very accurate, it can be slow, especially in low light conditions or when photographing moving subjects.

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What is the sensor size of the Canon EOS 40D?

The Canon EOS 40D features a CMOS sensor

Is the Canon EOS 40D weather sealed?

Yes the EOS 40D does have weather sealing.

When was the Canon EOS 40D announced?

The Canon EOS 40D was announced on Oct 24 2007

Does the Canon EOS 40D have in-body image stabilization?

No the EOS 40D does not have in-body image stabilization that can compensate for camera shake, making it easier to shoot handheld in low light conditions.

What is the ISO range of the Canon EOS 40D?

The EOS 40D has a native ISO range of 100-1600, which can be expanded to ISO null-3200 for even greater sensitivity in low light conditions.

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