Canon 40D vs Panasonic G100
The Canon EOS 40D and the Panasonic Lumix DC-G100 (labelled Panasonic G110 in some countries) are two digital cameras that were officially introduced, respectively, in August 2007 and June 2020. The 40D is a DSLR, while the G100 is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (40D) and a Four Thirds (G100) sensor. The Canon has a resolution of 10.1 megapixels, whereas the Panasonic provides 20.2 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Check 40D offers at
ebay.com

Check G100 price at
amazon.com
Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 40D and the Panasonic Lumix DC-G100? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.
Body comparison
An illustration of the physical size and weight of the Canon 40D and the Panasonic G100 is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth dimensions are rounded to the nearest millimeter.



If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic G100 is considerably smaller (39 percent) than the Canon 40D. Moreover, the G100 is substantially lighter (57 percent) than the 40D. In this context, it is worth noting that neither the 40D nor the G100 are weather-sealed.
The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can compare the optics available for the two cameras in the Canon EF Lens Catalog (40D) and the Micro Four Thirds Lens Catalog (G100). Mirrorless cameras, such as the G100, have moreover the advantage that they can use many lenses from other systems via adapters, as they have a relatively short flange to focal plane distance.
Concerning battery life, the 40D gets 750 shots out of its Canon BP-511A battery, while the G100 can take 270 images on a single charge of its Panasonic DMW-BLG10 power pack. The power pack in the G100 can be charged via the USB port, which can be very convenient when travelling.
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

| Camera Model |
Camera Width |
Camera Height |
Camera Depth |
Camera Weight |
Battery Life |
Weather Sealing |
Camera Launch |
Launch Price |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Canon 40D | 146 mm | 108 mm | 74 mm | 822 g | 750 | n | Aug 2007 | US$ 1 299 | ebay.com | |
| 2. | Panasonic G100 | 116 mm | 83 mm | 54 mm | 352 g | 270 | n | Jun 2020 | US$ 649 | amazon.com | |
| 3. | Canon 10D | 150 mm | 107 mm | 75 mm | 850 g | 500 | n | Feb 2003 | US$ 1 999 | ebay.com | |
| 4. | Canon 20D | 144 mm | 106 mm | 72 mm | 770 g | 700 | n | Aug 2004 | US$ 1 499 | ebay.com | |
| 5. | Canon 30D | 144 mm | 106 mm | 74 mm | 785 g | 750 | n | Feb 2006 | US$ 1 399 | ebay.com | |
| 6. | Canon 50D | 146 mm | 108 mm | 74 mm | 822 g | 800 | Y | Aug 2008 | US$ 1 299 | ebay.com | |
| 7. | Canon 60D | 145 mm | 106 mm | 79 mm | 755 g | 1100 | Y | Aug 2010 | US$ 1 399 | ebay.com | |
| 8. | Canon T3 | 130 mm | 100 mm | 78 mm | 495 g | 700 | n | Feb 2011 | US$ 449 | ebay.com | |
| 9. | Canon XS | 126 mm | 98 mm | 65 mm | 502 g | 500 | n | Jun 2008 | US$ 449 | ebay.com | |
| 10. | Canon XSi | 129 mm | 98 mm | 62 mm | 524 g | 500 | n | Jan 2008 | US$ 799 | ebay.com | |
| 11. | Canon XTi | 127 mm | 84 mm | 65 mm | 556 g | 370 | n | Aug 2006 | US$ 799 | ebay.com | |
| 12. | Nikon D90 | 132 mm | 103 mm | 77 mm | 703 g | 850 | n | Aug 2008 | US$ 1 299 | ebay.com | |
| 13. | Panasonic G3 | 115 mm | 84 mm | 47 mm | 336 g | 270 | n | May 2011 | US$ 599 | ebay.com | |
| 14. | Panasonic G5 | 120 mm | 83 mm | 71 mm | 396 g | 320 | n | Jul 2012 | US$ 599 | ebay.com | |
| 15. | Panasonic G6 | 122 mm | 85 mm | 71 mm | 390 g | 340 | n | Apr 2013 | US$ 599 | ebay.com | |
| 16. | Panasonic G7 | 125 mm | 86 mm | 77 mm | 410 g | 350 | n | May 2015 | US$ 649 | ebay.com | |
| 17. | Panasonic GX1 | 116 mm | 68 mm | 39 mm | 318 g | 320 | n | Nov 2011 | US$ 699 | ebay.com | |
| Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders. | |||||||||||
The price is, of course, an important factor in any camera decision. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The G100 was launched at a markedly lower price (by 50 percent) than the 40D, which puts it into a different market segment. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.
Sensor comparison
The imaging sensor is at the core of digital cameras and its size is one of the main determining factors of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units in a sensor of the same technological generation. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to isolate a subject from the background. On the downside, larger sensors tend to be associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Canon 40D features an APS-C sensor and the Panasonic G100 a Four Thirds sensor. The sensor area in the G100 is 32 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.6 and 2.0. The sensor in the 40D has a native 3:2 aspect ratio, while the one in the G100 offers a 4:3 aspect.

Despite having a smaller sensor, the G100 offers a higher resolution of 20.2 megapixels, compared with 10.1 MP of the 40D. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.34μm versus 5.73μm for the 40D). However, it should be noted that the G100 is much more recent (by 12 years and 10 months) than the 40D, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently. Coming back to sensor resolution, it should be mentioned that the G100 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Panasonic G100 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the G100 for good quality output (200 dots per inch) amounts to 25.9 x 19.4 inches or 65.8 x 49.4 cm, for very good quality (250 dpi) 20.7 x 15.6 inches or 52.7 x 39.5 cm, and for excellent quality (300 dpi) 17.3 x 13 inches or 43.9 x 32.9 cm. The corresponding values for the Canon 40D are 19.4 x 13 inches or 49.4 x 32.9 cm for good quality, 15.6 x 10.4 inches or 39.5 x 26.3 cm for very good quality, and 13 x 8.6 inches or 32.9 x 21.9 cm for excellent quality prints.
The Canon EOS 40D has a native sensitivity range from ISO 100 to ISO 1600, which can be extended to ISO 100-3200. The corresponding ISO settings for the Panasonic Lumix DC-G100 are ISO 200 to ISO 25600, with the possibility to increase the ISO range to 100-25600.
In terms of underlying technology, the 40D is build around a CMOS sensor, while the G100 uses a Live MOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

| Camera Model |
Sensor Class |
Resolution (MP) |
Horiz. Pixels |
Vert. Pixels |
Video Format |
DXO Portrait |
DXO Landscape |
DXO Sports |
DXO Overall |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Canon 40D | APS-C | 10.1 | 3888 | 2592 | none | 22.1 | 11.3 | 703 | 64 | |
| 2. | Panasonic G100 | Four Thirds | 20.2 | 5184 | 3888 | 4K/30p | 23.3 | 13.2 | 1391 | 76 | |
| 3. | Canon 10D | APS-C | 6.3 | 3072 | 2048 | none | 21.1 | 10.9 | 571 | 57 | |
| 4. | Canon 20D | APS-C | 8.2 | 3504 | 2336 | none | 21.9 | 11.0 | 721 | 62 | |
| 5. | Canon 30D | APS-C | 8.2 | 3504 | 2336 | none | 21.5 | 10.8 | 736 | 59 | |
| 6. | Canon 50D | APS-C | 15.1 | 4752 | 3168 | none | 21.8 | 11.4 | 696 | 63 | |
| 7. | Canon 60D | APS-C | 17.9 | 5184 | 3456 | 1080/30p | 22.2 | 11.5 | 813 | 66 | |
| 8. | Canon T3 | APS-C | 12.2 | 4272 | 2848 | 720/30p | 21.9 | 11.0 | 755 | 62 | |
| 9. | Canon XS | APS-C | 10.1 | 3888 | 2592 | none | 22.0 | 10.9 | 719 | 62 | |
| 10. | Canon XSi | APS-C | 12.2 | 4272 | 2848 | none | 21.9 | 10.8 | 692 | 61 | |
| 11. | Canon XTi | APS-C | 10.1 | 3888 | 2592 | none | 22.1 | 11.0 | 664 | 62 | |
| 12. | Nikon D90 | APS-C | 12.2 | 4288 | 2848 | 720/24p | 22.7 | 12.5 | 977 | 73 | |
| 13. | Panasonic G3 | Four Thirds | 15.8 | 4592 | 3448 | 1080/60i | 21.0 | 10.6 | 667 | 56 | |
| 14. | Panasonic G5 | Four Thirds | 15.9 | 4608 | 3456 | 1080/60p | 21.4 | 11.6 | 618 | 61 | |
| 15. | Panasonic G6 | Four Thirds | 15.9 | 4608 | 3456 | 1080/60p | 21.3 | 11.5 | 639 | 61 | |
| 16. | Panasonic G7 | Four Thirds | 15.8 | 4592 | 3448 | 4K/30p | 22.8 | 12.4 | 904 | 71 | |
| 17. | Panasonic GX1 | Four Thirds | 15.8 | 4592 | 3448 | 1080/60p | 20.8 | 10.6 | 703 | 55 | |
| Note: DXO values in italics represent estimates based on sensor size and age. | |||||||||||
Many modern cameras are not only capable of taking still images, but also of capturing video footage. The G100 indeed provides for movie recording, while the 40D does not. The highest resolution format that the G100 can use is 4K/30p.
Feature comparison
Beyond body and sensor, cameras can and do differ across a range of features. For example, the G100 has an electronic viewfinder (3680k dots), while the 40D has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The viewfinder in the G100 offers a wider field of view (100%) than the one in the 40D (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the G100 has a higher magnification (0.73x vs 0.59x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Canon 40D, the Panasonic G100, and comparable cameras.

| Camera Model |
Viewfinder (Type or 000 dots) |
Control Panel (yes/no) |
LCD Specifications (inch/000 dots) |
LCD Attach- ment |
Touch Screen (yes/no) |
Max Shutter Speed * |
Max Shutter Flaps * |
Built-in Flash (yes/no) |
Built-in Image Stab |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Canon 40D | optical | Y | 3.0 / 230 | fixed | n | 1/8000s | 6.5/s | Y | n | |
| 2. | Panasonic G100 | 3680 | n | 3.0 / 1840 | swivel | Y | 1/500s | 10.0/s | Y | n | |
| 3. | Canon 10D | optical | Y | 1.8 / 118 | fixed | n | 1/4000s | 3.0/s | Y | n | |
| 4. | Canon 20D | optical | Y | 1.8 / 118 | fixed | n | 1/8000s | 5.0/s | Y | n | |
| 5. | Canon 30D | optical | Y | 2.5 / 230 | fixed | n | 1/8000s | 5.0/s | Y | n | |
| 6. | Canon 50D | optical | Y | 3.0 / 920 | fixed | n | 1/8000s | 6.3/s | Y | n | |
| 7. | Canon 60D | optical | Y | 3.0 / 1040 | swivel | n | 1/8000s | 5.3/s | Y | n | |
| 8. | Canon T3 | optical | n | 2.7 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
| 9. | Canon XS | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
| 10. | Canon XSi | optical | n | 3.0 / 230 | fixed | n | 1/4000s | 3.5/s | Y | n | |
| 11. | Canon XTi | optical | n | 2.5 / 230 | fixed | n | 1/4000s | 3.0/s | Y | n | |
| 12. | Nikon D90 | optical | Y | 3.0 / 920 | fixed | n | 1/4000s | 4.5/s | Y | n | |
| 13. | Panasonic G3 | 1440 | n | 3.0 / 460 | swivel | Y | 1/4000s | 4.0/s | Y | n | |
| 14. | Panasonic G5 | 1440 | n | 3.0 / 920 | swivel | Y | 1/4000s | 6.0/s | Y | n | |
| 15. | Panasonic G6 | 1440 | n | 3.0 / 1036 | swivel | Y | 1/4000s | 7.0/s | Y | n | |
| 16. | Panasonic G7 | 2360 | n | 3.0 / 1040 | swivel | Y | 1/4000s | 7.0/s | Y | n | |
| 17. | Panasonic GX1 | optional | n | 3.0 / 460 | fixed | Y | 1/4000s | 4.2/s | Y | n | |
| Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one. | |||||||||||
One feature that is present on the 40D, but is missing on the G100 is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.
The G100 has an articulated screen that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in taking selfies. In contrast, the 40D does not have a selfie-screen.The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the G100 is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).
The Panasonic G100 has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.
The 40D writes its imaging data to Compact Flash cards, while the G100 uses SDXC cards.
Connectivity comparison
For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Canon EOS 40D and Panasonic Lumix DC-G100 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

| Camera Model |
Hotshoe Port |
Internal Mic / Speaker |
Microphone Port |
Headphone Port |
HDMI Port |
USB Port |
WiFi Support |
NFC Support |
Bluetooth Support |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Canon 40D | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 2. | Panasonic G100 | Y | stereo / mono | Y | Y | micro | 2.0 | Y | - | Y | |
| 3. | Canon 10D | Y | - / - | - | - | - | 1.1 | - | - | - | |
| 4. | Canon 20D | Y | - / - | - | - | - | 1.1 | - | - | - | |
| 5. | Canon 30D | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 6. | Canon 50D | Y | - / - | - | - | mini | 2.0 | - | - | - | |
| 7. | Canon 60D | Y | mono / mono | Y | - | mini | 2.0 | - | - | - | |
| 8. | Canon T3 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
| 9. | Canon XS | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 10. | Canon XSi | Y | - / - | - | - | mini | 2.0 | - | - | - | |
| 11. | Canon XTi | Y | - / - | - | - | - | 2.0 | - | - | - | |
| 12. | Nikon D90 | Y | mono / mono | - | - | mini | 2.0 | - | - | - | |
| 13. | Panasonic G3 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
| 14. | Panasonic G5 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - | |
| 15. | Panasonic G6 | Y | stereo / mono | Y | - | mini | 2.0 | Y | Y | - | |
| 16. | Panasonic G7 | Y | stereo / mono | Y | - | micro | 2.0 | Y | - | - | |
| 17. | Panasonic GX1 | Y | stereo / mono | - | - | mini | 2.0 | - | - | - |
It is notable that the G100 offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the 40D does not provide wifi capability.
Studio photographers will appreciate that the Canon 40D (unlike the G100) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
The G100 is a recent model that features in the current product line-up of Panasonic. In contrast, the 40D has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the 40D was succeeded by the Canon 50D. Further information on the features and operation of the 40D and G100 can be found, respectively, in the Canon 40D Manual (free pdf) or the online Panasonic G100 Manual.
Review summary
So what is the bottom line? Is there a clear favorite between the Canon 40D and the Panasonic G100? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

Arguments in favor of the Canon EOS 40D:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Easier setting verification: Features an LCD display on top to control shooting parameters.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/500s) to freeze action.
- Longer lasting: Can take more shots (750 versus 270) on a single battery charge.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- More heavily discounted: Has been available for much longer (launched in August 2007).

Reasons to prefer the Panasonic Lumix DC-G100:
- More detail: Has more megapixels (20.2 vs 10.1MP), which boosts linear resolution by 39%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Broader imaging potential: Can capture not only stills but also 4K/30p video.
- More framing info: Has an electronic viewfinder that displays shooting data.
- More complete view: Has a viewfinder with a larger field of view (100% vs 95%).
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.73x vs 0.59x).
- More detailed LCD: Has a higher resolution rear screen (1840k vs 230k dots).
- More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
- Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Faster burst: Shoots at higher frequency (10 vs 6.5 flaps/sec) to capture the decisive moment.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- More compact: Is smaller (116x83mm vs 146x108mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 470g or 57 percent) and is thus easier to take along.
- Easier travel charging: Can be conveniently charged via its USB port.
- More legacy lens friendly: Can use many non-native lenses via adapters.
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- More affordable: Was introduced into a lower priced category (50 percent cheaper at launch).
- More modern: Reflects 12 years and 10 months of technical progress since the 40D launch.
If the number of relative strengths (bullet points above) is taken as a guide, the G100 is the clear winner of the contest (21 : 7 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape shooter. Hence, the decision which camera is best and worth buying is often a very personal one.
How about other alternatives? Do the specifications of the Canon 40D and the Panasonic G100 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings whether the two cameras rank among the cream of the crop.
In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the 40D or the G100. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.
Expert reviews
This is why hands-on reviews by experts are important. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

| Camera Model |
AP score |
CL score |
DCW score |
DPR score |
EPZ score |
PB score |
Camera Launch |
Launch Price |
Street Price |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Canon 40D | .. | + + | .. | + + | 4.5/5 | 4.5/5 | Aug 2007 | US$ 1 299 | ebay.com | |
| 2. | Panasonic G100 | 4/5 | .. | 4/5 | 78/100 | 4/5 | 4/5 | Jun 2020 | US$ 649 | amazon.com | |
| 3. | Canon 10D | .. | .. | .. | + + | .. | .. | Feb 2003 | US$ 1 999 | ebay.com | |
| 4. | Canon 20D | .. | .. | .. | + + | .. | .. | Aug 2004 | US$ 1 499 | ebay.com | |
| 5. | Canon 30D | .. | + + | .. | + + | o | .. | Feb 2006 | US$ 1 399 | ebay.com | |
| 6. | Canon 50D | .. | + + | .. | + + | 4.5/5 | 4.5/5 | Aug 2008 | US$ 1 299 | ebay.com | |
| 7. | Canon 60D | 5/5 | + | .. | 79/100 | 4/5 | 4.5/5 | Aug 2010 | US$ 1 399 | ebay.com | |
| 8. | Canon T3 | .. | 80/100 | .. | 69/100 | 4/5 | 4.5/5 | Feb 2011 | US$ 449 | ebay.com | |
| 9. | Canon XS | .. | 82/100 | .. | + + | 3.5/5 | 4.5/5 | Jun 2008 | US$ 449 | ebay.com | |
| 10. | Canon XSi | .. | + + | .. | + + | 4/5 | 4.5/5 | Jan 2008 | US$ 799 | ebay.com | |
| 11. | Canon XTi | .. | + + | .. | + + | o | 4/5 | Aug 2006 | US$ 799 | ebay.com | |
| 12. | Nikon D90 | .. | + + | .. | + + | 4/5 | 4.5/5 | Aug 2008 | US$ 1 299 | ebay.com | |
| 13. | Panasonic G3 | 3/5 | + + | .. | 75/100 | 4.5/5 | 5/5 | May 2011 | US$ 599 | ebay.com | |
| 14. | Panasonic G5 | 3/5 | + + | .. | .. | 4.5/5 | 4.5/5 | Jul 2012 | US$ 599 | ebay.com | |
| 15. | Panasonic G6 | 4/5 | + + | .. | .. | 5/5 | 4.5/5 | Apr 2013 | US$ 599 | ebay.com | |
| 16. | Panasonic G7 | 4/5 | + + | 3.5/5 | 80/100 | 5/5 | 4.5/5 | May 2015 | US$ 649 | ebay.com | |
| 17. | Panasonic GX1 | 3/5 | + | .. | 77/100 | 4.5/5 | 4.5/5 | Nov 2011 | US$ 699 | ebay.com | |
| Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available. | |||||||||||
The above review scores should be interpreted with care, though. The assessments were made in relation to similar cameras of the same technological generation. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

Check 40D offers at
ebay.com

Check G100 price at
amazon.com
Other camera comparisons
Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.
- Canon 1300D vs Canon 40D
- Canon 40D vs Canon R
- Canon 40D vs Fujifilm X-M1
- Canon 40D vs Nikon D3000
- Canon 40D vs Olympus TG-5
- Canon 40D vs Panasonic TZ90
- Canon SX30 vs Panasonic G100
- Fujifilm GFX 100S vs Panasonic G100
- Panasonic G100 vs Panasonic G5
- Panasonic G100 vs Panasonic GX80
- Panasonic G100 vs Pentax K-50
- Panasonic G100 vs Pentax WG-8
Specifications: Canon 40D vs Panasonic G100
Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.
| Camera Model | Canon 40D | Panasonic G100 |
|---|---|---|
| Camera Type | Digital single lens reflex | Mirrorless system camera |
| Camera Lens | Canon EF mount lenses | Micro Four Thirds lenses |
| Launch Date | August 2007 | June 2020 |
| Launch Price | USD 1,299 | USD 649 |
| Sensor Specs | Canon 40D | Panasonic G100 |
| Sensor Technology | CMOS | Live MOS |
| Sensor Format | APS-C Sensor | Four Thirds Sensor |
| Sensor Size | 22.3 x 14.9 mm | 17.3 x 13.0 mm |
| Sensor Area | 332.27 mm2 | 224.9 mm2 |
| Sensor Diagonal | 26.8 mm | 21.6 mm |
| Crop Factor | 1.6x | 2.0x |
| Sensor Resolution | 10.1 Megapixels | 20.2 Megapixels |
| Image Resolution | 3888 x 2592 pixels | 5184 x 3888 pixels |
| Pixel Pitch | 5.73 μm | 3.34 μm |
| Pixel Density | 3.03 MP/cm2 | 8.96 MP/cm2 |
| Moiré control | Anti-Alias filter | no AA filter |
| Movie Capability | no Video | 4K/30p Video |
| ISO Setting | 100 - 1,600 ISO | 200 - 25,600 ISO |
| ISO Boost | 100 - 3,200 ISO | 100 - 25,600 ISO |
| Image Processor | DIGIC 3 | Venus |
| DXO Sensor Quality (score) | 64 | .. |
| DXO Color Depth (bits) | 22.1 | .. |
| DXO Dynamic Range (EV) | 11.3 | .. |
| DXO Low Light (ISO) | 703 | .. |
| Screen Specs | Canon 40D | Panasonic G100 |
| Viewfinder Type | Optical viewfinder | Electronic viewfinder |
| Viewfinder Field of View | 95% | 100% |
| Viewfinder Magnification | 0.59x | 0.73x |
| Viewfinder Resolution | 3680k dots | |
| Top-Level Screen | Control Panel | no Top Display |
| LCD Framing | Live View | Live View |
| Rear LCD Size | 3.0inch | 3.0inch |
| LCD Resolution | 230k dots | 1840k dots |
| LCD Attachment | Fixed screen | Swivel screen |
| Touch Input | no Touchscreen | Touchscreen |
| Shooting Specs | Canon 40D | Panasonic G100 |
| Focus System | Phase-detect AF | Contrast-detect AF |
| Manual Focusing Aid | no Peaking Feature | Focus Peaking |
| Max Shutter Speed (mechanical) | 1/8000s | 1/500s |
| Continuous Shooting | 6.5 shutter flaps/s | 10 shutter flaps/s |
| Electronic Shutter | no E-Shutter | up to 1/16000s |
| Time-Lapse Photography | no Intervalometer | Intervalometer built-in |
| Fill Flash | Built-in Flash | Built-in Flash |
| Storage Medium | CF cards | SDXC cards |
| Single or Dual Card Slots | Single card slot | Single card slot |
| Connectivity Specs | Canon 40D | Panasonic G100 |
| External Flash | Hotshoe | Hotshoe |
| Studio Flash | PC Sync socket | no PC Sync |
| USB Connector | USB 2.0 | USB 2.0 |
| HDMI Port | no HDMI | micro HDMI |
| Microphone Port | no MIC socket | External MIC port |
| Headphone Socket | no Headphone port | Headphone port |
| Wifi Support | no Wifi | Wifi built-in |
| Bluetooth Support | no Bluetooth | Bluetooth built-in |
| Body Specs | Canon 40D | Panasonic G100 |
| Battery Type | Canon BP-511A | Panasonic DMW-BLG10 |
| Battery Life (CIPA) | 750 shots per charge | 270 shots per charge |
| In-Camera Charging | no USB charging | USB charging |
| Body Dimensions |
146 x 108 x 74 mm (5.7 x 4.3 x 2.9 in) |
116 x 83 x 54 mm (4.6 x 3.3 x 2.1 in) |
| Camera Weight | 822 g (29.0 oz) | 352 g (12.4 oz) |

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