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Canon 40D vs Panasonic G3

The Canon EOS 40D and the Panasonic Lumix DMC-G3 are two digital cameras that were officially introduced, respectively, in August 2007 and May 2011. The 40D is a DSLR, while the G3 is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (40D) and a Four Thirds (G3) sensor. The Canon has a resolution of 10.1 megapixels, whereas the Panasonic provides 15.8 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Canon 40D
versus
Panasonic G3
Canon 40D   Panasonic G3
Digital single lens reflex Mirrorless system camera
Canon EF mount lenses Micro Four Thirds lenses
10.1 MP – APS-C sensor 15.8 MP – Four Thirds sensor
no Video 1080/60i Video
ISO 100-1,600 (100 - 3,200) ISO 160-6,400
Optical viewfinder Electronic viewfinder (1440k dots)
3.0" LCD – 230k dots 3.0" LCD – 460k dots
Fixed screen (not touch-sensitive) Swivel touchscreen
6.5 shutter flaps per second 4 shutter flaps per second
750 shots per battery charge270 shots per battery charge
146 x 108 x 74 mm, 822 g 115 x 84 x 47 mm, 336 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Canon EOS 40D and the Panasonic Lumix DMC-G3? 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.

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Body comparison

The physical size and weight of the Canon 40D and the Panasonic G3 are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth measures are rounded to the nearest millimeter.

The G3 can be obtained in four different colors (black, brown, red, white), while the 40D is only available in black.

Size Canon 40D vs Panasonic G3
Compare 40D versus G3 top
Comparison 40D or G3 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic G3 is considerably smaller (39 percent) than the Canon 40D. Moreover, the G3 is substantially lighter (59 percent) than the 40D. In this context, it is worth noting that neither the 40D nor the G3 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 (G3). Mirrorless cameras, such as the G3, 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 BP-511A battery, while the G3 can take 270 images on a single charge of its DMW-BLD10 power pack.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.

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Body Specifications
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Canon 40D 146 mm 108 mm 74 mm 822 g 750 n Aug 2007 1,299ebay.com
2.
 
Panasonic G3 115 mm 84 mm 47 mm 336 g 270 n May 2011 599ebay.com
3.
 
Canon T3 130 mm 100 mm 78 mm 495 g 700 n Feb 2011 449ebay.com
4.
 
Canon 60D 145 mm 106 mm 79 mm 755 g 1100 Y Aug 2010 1,399ebay.com
5.
 
Canon 50D 146 mm 108 mm 74 mm 822 g 800 Y Aug 2008 1,299ebay.com
6.
 
Canon XS 126 mm 98 mm 65 mm 502 g 500 n Jun 2008 449ebay.com
7.
 
Canon XSi 129 mm 98 mm 62 mm 524 g 500 n Jan 2008 799ebay.com
8.
 
Canon 30D 144 mm 106 mm 74 mm 785 g 750 n Feb 2006 1,399ebay.com
9.
 
Canon XTi 127 mm 84 mm 65 mm 556 g 370 n Aug 2006 799ebay.com
10.
 
Canon 20D 144 mm 106 mm 72 mm 770 g 700 n Aug 2004 1,499ebay.com
11.
 
Canon 10D 150 mm 107 mm 75 mm 850 g 500 n Feb 2003 1,999ebay.com
12.
 
Nikon D90 132 mm 103 mm 77 mm 703 g 850 n Aug 2008 1,299ebay.com
13.
 
Panasonic G6 122 mm 85 mm 71 mm 390 g 340 n Apr 2013 599ebay.com
14.
 
Panasonic G5 120 mm 83 mm 71 mm 396 g 320 n Jul 2012 599ebay.com
15.
 
Panasonic GX1 116 mm 68 mm 39 mm 318 g 320 n Nov 2011 699ebay.com
16.
 
Panasonic G2 124 mm 84 mm 74 mm 428 g 360 n Mar 2010 599ebay.com
17.
 
Panasonic GH2 124 mm 90 mm 76 mm 442 g 330 n Sep 2010 899ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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Any camera decision will obviously take relative prices into account. 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 G3 was launched at a markedly lower price (by 54 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.

Sensor comparison

The size of the imaging sensor is a crucial determinant 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 more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Canon 40D features an APS-C sensor and the Panasonic G3 a Four Thirds sensor. The sensor area in the G3 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 G3 offers a 4:3 aspect.

Canon 40D and Panasonic G3 sensor measures

Despite having a smaller sensor, the G3 offers a higher resolution of 15.8 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 3.77μm versus 5.73μm for the 40D). However, it should be noted that the G3 is much more recent (by 3 years and 8 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.

The resolution advantage of the Panasonic G3 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the G3 for good quality output (200 dots per inch) amounts to 23 x 17.2 inches or 58.3 x 43.8 cm, for very good quality (250 dpi) 18.4 x 13.8 inches or 46.7 x 35 cm, and for excellent quality (300 dpi) 15.3 x 11.5 inches or 38.9 x 29.2 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 DMC-G3 are ISO 160 to ISO 6400 (no boost).

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

40D versus G3 MP

For many cameras, data on sensor performance has been reported by DXO Mark. 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"). Of the two cameras under review, the 40D has a notably higher overall DXO score than the G3 (overall score 8 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 1.1 bits higher color depth, 0.7 EV in additional dynamic range, and 0.1 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

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Sensor Characteristics
# image 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 2592none22.111.370364
2.
 
Panasonic G3 Four Thirds 15.8 4592 34481080/60i21.010.666756
3.
 
Canon T3 APS-C 12.2 4272 2848720/30p21.911.075562
4.
 
Canon 60D APS-C 17.9 5184 34561080/30p22.211.581366
5.
 
Canon 50D APS-C 15.1 4752 3168none21.811.469663
6.
 
Canon XS APS-C 10.1 3888 2592none22.010.971962
7.
 
Canon XSi APS-C 12.2 4272 2848none21.910.869261
8.
 
Canon 30D APS-C 8.2 3504 2336none21.510.873659
9.
 
Canon XTi APS-C 10.1 3888 2592none22.111.066462
10.
 
Canon 20D APS-C 8.2 3504 2336none21.911.072162
11.
 
Canon 10D APS-C 6.3 3072 2048none21.110.957157
12.
 
Nikon D90 APS-C 12.2 4288 2848720/24p22.712.597773
13.
 
Panasonic G6 Four Thirds 15.9 4608 34561080/60p21.311.563961
14.
 
Panasonic G5 Four Thirds 15.9 4608 34561080/60p21.411.661861
15.
 
Panasonic GX1 Four Thirds 15.8 4592 34481080/60p20.810.670355
16.
 
Panasonic G2 Four Thirds 12.0 4000 3000720/30p21.210.349353
17.
 
Panasonic GH2 Four Thirds 15.9 4608 34561080/60i21.211.365560
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Many modern cameras are not only capable of taking still images, but can also record movies. The G3 indeed provides for movie recording, while the 40D does not. The highest resolution format that the G3 can use is 1080/60i.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the G3 has an electronic viewfinder (1440k 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 G3 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 G3 has a higher magnification (0.70x vs 0.59x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The table below summarizes some of the other core capabilities of the Canon 40D and Panasonic G3 in connection with corresponding information for a sample of similar cameras.

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Core Features
# image 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 40Doptical Y3.0 / 230 fixed n 1/8000s 6.5/s Y n
2.
 
Panasonic G31440 n3.0 / 460 swivel Y 1/4000s 4.0/s Y n
3.
 
Canon T3optical n2.7 / 230 fixed n 1/4000s 3.0/s Y n
4.
 
Canon 60Doptical Y3.0 / 1040 swivel n 1/8000s 5.3/s Y n
5.
 
Canon 50Doptical Y3.0 / 920 fixed n 1/8000s 6.3/s Y n
6.
 
Canon XSoptical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
7.
 
Canon XSioptical n3.0 / 230 fixed n 1/4000s 3.5/s Y n
8.
 
Canon 30Doptical Y2.5 / 230 fixed n 1/8000s 5.0/s Y n
9.
 
Canon XTioptical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
10.
 
Canon 20Doptical Y1.8 / 118 fixed n 1/8000s 5.0/s Y n
11.
 
Canon 10Doptical Y1.8 / 118 fixed n 1/4000s 3.0/s Y n
12.
 
Nikon D90optical Y3.0 / 920 fixed n 1/4000s 4.5/s Y n
13.
 
Panasonic G61440 n3.0 / 1036 swivel Y 1/4000s 7.0/s Y n
14.
 
Panasonic G51440 n3.0 / 920 swivel Y 1/4000s 6.0/s Y n
15.
 
Panasonic GX1optional n3.0 / 460 fixed Y 1/4000s 4.2/s Y n
16.
 
Panasonic G21440 n3.0 / 460 swivel Y 1/4000s 2.6/s Y n
17.
 
Panasonic GH21534 n3.0 / 460 swivel n 1/4000s 3.0/s Y n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
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One feature that is present on the 40D, but is missing on the G3 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 G3 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 40D writes its imaging data to Compact Flash cards, while the G3 uses SDXC cards.

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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 DMC-G3 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Canon 40DY- / ----2.0---
2.
 
Panasonic G3Ystereo / mono--mini2.0---
3.
 
Canon T3Ystereo / mono--mini2.0---
4.
 
Canon 60DYmono / monoY-mini2.0---
5.
 
Canon 50DY- / ---mini2.0---
6.
 
Canon XSY- / ----2.0---
7.
 
Canon XSiY- / ---mini2.0---
8.
 
Canon 30DY- / ----2.0---
9.
 
Canon XTiY- / ----2.0---
10.
 
Canon 20DY- / ----1.1---
11.
 
Canon 10DY- / ----1.1---
12.
 
Nikon D90Ymono / mono--mini2.0---
13.
 
Panasonic G6Ystereo / monoY-mini2.0YY-
14.
 
Panasonic G5Ystereo / mono--mini2.0---
15.
 
Panasonic GX1Ystereo / mono--mini2.0---
16.
 
Panasonic G2Ystereo / mono--mini2.0---
17.
 
Panasonic GH2Ystereo / monoY-mini2.0---
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Studio photographers will appreciate that the Canon 40D (unlike the G3) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the 40D and the G3 have been discontinued, but can regularly be found used on ebay. The 40D was replaced by the Canon 50D, while the G3 was followed by the Panasonic G5. Further information on the features and operation of the 40D and G3 can be found, respectively, in the Canon 40D Manual (free pdf) or the online Panasonic G3 Manual.

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Review summary

So what is the bottom line? Which of the two cameras – the Canon 40D or the Panasonic G3 – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

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Reasons to prefer the Canon EOS 40D:

  • Better image quality: Scores markedly higher (8 points) in the DXO overall assessment.
  • Richer colors: Generates images with noticeably better colors (1.1 bits more color depth).
  • More dynamic range: Captures a larger spectrum of light and dark details (0.7 EV of extra DR).
  • 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 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (6.5 vs 4 flaps/sec) to capture the decisive moment.
  • 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).

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Advantages of the Panasonic Lumix DMC-G3:

  • More detail: Has more megapixels (15.8 vs 10.1MP), which boosts linear resolution by 23%.
  • Broader imaging potential: Can capture not only stills but also 1080/60i 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 (0.70x vs 0.59x).
  • More detailed LCD: Has a higher resolution rear screen (460k 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.
  • More compact: Is smaller (115x84mm vs 146x108mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 486g or 59 percent) and is thus easier to take along.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • More affordable: Was introduced into a lower priced category (54 percent cheaper at launch).
  • More modern: Reflects 3 years and 8 months of technical progress since the 40D launch.

If the number of relative strengths (bullet points above) is taken as a guide, the G3 is the clear winner of the contest (14 : 10 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 wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

40D 10:14 G3

How about other alternatives? Do the specifications of the Canon 40D and the Panasonic G3 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 specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the 40D or the G3 perform in practice. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why expert reviews 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.

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Expert Camera Reviews
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Canon 40D..+ +..+ +4.5/54.5/5 Aug 2007 1,299ebay.com
2.
 
Panasonic G33/5+ +..75/1004.5/55/5 May 2011 599ebay.com
3.
 
Canon T3..80/100..69/1004/54.5/5 Feb 2011 449ebay.com
4.
 
Canon 60D5/5+..79/1004/54.5/5 Aug 2010 1,399ebay.com
5.
 
Canon 50D..+ +..+ +4.5/54.5/5 Aug 2008 1,299ebay.com
6.
 
Canon XS..82/100..+ +3.5/54.5/5 Jun 2008 449ebay.com
7.
 
Canon XSi..+ +..+ +4/54.5/5 Jan 2008 799ebay.com
8.
 
Canon 30D..+ +..+ +o.. Feb 2006 1,399ebay.com
9.
 
Canon XTi..+ +..+ +o4/5 Aug 2006 799ebay.com
10.
 
Canon 20D......+ +.... Aug 2004 1,499ebay.com
11.
 
Canon 10D......+ +.... Feb 2003 1,999ebay.com
12.
 
Nikon D90..+ +..+ +4/54.5/5 Aug 2008 1,299ebay.com
13.
 
Panasonic G64/5+ +....5/54.5/5 Apr 2013 599ebay.com
14.
 
Panasonic G53/5+ +....4.5/54.5/5 Jul 2012 599ebay.com
15.
 
Panasonic GX13/5+..77/1004.5/54.5/5 Nov 2011 699ebay.com
16.
 
Panasonic G2......72/1004/54.5/5 Mar 2010 599ebay.com
17.
 
Panasonic GH25/5+ +..79/1004.5/55/5 Sep 2010 899ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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Care should be taken when interpreting the review scores above, though. The ratings are only valid when referring to cameras in the same category and of the same age. Hence, a score should always be seen in the context of the camera's market launch date and its price, 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.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications: Canon 40D vs Panasonic G3

    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 Specifications
    Camera Model Canon 40D Panasonic G3
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Canon EF mount lenses Micro Four Thirds lenses
    Launch Date August 2007 May 2011
    Launch Price USD 1,299 USD 599
    Sensor Specs Canon 40D Panasonic G3
    Sensor Technology CMOS CMOS
    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 15.8 Megapixels
    Image Resolution 3888 x 2592 pixels 4592 x 3448 pixels
    Pixel Pitch 5.73 μm 3.77 μm
    Pixel Density 3.03 MP/cm2 7.04 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability no Video 1080/60i Video
    ISO Setting 100 - 1,600 ISO 160 - 6,400 ISO
    ISO Boost 100 - 3,200 ISO no Enhancement
    Image Processor DIGIC 3 Venus FHD
    DXO Sensor Quality (score) 64 56
    DXO Color Depth (bits) 22.1 21.0
    DXO Dynamic Range (EV) 11.3 10.6
    DXO Low Light (ISO) 703 667
    Screen Specs Canon 40D Panasonic G3
    Viewfinder Type Optical viewfinder Electronic viewfinder
    Viewfinder Field of View 95% 100%
    Viewfinder Magnification 0.59x 0.70x
    Viewfinder Resolution 1440k 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 460k dots
    LCD Attachment Fixed screen Swivel screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Canon 40D Panasonic G3
    Focus System Phase-detect AF Contrast-detect AF
    Continuous Shooting 6.5 shutter flaps/s 4 shutter flaps/s
    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 G3
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 2.0 USB 2.0
    HDMI Port no HDMI mini HDMI
    Wifi Support no Wifi no Wifi
    Body Specs Canon 40D Panasonic G3
    Battery Type BP-511A DMW-BLD10
    Battery Life (CIPA)750 shots per charge270 shots per charge
    Body Dimensions 146 x 108 x 74 mm
    (5.7 x 4.3 x 2.9 in)
    115 x 84 x 47 mm
    (4.5 x 3.3 x 1.9 in)
    Camera Weight 822 g (29.0 oz) 336 g (11.9 oz)
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