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Olympus E-3 vs Pentax 645D

The Olympus E-3 and the Pentax 645D are two professional cameras that were officially introduced, respectively, in October 2007 and March 2010. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a Four Thirds (E-3) and a medium format (645D) sensor. The Olympus has a resolution of 10 megapixels, whereas the Pentax provides 39.5 MP.

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

Headline Specifications
Olympus E-3
versus
Pentax 645D
Olympus E-3   Pentax 645D
Digital single lens reflex Digital single lens reflex
Four Thirds lenses Pentax 645 mount lenses
10 MP – Four Thirds sensor 39.5 MP – Medium Format sensor
no Video no Video
ISO 100-3,200 ISO 100-1,600
Optical viewfinder Optical viewfinder
2.5" LCD – 230k dots 3.0" LCD – 921k dots
Swivel screen (not touch-sensitive) Fixed screen (not touch-sensitive)
5 shutter flaps per second 1.1 shutter flaps per second
In-body stabilizationLens stabilization only
Weathersealed bodyWeathersealed body
750 shots per battery charge800 shots per battery charge
142 x 116 x 75 mm, 876 g 156 x 117 x 119 mm, 1480 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus E-3 and the Pentax 645D? 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 side-by-side display below illustrates the physical size and weight of the Olympus E-3 and the Pentax 645D. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All size dimensions are rounded to the nearest millimeter.

Size Olympus E-3 vs Pentax 645D
Compare E-3 versus 645D top
Comparison E-3 or 645D rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax 645D is notably larger (11 percent) than the Olympus E-3. Moreover, the 645D is substantially heavier (69 percent) than the E-3. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

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. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

Concerning battery life, the E-3 gets 750 shots out of its Olympus BLM-1 battery, while the 645D can take 800 images on a single charge of its Pentax D-LI90 power pack.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

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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.
 
Olympus E-3 142 mm 116 mm 75 mm 876 g 750 Y Oct 2007 1,699ebay.com
2.
 
Pentax 645D 156 mm 117 mm 119 mm 1480 g 800 Y Mar 2010 9,995ebay.com
3.
 
Canon 1D X 158 mm 168 mm 83 mm 1551 g 1120 Y Oct 2011 6,799ebay.com
4.
 
Canon 1D Mark IV 156 mm 157 mm 80 mm 1230 g 1500 Y Oct 2009 4,999ebay.com
5.
 
Leica S Typ 006 160 mm 120 mm 80 mm 1260 g .. Y Sep 2012 21,950ebay.com
6.
 
Nikon D3S 160 mm 157 mm 88 mm 1240 g 4200 Y Oct 2009 5,199ebay.com
7.
 
Nikon D300 147 mm 114 mm 74 mm 925 g 1000 Y Aug 2007 1,799ebay.com
8.
 
Olympus E-5 142 mm 117 mm 75 mm 873 g 750 Y Sep 2010 1,699ebay.com
9.
 
Olympus E-600 130 mm 94 mm 60 mm 535 g 500 n Aug 2009 449ebay.com
10.
 
Olympus E-620 130 mm 94 mm 60 mm 521 g 500 n Feb 2009 699ebay.com
11.
 
Olympus E-30 142 mm 108 mm 75 mm 701 g 750 n Nov 2008 1,299ebay.com
12.
 
Olympus E-420 130 mm 91 mm 53 mm 440 g 500 n Mar 2008 599ebay.com
13.
 
Olympus E-520 136 mm 92 mm 68 mm 535 g 750 n May 2008 699ebay.com
14.
 
Olympus E-410 130 mm 91 mm 53 mm 435 g 500 n Mar 2007 699ebay.com
15.
 
Olympus E-510 136 mm 92 mm 68 mm 538 g 750 n Mar 2007 799ebay.com
16.
 
Olympus E-1 141 mm 104 mm 81 mm 738 g 750 Y Jun 2003 1,699ebay.com
17.
 
Pentax 645Z 156 mm 117 mm 123 mm 1550 g 650 Y Apr 2014 8,499ebay.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 retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The E-3 was launched at a markedly lower price (by 83 percent) than the 645D, 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 imaging sensor is at the core of digital cameras and its size is one of the main determining factors of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its 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 Olympus E-3 features a Four Thirds sensor and the Pentax 645D a medium format sensor. The sensor area in the 645D is 545 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 0.79. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

Olympus E-3 and Pentax 645D sensor measures

With 39.5MP, the 645D offers a higher resolution than the E-3 (10MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 4.74μm for the E-3) due to its larger sensor. Moreover, the 645D is a much more recent model (by 2 years and 4 months) than the E-3, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the 645D has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Pentax 645D implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 645D for good quality output (200 dots per inch) amounts to 36.3 x 27.2 inches or 92.3 x 69.1 cm, for very good quality (250 dpi) 29.1 x 21.8 inches or 73.8 x 55.3 cm, and for excellent quality (300 dpi) 24.2 x 18.1 inches or 61.5 x 46.1 cm. The corresponding values for the Olympus E-3 are 18.2 x 13.7 inches or 46.3 x 34.7 cm for good quality, 14.6 x 10.9 inches or 37.1 x 27.8 cm for very good quality, and 12.2 x 9.1 inches or 30.9 x 23.2 cm for excellent quality prints.

The Olympus E-3 has a native sensitivity range from ISO 100 to ISO 3200. The corresponding ISO settings for the Pentax 645D are ISO 100 to ISO 1600 (no boost).

In terms of underlying technology, the E-3 is build around a CMOS sensor, while the 645D uses a CCD 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.

E-3 versus 645D MP

For many cameras, data on sensor performance has been reported by DXO Mark. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. Of the two cameras under consideration, the 645D offers substantially better image quality than the E-3 (overall score 26 points higher). The advantage is based on 3 bits higher color depth, 2.1 EV in additional dynamic range, and 1.1 stops in additional low light sensitivity. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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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.
 
Olympus E-3 Four Thirds 10.0 3648 2736none21.610.557156
2.
 
Pentax 645D Medium Format 39.5 7264 5440none24.612.6126282
3.
 
Canon 1D X Full Frame 17.9 5184 34561080/30p23.811.8278682
4.
 
Canon 1D Mark IV APS-H 16.0 4896 32641080/30p22.812.0132074
5.
 
Leica S Typ 006 Medium Format 37.5 7500 5000none23.912.282476
6.
 
Nikon D3S Full Frame 12.1 4256 2832720/24p23.512.0325382
7.
 
Nikon D300 APS-C 12.2 4288 2848none22.112.067967
8.
 
Olympus E-5 Four Thirds 12.2 4032 3024720/30p21.610.551956
9.
 
Olympus E-600 Four Thirds 12.2 4032 3024none21.510.354155
10.
 
Olympus E-620 Four Thirds 12.2 4032 3024none21.310.353655
11.
 
Olympus E-30 Four Thirds 12.2 4032 3024none21.310.453055
12.
 
Olympus E-420 Four Thirds 10.0 3648 2736none21.510.452756
13.
 
Olympus E-520 Four Thirds 10.0 3648 2736none21.410.454855
14.
 
Olympus E-410 Four Thirds 10.0 3648 2736none21.110.049451
15.
 
Olympus E-510 Four Thirds 10.0 3648 2736none21.210.044252
16.
 
Olympus E-1 Four Thirds 4.9 2560 1920none20.09.7-14544
17.
 
Pentax 645Z Medium Format 51.1 8256 61921080/60i26.014.74505101
Note: DXO values in italics represent estimates based on sensor size and age.
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The E-3 offers Live View, so that it can project the live image that the sensor receives onto the rear screen for framing. The 645D lacks this capability. Both cameras are still-image focused and cannot record videos.
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Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The E-3 and the 645D are similar in the sense that both have an optical viewfinder. The latter is useful for getting a clear image for framing even in brightly lit environments. The viewfinder in the E-3 offers a wider field of view (100%) than the one in the 645D (98%), so that a larger proportion of the captured image is visible in the finder. On the other hand, the viewfinder of the 645D has a higher magnification (0.78x vs 0.58x), 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 Olympus E-3 and Pentax 645D 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.
 
Olympus E-3optical Y2.5 / 230 swivel n 1/8000s 5.0/s Y Y
2.
 
Pentax 645Doptical Y3.0 / 921 fixed n 1/4000s 1.1/s n n
3.
 
Canon 1D Xoptical Y3.2 / 1040 fixed n 1/8000s 14.0/s n n
4.
 
Canon 1D Mark IVoptical Y3.0 / 920 fixed n 1/8000s 10.0/s n n
5.
 
Leica S Typ 006optical Y3.0 / 922 fixed n 1/4000s 1.5/s n n
6.
 
Nikon D3Soptical Y3.0 / 921 fixed n 1/8000s 11.0/s n n
7.
 
Nikon D300optical Y3.0 / 922 fixed n 1/8000s 6.0/s Y n
8.
 
Olympus E-5optical Y3.0 / 920 swivel n 1/8000s 5.0/s Y Y
9.
 
Olympus E-600optical n2.7 / 230 swivel n 1/4000s 4.0/s Y Y
10.
 
Olympus E-620optical n2.7 / 230 swivel n 1/4000s 4.0/s Y Y
11.
 
Olympus E-30optical Y2.7 / 230 swivel n 1/8000s 5.0/s Y Y
12.
 
Olympus E-420optical n2.7 / 215 fixed n 1/4000s 3.5/s Y n
13.
 
Olympus E-520optical n2.7 / 215 fixed n 1/4000s 3.5/s Y Y
14.
 
Olympus E-410optical n2.5 / 215 fixed n 1/4000s 3.0/s Y n
15.
 
Olympus E-510optical n2.5 / 215 fixed n 1/4000s 3.0/s Y Y
16.
 
Olympus E-1optical Y1.8 / 134 fixed n 1/4000s 3.0/s n n
17.
 
Pentax 645Zoptical Y3.2 / 1037 tilting n 1/4000s 3.0/s n n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
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One difference between the cameras concerns the presence of an on-board flash. The E-3 has one, while the 645D does not. While the built-in flash of the E-3 is not very powerful, it can at times be useful as a fill-in light.

The E-3 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the 645D does not have a selfie-screen.

The Pentax 645D 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 E-3 writes its imaging data to Compact Flash or xD Picture cards, while the 645D uses SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails.

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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 Olympus E-3 and Pentax 645D 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.
 
Olympus E-3Y- / ----2.0---
2.
 
Pentax 645DYstereo / ----2.0---
3.
 
Canon 1D XYmono / -Y-mini2.0---
4.
 
Canon 1D Mark IVYstereo / -Y-mini2.0---
5.
 
Leica S Typ 006Y- / ---mini2.0---
6.
 
Nikon D3SYstereo / ---mini2.0---
7.
 
Nikon D300Y- / ---mini2.0---
8.
 
Olympus E-5Ystereo / ---mini2.0---
9.
 
Olympus E-600Y- / ----2.0---
10.
 
Olympus E-620Y- / ----2.0---
11.
 
Olympus E-30Y- / ----2.0---
12.
 
Olympus E-420Y- / ----2.0---
13.
 
Olympus E-520Y- / ----2.0---
14.
 
Olympus E-410Y- / ----2.0---
15.
 
Olympus E-510Y- / ----2.0---
16.
 
Olympus E-1Y- / ----2.0---
17.
 
Pentax 645ZYstereo / monoY-mini3.0---
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Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.

Both the E-3 and the 645D have been discontinued, but can regularly be found used on ebay. The E-3 was replaced by the Olympus E-5, while the 645D was followed by the Pentax 645Z. Further information on the features and operation of the E-3 and 645D can be found, respectively, in the Olympus E-3 Manual (free pdf) or the online Pentax 645D Manual.

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Review summary

So what conclusions can be drawn? Is the Olympus E-3 better than the Pentax 645D or vice versa? The listing below highlights the relative strengths of the two models.

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Advantages of the Olympus E-3:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • More complete view: Has a viewfinder with a larger field of view (100% vs 98%).
  • More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
  • Faster burst: Shoots at higher frequency (5 vs 1.1 flaps/sec) to capture the decisive moment.
  • Less heavy: Is lighter (by 604g or 41 percent) and hence easier to carry around.
  • Sharper images: Has hand-shake reducing image stabilization built-in.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced into a lower priced category (83 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in October 2007).

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Reasons to prefer the Pentax 645D:

  • More detail: Has more megapixels (39.5 vs 10MP), which boosts linear resolution by 99%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Scores substantially higher (26 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (3 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (2.1 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (1.1 stops ISO advantage).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.58x).
  • Larger screen: Has a bigger rear LCD (3.0" vs 2.5") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (921k vs 230k dots).
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • More modern: Reflects 2 years and 4 months of technical progress since the E-3 launch.

If the number of relative strengths (bullet points above) is taken as a guide, the match-up finishes in a tie (11 points each). 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 wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

E-3 11:11 645D

How about other alternatives? Do the specifications of the Olympus E-3 and the Pentax 645D place the cameras among the top in their class? Find out in the latest Best DSLR Camera listing whether the two cameras rank among the cream of the crop.

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the E-3 or the 645D 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 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.

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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.
 
Olympus E-3..88/100..+ +o4/5 Oct 2007 1,699ebay.com
2.
 
Pentax 645D5/5.......... Mar 2010 9,995ebay.com
3.
 
Canon 1D X5/5......4.5/54.5/5 Oct 2011 6,799ebay.com
4.
 
Canon 1D Mark IV5/5....89/100.... Oct 2009 4,999ebay.com
5.
 
Leica S Typ 006............ Sep 2012 21,950ebay.com
6.
 
Nikon D3S5/5....89/1004.5/55/5 Oct 2009 5,199ebay.com
7.
 
Nikon D300..+ +..+ +5/54.5/5 Aug 2007 1,799ebay.com
8.
 
Olympus E-54/5....75/1004/54.5/5 Sep 2010 1,699ebay.com
9.
 
Olympus E-600..........4.5/5 Aug 2009 449ebay.com
10.
 
Olympus E-6203/588/100..72/1004.5/55/5 Feb 2009 699ebay.com
11.
 
Olympus E-30......71/1004.5/54/5 Nov 2008 1,299ebay.com
12.
 
Olympus E-420..85/100..+ +4/54.5/5 Mar 2008 599ebay.com
13.
 
Olympus E-520..87/100..+ +4.5/54.5/5 May 2008 699ebay.com
14.
 
Olympus E-410..86/100..+ +4/54.5/5 Mar 2007 699ebay.com
15.
 
Olympus E-510..89/100..+ +3.5/54.5/5 Mar 2007 799ebay.com
16.
 
Olympus E-1......+o.. Jun 2003 1,699ebay.com
17.
 
Pentax 645Z5/5..3.5/5..4.5/55/5 Apr 2014 8,499ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. 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? If you would like to see a different side-by-side camera review, just use the search menu below. 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: Olympus E-3 vs Pentax 645D

    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 Olympus E-3 Pentax 645D
    Camera Type Digital single lens reflex Digital single lens reflex
    Camera Lens Four Thirds lenses Pentax 645 mount lenses
    Launch Date October 2007 March 2010
    Launch Price USD 1,699 USD 9,995
    Sensor Specs Olympus E-3 Pentax 645D
    Sensor Technology CMOS CCD
    Sensor Format Four Thirds Sensor Medium Format Sensor
    Sensor Size 17.3 x 13.0 mm 44.0 x 33.0 mm
    Sensor Area 224.9 mm2 1452 mm2
    Sensor Diagonal 21.6 mm 55 mm
    Crop Factor 2.0x 0.79x
    Sensor Resolution 10 Megapixels 39.5 Megapixels
    Image Resolution 3648 x 2736 pixels 7264 x 5440 pixels
    Pixel Pitch 4.74 μm 6.06 μm
    Pixel Density 4.44 MP/cm2 2.72 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability no Video no Video
    ISO Setting 100 - 3,200 ISO 100 - 1,600 ISO
    Image Processor TruePic III PRIME II
    DXO Sensor Quality (score) 56 82
    DXO Color Depth (bits) 21.6 24.6
    DXO Dynamic Range (EV) 10.5 12.6
    DXO Low Light (ISO) 571 1262
    Screen Specs Olympus E-3 Pentax 645D
    Viewfinder Type Optical viewfinder Optical viewfinder
    Viewfinder Field of View 100% 98%
    Viewfinder Magnification 0.58x 0.78x
    Top-Level Screen Control Panel Control Panel
    LCD Framing Live View
    Rear LCD Size 2.5inch 3.0inch
    LCD Resolution 230k dots 921k dots
    LCD Attachment Swivel screen Fixed screen
    Shooting Specs Olympus E-3 Pentax 645D
    Focus System Phase-detect AF Phase-detect AF
    Continuous Shooting 5 shutter flaps/s 1.1 shutter flaps/s
    Shutter Life Expectancy150 000 actuations50 000 actuations
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image StabilizationIn-body stabilizationLens stabilization only
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium CF or XD cards SDXC cards
    Single or Dual Card Slots Dual card slots Dual card slots
    Connectivity Specs Olympus E-3 Pentax 645D
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket PC Sync socket
    USB Connector USB 2.0 USB 2.0
    HDMI Port no HDMI no HDMI
    Wifi Support no Wifi no Wifi
    Body Specs Olympus E-3 Pentax 645D
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type Olympus BLM-1 Pentax D-LI90
    Battery Life (CIPA)750 shots per charge800 shots per charge
    Body Dimensions 142 x 116 x 75 mm
    (5.6 x 4.6 x 3.0 in)
    156 x 117 x 119 mm
    (6.1 x 4.6 x 4.7 in)
    Camera Weight 876 g (30.9 oz) 1480 g (52.2 oz)
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