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Olympus E-300 vs Pentax 645D

The Olympus Evolt E-300 and the Pentax 645D are two digital cameras that were officially introduced, respectively, in September 2004 and March 2010. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a Four Thirds (E-300) and a medium format (645D) sensor. The Olympus has a resolution of 8 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-300
versus
Pentax 645D
Olympus E-300   Pentax 645D
Digital single lens reflex Digital single lens reflex
Four Thirds lenses Pentax 645 mount lenses
8 MP – Four Thirds sensor 39.5 MP – Medium Format sensor
no Video no Video
ISO 100-400 (100 - 1,600) ISO 100-1,600
Optical viewfinder Optical viewfinder
1.8" LCD – 134k dots 3.0" LCD – 921k dots
Fixed screen (not touch-sensitive) Fixed screen (not touch-sensitive)
2.5 shutter flaps per second 1.1 shutter flaps per second
not weather sealedWeathersealed body
750 shots per battery charge800 shots per battery charge
147 x 85 x 64 mm, 624 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 Evolt E-300 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

An illustration of the physical size and weight of the Olympus E-300 and the Pentax 645D is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth measures are rounded to the nearest millimeter.

Size Olympus E-300 vs Pentax 645D
Compare E-300 versus 645D top
Comparison E-300 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 considerably larger (46 percent) than the Olympus E-300. Moreover, the 645D is substantially heavier (137 percent) than the E-300. It is noteworthy in this context that the 645D is splash and dust-proof, while the E-300 does not feature any corresponding weather-sealing.

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-300 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 table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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.

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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-300 147 mm 85 mm 64 mm 624 g 750 n Sep 2004 799ebay.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.
 
Canon XT 127 mm 94 mm 64 mm 540 g 400 n Feb 2005 899ebay.com
6.
 
Leica S Typ 006 160 mm 120 mm 80 mm 1260 g .. Y Sep 2012 21,950ebay.com
7.
 
Leica Digilux 3 146 mm 87 mm 77 mm 606 g 750 n Sep 2006 1,499ebay.com
8.
 
Nikon D3S 160 mm 157 mm 88 mm 1240 g 4200 Y Oct 2009 5,199ebay.com
9.
 
Olympus E-620 130 mm 94 mm 60 mm 521 g 500 n Feb 2009 699ebay.com
10.
 
Olympus E-520 136 mm 92 mm 68 mm 535 g 750 n May 2008 699ebay.com
11.
 
Olympus E-410 130 mm 91 mm 53 mm 435 g 500 n Mar 2007 699ebay.com
12.
 
Olympus E-510 136 mm 92 mm 68 mm 538 g 750 n Mar 2007 799ebay.com
13.
 
Olympus E-330 140 mm 87 mm 72 mm 637 g 750 n Jan 2006 999ebay.com
14.
 
Olympus E-400 130 mm 91 mm 53 mm 435 g 500 n Sep 2006 699ebay.com
15.
 
Olympus E-500 130 mm 95 mm 66 mm 479 g 750 n Sep 2005 599ebay.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 naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The E-300 was launched at a markedly lower price (by 92 percent) than the 645D, which puts it into a different market segment. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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. 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-300 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-300 and Pentax 645D sensor measures

With 39.5MP, the 645D offers a higher resolution than the E-300 (8MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 5.30μm for the E-300) due to its larger sensor. Moreover, the 645D is a much more recent model (by 5 years and 5 months) than the E-300, 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-300 are 16.3 x 12.2 inches or 41.5 x 31.1 cm for good quality, 13.1 x 9.8 inches or 33.2 x 24.9 cm for very good quality, and 10.9 x 8.2 inches or 27.6 x 20.7 cm for excellent quality prints.

The Olympus Evolt E-300 has a native sensitivity range from ISO 100 to ISO 400, which can be extended to ISO 100-1600. The corresponding ISO settings for the Pentax 645D are ISO 100 to ISO 1600 (no boost).

Technology-wise, both cameras are equipped with CCD (Charged Coupled Device) 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.

E-300 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. 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-300 Four Thirds 8.0 3264 2448none20.410.1-4048
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.
 
Canon XT APS-C 8.0 3456 2304none21.810.863760
6.
 
Leica S Typ 006 Medium Format 37.5 7500 5000none23.912.282476
7.
 
Leica Digilux 3 Four Thirds 7.4 3136 2352none21.010.612753
8.
 
Nikon D3S Full Frame 12.1 4256 2832720/24p23.512.0325382
9.
 
Olympus E-620 Four Thirds 12.2 4032 3024none21.310.353655
10.
 
Olympus E-520 Four Thirds 10.0 3648 2736none21.410.454855
11.
 
Olympus E-410 Four Thirds 10.0 3648 2736none21.110.049451
12.
 
Olympus E-510 Four Thirds 10.0 3648 2736none21.210.044252
13.
 
Olympus E-330 Four Thirds 7.4 3136 2352none20.810.47352
14.
 
Olympus E-400 Four Thirds 10.0 3648 2736none21.010.612753
15.
 
Olympus E-500 Four Thirds 8.0 3264 2448none20.710.34551
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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Neither the E-300 nor the 645D offer Live View, so that they cannot project the live image that the sensor receives onto the rear screen. Moreover, 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-300 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 645D offers a wider field of view (98%) than the one in the E-300 (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the 645D has a higher magnification (0.78x vs 0.5x), 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-300 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-300optical n1.8 / 134 fixed n 1/4000s 2.5/s Y n
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.
 
Canon XToptical n1.8 / 115 fixed n 1/4000s 3.0/s Y n
6.
 
Leica S Typ 006optical Y3.0 / 922 fixed n 1/4000s 1.5/s n n
7.
 
Leica Digilux 3optical n2.5 / 207 fixed n 1/4000s 3.0/s Y n
8.
 
Nikon D3Soptical Y3.0 / 921 fixed n 1/8000s 11.0/s n n
9.
 
Olympus E-620optical n2.7 / 230 swivel n 1/4000s 4.0/s Y Y
10.
 
Olympus E-520optical n2.7 / 215 fixed n 1/4000s 3.5/s Y Y
11.
 
Olympus E-410optical n2.5 / 215 fixed n 1/4000s 3.0/s Y n
12.
 
Olympus E-510optical n2.5 / 215 fixed n 1/4000s 3.0/s Y Y
13.
 
Olympus E-330optical n2.5 / 215 tilting n 1/4000s 3.0/s Y n
14.
 
Olympus E-400optical n2.5 / 215 fixed n 1/4000s 3.0/s Y n
15.
 
Olympus E-500optical n2.5 / 215 fixed n 1/4000s 2.5/s Y n
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-300 has one, while the 645D does not. While the built-in flash of the E-300 is not very powerful, it can at times be useful as a fill-in light.

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-300 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 Evolt E-300 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-300Y- / ----2.0---
2.
 
Pentax 645DYstereo / ----2.0---
3.
 
Canon 1D XYmono / -Y-mini2.0---
4.
 
Canon 1D Mark IVYstereo / -Y-mini2.0---
5.
 
Canon XTY- / ----2.0---
6.
 
Leica S Typ 006Y- / ---mini2.0---
7.
 
Leica Digilux 3Ystereo / mono---2.0---
8.
 
Nikon D3SYstereo / ---mini2.0---
9.
 
Olympus E-620Y- / ----2.0---
10.
 
Olympus E-520Y- / ----2.0---
11.
 
Olympus E-410Y- / ----2.0---
12.
 
Olympus E-510Y- / ----2.0---
13.
 
Olympus E-330Y- / ----2.0---
14.
 
Olympus E-400Y- / ----2.0---
15.
 
Olympus E-500Y- / ----2.0---
16.
 
Olympus E-1Y- / ----2.0---
17.
 
Pentax 645ZYstereo / monoY-mini3.0---
padding

Studio photographers will appreciate that the Pentax 645D (unlike the E-300) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the E-300 and the 645D have been discontinued, but can regularly be found used on ebay. The E-300 was replaced by the Olympus E-330, while the 645D was followed by the Pentax 645Z. Further information on the features and operation of the E-300 and 645D can be found, respectively, in the Olympus E-300 Manual (free pdf) or the online Pentax 645D Manual.

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Review summary

So what is the bottom line? Which of the two cameras – the Olympus E-300 or the Pentax 645D – has the upper hand? Is one clearly better than the other? A synthesis of the relative strong points of each of the models is listed below.

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Reasons to prefer the Olympus Evolt E-300:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Faster burst: Shoots at higher frequency (2.5 vs 1.1 flaps/sec) to capture the decisive moment.
  • More compact: Is smaller (147x85mm vs 156x117mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 856g or 58 percent) and hence easier to carry around.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced into a lower priced category (92 percent cheaper at launch).
  • More heavily discounted: Has been available for much longer (launched in September 2004).

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Advantages of the Pentax 645D:

  • More detail: Has more megapixels (39.5 vs 8MP), which boosts linear resolution by 122%.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Better image quality: Is equipped with a larger and more technologically advanced sensor.
  • Richer colors: The sensor size advantage translates into images with better, more accurate colors.
  • More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
  • Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
  • More complete view: Has a viewfinder with a larger field of view (98% vs 95%).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.5x).
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • Larger screen: Has a bigger rear LCD (3.0" vs 1.8") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (921k vs 134k dots).
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • More modern: Reflects 5 years and 5 months of technical progress since the E-300 launch.

If the count of relative strengths (bullet points above) is taken as a measure, the 645D is the clear winner of the contest (15 : 7 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding 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-300 07:15 645D

How about other alternatives? Do the specifications of the Olympus E-300 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 the spec-sheets of cameras can offer a general idea of their imaging potential, it says little about, for example, the shooting experience and imaging performance of the E-300 and the 645D in practical situations. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.

Expert reviews

This is why expert reviews are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear 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-300......+o4.5/5 Sep 2004 799ebay.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.
 
Canon XT..80/100..+ +o.. Feb 2005 899ebay.com
6.
 
Leica S Typ 006............ Sep 2012 21,950ebay.com
7.
 
Leica Digilux 3............ Sep 2006 1,499ebay.com
8.
 
Nikon D3S5/5....89/1004.5/55/5 Oct 2009 5,199ebay.com
9.
 
Olympus E-6203/588/100..72/1004.5/55/5 Feb 2009 699ebay.com
10.
 
Olympus E-520..87/100..+ +4.5/54.5/5 May 2008 699ebay.com
11.
 
Olympus E-410..86/100..+ +4/54.5/5 Mar 2007 699ebay.com
12.
 
Olympus E-510..89/100..+ +3.5/54.5/5 Mar 2007 799ebay.com
13.
 
Olympus E-330......+o.. Jan 2006 999ebay.com
14.
 
Olympus E-400..85/100....4/54/5 Sep 2006 699ebay.com
15.
 
Olympus E-500..76/100..+ +.... Sep 2005 599ebay.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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Care should be taken when interpreting the review scores above, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. 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. Also, please note that some of the review sites have changed their methodology and reporting over time.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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    Specifications: Olympus E-300 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-300 Pentax 645D
    Camera Type Digital single lens reflex Digital single lens reflex
    Camera Lens Four Thirds lenses Pentax 645 mount lenses
    Launch Date September 2004 March 2010
    Launch Price USD 799 USD 9,995
    Sensor Specs Olympus E-300 Pentax 645D
    Sensor Technology CCD 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 8 Megapixels 39.5 Megapixels
    Image Resolution 3264 x 2448 pixels 7264 x 5440 pixels
    Pixel Pitch 5.30 μm 6.06 μm
    Pixel Density 3.55 MP/cm2 2.72 MP/cm2
    Moiré control Anti-Alias filter no AA filter
    Movie Capability no Video no Video
    ISO Setting 100 - 400 ISO 100 - 1,600 ISO
    ISO Boost 100 - 1,600 ISO no Enhancement
    Image Processor TruePic PRIME II
    DXO Sensor Quality (score) .. 82
    DXO Color Depth (bits) .. 24.6
    DXO Dynamic Range (EV) .. 12.6
    DXO Low Light (ISO) .. 1262
    Screen Specs Olympus E-300 Pentax 645D
    Viewfinder Type Optical viewfinder Optical viewfinder
    Viewfinder Field of View 95% 98%
    Viewfinder Magnification 0.5x 0.78x
    Top-Level Screen no Top Display Control Panel
    Rear LCD Size 1.8inch 3.0inch
    LCD Resolution 134k dots 921k dots
    LCD Attachment Fixed screen Fixed screen
    Shooting Specs Olympus E-300 Pentax 645D
    Focus System Phase-detect AF Phase-detect AF
    Continuous Shooting 2.5 shutter flaps/s 1.1 shutter flaps/s
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    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-300 Pentax 645D
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync 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-300 Pentax 645D
    Environmental Sealingnot weather sealedWeathersealed body
    Battery Type Olympus BLM-1 Pentax D-LI90
    Battery Life (CIPA)750 shots per charge800 shots per charge
    Body Dimensions 147 x 85 x 64 mm
    (5.8 x 3.3 x 2.5 in)
    156 x 117 x 119 mm
    (6.1 x 4.6 x 4.7 in)
    Camera Weight 624 g (22.0 oz) 1480 g (52.2 oz)
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