Panasonic LX100 vs Pentax 645D
The Panasonic Lumix DMC-LX100 and the Pentax 645D are two digital cameras that were officially introduced, respectively, in September 2014 and March 2010. The LX100 is a fixed lens compact, while the 645D is a DSLR. The cameras are based on a Four Thirds (LX100) and a medium format (645D) sensor. The Panasonic has a resolution of 12.7 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.
Going beyond this snapshot of core features and characteristics, what are the differences between the Panasonic Lumix DMC-LX100 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.
An illustration of the physical size and weight of the Panasonic LX100 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 size dimensions are rounded to the nearest millimeter.
The LX100 can be obtained in two different colors (black, silver), while the 645D is only available in black.
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 (140 percent) than the Panasonic LX100. It is noteworthy in this context that the 645D is splash and dust-proof, while the LX100 does not feature any corresponding weather-sealing.
The above size and weight comparisons are to some extent incomplete and possibly misleading, as the LX100 has a lens built in, whereas the 645D is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup.
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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.
|Panasonic LX100||4.5 in||2.6 in||2.2 in||13.9 oz||300||n||Sep 2014||899|
|Pentax 645D||6.1 in||4.6 in||4.7 in||52.2 oz||800||Y||Mar 2010||9,995|
|Canon G1 X Mark II||4.6 in||2.9 in||2.6 in||19.5 oz||240||n||Feb 2014||799|
|Canon 1D X||6.2 in||6.6 in||3.3 in||54.7 oz||1120||Y||Oct 2011||6,799|
|Canon 1D Mark IV||6.1 in||6.2 in||3.1 in||43.4 oz||1500||Y||Oct 2009||4,999|
|Leica D-LUX Typ 109||4.6 in||2.6 in||2.2 in||14.3 oz||300||n||Sep 2014||1,195|
|Leica S Typ 006||6.3 in||4.7 in||3.1 in||44.4 oz||..||Y||Sep 2012||21,950|
|Nikon D3S||6.3 in||6.2 in||3.5 in||43.7 oz||4200||Y||Oct 2009||5,199|
|Panasonic LX100 II||4.5 in||2.6 in||2.6 in||13.8 oz||300||n||Aug 2018||999|
|Panasonic FZ1000||5.4 in||3.9 in||5.2 in||29.3 oz||360||n||Jun 2014||899|
|Panasonic GM5||3.9 in||2.4 in||1.4 in||7.4 oz||220||n||Sep 2014||749|
|Panasonic G6||4.8 in||3.3 in||2.8 in||13.8 oz||340||n||Apr 2013||599|
|Panasonic GM1||3.9 in||2.2 in||1.2 in||7.2 oz||230||n||Oct 2013||749|
|Panasonic GX7||4.8 in||2.8 in||2.2 in||14.2 oz||350||n||Aug 2013||999|
|Panasonic GF1||4.7 in||2.8 in||1.4 in||13.6 oz||380||n||Sep 2009||749|
|Panasonic GH1||4.9 in||3.5 in||1.8 in||13.6 oz||300||n||Mar 2009||899|
|Pentax 645Z||6.1 in||4.6 in||4.8 in||54.7 oz||650||Y||Apr 2014||8,499|
|Notes: 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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The LX100 was launched at a lower price than the 645D, despite having a lens built in. 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.
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. 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 Panasonic LX100 features a Four Thirds sensor and the Pentax 645D a medium format sensor. The sensor area in the 645D is 685 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.2 and 0.79. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3. The LX100 has the particularity of featuring a switch that allows to toggle between multiple aspect ratios, while maintaining the same field of view and full image resolution.
With 39.5MP, the 645D offers a higher resolution than the LX100 (12.7MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 3.82μm for the LX100) due to its larger sensor. However, the LX100 is a much more recent model (by 4 years and 6 months) than the 645D, and its sensor will have benefitted from technological advances during this time that 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 Panasonic LX100 are 20.6 x 15.4 inches or 52.2 x 39.2 cm for good quality, 16.4 x 12.4 inches or 41.8 x 31.4 cm for very good quality, and 13.7 x 10.3 inches or 34.8 x 26.1 cm for excellent quality prints.
The Panasonic Lumix DMC-LX100 has a native sensitivity range from ISO 200 to ISO 25600, which can be extended to ISO 100-25600. The corresponding ISO settings for the Pentax 645D are ISO 100 to ISO 1600 (no boost).
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 consideration, the 645D offers substantially better image quality than the LX100 (overall score 15 points higher). The advantage is based on 2.3 bits higher color depth, 0.1 EV in additional dynamic range, and 1.2 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
| DXO |
|Panasonic LX100||Four Thirds||12.7||4112||3088||4K/30p||22.3||12.5||553||67|
|Pentax 645D||Medium Format||39.5||7264||5440||none||24.6||12.6||1262||82|
|Canon G1 X Mark II||1.5-inch||13.0||4160||3120||1080/30p||21.5||10.8||581||58|
|Canon 1D X||Full Frame||17.9||5184||3456||1080/30p||23.8||11.8||2786||82|
|Canon 1D Mark IV||APS-H||16.0||4896||3264||1080/30p||22.8||12.0||1320||74|
|Leica D-LUX Typ 109||Four Thirds||12.7||4112||3088||4K/30p||..||..||..||..|
|Leica S Typ 006||Medium Format||37.5||7500||5000||none||23.9||12.2||824||76|
|Nikon D3S||Full Frame||12.1||4256||2832||720/24p||23.5||12.0||3253||82|
|Panasonic LX100 II||Four Thirds||16.8||4736||3552||4K/30p||..||..||..||..|
|Panasonic GM5||Four Thirds||15.8||4592||3448||1080/60p||22.1||11.7||721||66|
|Panasonic G6||Four Thirds||15.9||4608||3456||1080/60p||21.3||11.5||639||61|
|Panasonic GM1||Four Thirds||15.8||4592||3448||1080/60i||22.3||11.7||660||66|
|Panasonic GX7||Four Thirds||15.8||4592||3448||1080/60p||22.6||12.2||718||70|
|Panasonic GF1||Four Thirds||12.0||4000||3000||720/30p||21.2||10.3||513||54|
|Panasonic GH1||Four Thirds||12.0||4000||3000||1080/24p||21.6||11.6||772||64|
|Pentax 645Z||Medium Format||51.1||8256||6192||1080/60i||26.0||14.7||4505||101|
Many modern cameras cannot only take still pictures, but also record videos. The LX100 indeed provides movie recording capabilities, while the 645D does not. The highest resolution format that the LX100 can use is 4K/30p.
Apart from body and sensor, cameras can and do differ across a range of features. For example, the LX100 has an electronic viewfinder (2764k dots), while the 645D 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 LX100 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 0.70x), 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 Panasonic LX100 and Pentax 645D in connection with corresponding information for a sample of similar cameras.
|Canon G1 X Mark II||optional||n||3.0||1040||tilting||Y||1/4000s||5.2||Y||Y|
|Canon 1D X||optical||Y||3.2||1040||fixed||n||1/8000s||14.0||n||n|
|Canon 1D Mark IV||optical||Y||3.0||920||fixed||n||1/8000s||10.0||n||n|
|Leica D-LUX Typ 109||2764||n||3.0||921||fixed||n||1/4000s||11.0||n||Y|
|Leica S Typ 006||optical||Y||3.0||922||fixed||n||1/4000s||1.5||n||n|
|Panasonic LX100 II||2764||n||3.0||1240||fixed||Y||1/4000s||11.0||n||Y|
One feature that is present on the 645D, but is missing on the LX100 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 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 LX100 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 LX100 and the Pentax 645D both have 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.
Concerning the storage of imaging data, both the LX100 and the 645D write their files to SDXC cards. The 645D features dual card slots, which can be very useful in case a memory card fails. In contrast, the LX100 only has one slot. The LX100 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the 645D cannot take advantage of Ultra High Speed SD cards.
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 Panasonic Lumix DMC-LX100 and Pentax 645D and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
|Canon G1 X Mark II||Y||stereo||mono||-||-||mini||2.0||Y||Y||-|
|Canon 1D X||Y||mono||-||Y||-||mini||2.0||-||-||-|
|Canon 1D Mark IV||Y||stereo||-||Y||-||mini||2.0||-||-||-|
|Leica D-LUX Typ 109||Y||stereo||mono||-||-||micro||2.0||Y||Y||-|
|Leica S Typ 006||Y||-||-||-||-||mini||2.0||-||-||-|
|Panasonic LX100 II||Y||stereo||mono||-||-||micro||2.0||Y||-||Y|
It is notable that the LX100 offers wifi support, while the 645D does not. Wifi can be a very convenient means to transfer image data to an off-camera location.
Studio photographers will appreciate that the Pentax 645D (unlike the LX100) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
The LX100 is a recent model that features in the current product line-up of Panasonic. In contrast, the 645D has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the 645D was succeeded by the Pentax 645Z. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Panasonic and Pentax websites.
So what conclusions can be drawn? Which of the two cameras – the Panasonic LX100 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.
Reasons to prefer the Panasonic Lumix DMC-LX100:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Flexible image proportions: Has a multi-aspect sensor that allows for alternative image shapes.
- Broader imaging potential: Can record not only still images but also 4K/30p movies.
- 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 98%).
- Faster burst: Shoots at higher frequency (11 vs 1.1 flaps/sec) to capture the decisive moment.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- Ready to shoot: Comes with a built-in lens, while the 645D requires a separate lens.
- More compact: Is smaller (115x66mm vs 156x117mm) and thus needs less room in the bag.
- Less heavy: Is lighter even though it comes with a built-in lens (unlike the 645D).
- Sharper images: Has hand-shake reducing image stabilization built-in.
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
- More affordable: Was introduced at a lower price, despite coming with a built-in lens.
- More modern: Reflects 4 years and 6 months of technical progress since the 645D launch.
Advantages of the Pentax 645D:
- More detail: Has more megapixels (39.5 vs 12.7MP), which boosts linear resolution by 76%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better image quality: Scores substantially higher (15 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (2.3 bits more color depth).
- Better low-light sensitivity: Can shoot in dim conditions (1.2 stops ISO advantage).
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.78x vs 0.70x).
- Easier setting verification: Features a control panel on top to check shooting parameters.
- More flexible: Makes it possible to change lenses and thus to use specialty optics.
- Longer lasting: Gets more shots (800 versus 300) out of a single battery charge.
- 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.
- Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
- More heavily discounted: Has been around for much longer (launched in March 2010).
If the count of relative strengths (bullet points above) is taken as a measure, the LX100 emerges as the winner of the contest (16 : 14 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. 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.
How about other alternatives? Do the specifications of the Panasonic LX100 and the Pentax 645D place the cameras among the top in their class? Find out in the latest Best Travel-Zoom Camera and Best DSLR Camera listings 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 partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the LX100 or the 645D. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.
This is where reviews by experts come in. The table below provides a synthesis of the camera assessments of some of the best known photo-gear review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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.
|Panasonic LX100||+ +||85/100||5/5||4/5||5/5||Sep 2014||899|
|Pentax 645D||..||..||..||4.5/5||..||Mar 2010||9,995|
|Canon G1 X Mark II||+||77/100||4/5||4/5||4.5/5||Feb 2014||799|
|Canon 1D X||..||..||4.5/5||4.5/5||4.5/5||Oct 2011||6,799|
|Canon 1D Mark IV||..||89/100||..||5/5||..||Oct 2009||4,999|
|Leica D-LUX Typ 109||..||..||4.5/5||..||4.5/5||Sep 2014||1,195|
|Leica S Typ 006||..||..||..||..||..||Sep 2012||21,950|
|Nikon D3S||..||89/100||4.5/5||5/5||5/5||Oct 2009||5,199|
|Panasonic LX100 II||+||82/100||4.5/5||4.5/5||4.5/5||Aug 2018||999|
|Panasonic FZ1000||+ +||82/100||4.5/5||4.5/5||4.5/5||Jun 2014||899|
|Panasonic GM5||+||77/100||5/5||5/5||4.5/5||Sep 2014||749|
|Panasonic G6||+ +||..||5/5||..||4.5/5||Apr 2013||599|
|Panasonic GM1||+||78/100||5/5||4.5/5||4.5/5||Oct 2013||749|
|Panasonic GX7||+||79/100||5/5||4.5/5||5/5||Aug 2013||999|
|Panasonic GF1||85/100||69/100||4.5/5||4.5/5||4.5/5||Sep 2009||749|
|Panasonic GH1||+ +||72/100||4.5/5||5/5||4.5/5||Mar 2009||899|
|Pentax 645Z||..||..||4.5/5||5/5||5/5||Apr 2014||8,499|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The above review scores should be interpreted with care, 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 comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
Other camera comparisons
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Specifications: Panasonic LX100 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 Model||Panasonic LX100||Pentax 645D|
|Camera Type||Fixed lens compact camera||Digital single lens reflex|
|Camera Lens||24-75mm f/1.7-2.8||Pentax 645 mount lenses|
|Launch Date||September 2014||March 2010|
|Launch Price||USD 899||USD 9,995|
|Sensor Specs||Panasonic LX100||Pentax 645D|
|Sensor Format||Four Thirds Sensor||Medium Format Sensor|
|Sensor Size||15.7 x 11.8 mm||44.0 x 33.0 mm|
|Sensor Area||185.26 mm2||1452 mm2|
|Sensor Diagonal||19.6 mm||55 mm|
|Sensor Resolution||12.7 Megapixels||39.5 Megapixels|
|Image Resolution||4112 x 3088 pixels||7264 x 5440 pixels|
|Pixel Pitch||3.82 μm||6.06 μm|
|Pixel Density||6.85 MP/cm2||2.72 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||4K/30p Video||no Video|
|ISO Setting||200 - 25,600 ISO||100 - 1,600 ISO|
|ISO Boost||100 - 25,600 ISO||no Enhancement|
|Image Processor||Venus||PRIME II|
|DXO Sensor Quality (score)||67||82|
|DXO Color Depth (bits)||22.3||24.6|
|DXO Dynamic Range (EV)||12.5||12.6|
|DXO Low Light (ISO)||553||1262|
|Screen Specs||Panasonic LX100||Pentax 645D|
|Viewfinder Type||Electronic viewfinder||Optical viewfinder|
|Viewfinder Field of View||100%||98%|
|Viewfinder Resolution||2764k dots|
|Top-Level Screen||no Top Display||Control Panel|
|LCD Framing||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||921k dots||921k dots|
|LCD Attachment||Fixed screen||Fixed screen|
|Shooting Specs||Panasonic LX100||Pentax 645D|
|Focus System||Contrast-detect AF||Phase-detect AF|
|Manual Focusing Aid||Focus Peaking||no Peaking Feature|
|Continuous Shooting||11 shutter flaps/s||1.1 shutter flaps/s|
|Electronic Shutter||up to 1/16000s||no E-Shutter|
|Time-Lapse Photography||Intervalometer built-in||Intervalometer built-in|
|Fill Flash||no On-Board Flash||no On-Board Flash|
|Storage Medium||SDXC cards||SDXC cards|
|Second Storage Option||Single card slot||Dual card slots|
|UHS card support||UHS-I||no|
|Connectivity Specs||Panasonic LX100||Pentax 645D|
|Studio Flash||no PC Sync||PC Sync socket|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||micro HDMI||no HDMI|
|Wifi Support||Wifi built-in||no Wifi|
|Near-Field Communication||NFC built-in||no NFC|
|Body Specs||Panasonic LX100||Pentax 645D|
|Environmental Sealing||not weather sealed||Weathersealed body|
|Battery Life (CIPA)||300 shots per charge||800 shots per charge|
115 x 66 x 55 mm
(4.5 x 2.6 x 2.2 in)
156 x 117 x 119 mm
(6.1 x 4.6 x 4.7 in)
|Camera Weight||393 g (13.9 oz)||1480 g (52.2 oz)|
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