Pentax K-S2 vs Zeiss ZX1
The Pentax K-S2 and the Zeiss ZX1 are two digital cameras that were announced, respectively, in February 2015 and September 2018. The K-S2 is a DSLR, while the ZX1 is a fixed lens compact. The cameras are based on an APS-C (K-S2) and a full frame (ZX1) sensor. The Pentax has a resolution of 20 megapixels, whereas the Zeiss provides 37.4 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 Pentax K-S2 and the Zeiss ZX1? 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.
The side-by-side display below illustrates the physical size and weight of the Pentax K-S2 and the Zeiss ZX1. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter.
The K-S2 can be obtained in six different colors (black, grey, pink, orange, green, white), while the ZX1 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 Zeiss ZX1 is notably larger (18 percent) than the Pentax K-S2. It is worth mentioning in this context that the K-S2 is splash and dust resistant, while the ZX1 does not feature any corresponding weather-sealing.
The above size and weight comparisons are to some extent incomplete and possibly misleading, as the ZX1 has a lens built in, whereas the K-S2 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup.
The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. 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.
|1.||Pentax K-S2||123 mm||91 mm||73 mm||678 g||410||Y||Feb 2015||749|
|2.||Zeiss ZX1||142 mm||93 mm||46 mm||800 g||250||n||Sep 2018||5,999|
|3.||Leica Q2||130 mm||80 mm||92 mm||718 g||370||Y||Mar 2019||4,995|
|4.||Leica M10||139 mm||80 mm||39 mm||660 g||210||Y||Jan 2017||6,595|
|5.||Leica Q Typ 116||130 mm||80 mm||93 mm||640 g||300||n||Jun 2015||4,249|
|6.||Panasonic FZ1000||137 mm||99 mm||131 mm||831 g||360||n||Jun 2014||899|
|7.||Pentax KP||132 mm||101 mm||76 mm||703 g||390||Y||Jan 2017||1,099|
|8.||Pentax K-70||126 mm||93 mm||74 mm||688 g||410||Y||Jun 2016||649|
|9.||Pentax K-3 II||131 mm||100 mm||77 mm||800 g||720||Y||Apr 2015||1,099|
|10.||Pentax K-S1||121 mm||93 mm||70 mm||558 g||410||n||Aug 2014||749|
|11.||Pentax K-50||130 mm||97 mm||71 mm||650 g||410||Y||Jun 2013||599|
|12.||Pentax K-3||131 mm||100 mm||77 mm||800 g||560||Y||Oct 2013||1,299|
|13.||Pentax K-30||130 mm||97 mm||71 mm||650 g||410||Y||May 2012||849|
|14.||Pentax K-5||131 mm||97 mm||73 mm||760 g||740||Y||Sep 2010||1,099|
|15.||Sony RX1R II||113 mm||65 mm||72 mm||507 g||220||n||Oct 2015||3,299|
|16.||Sony A68||143 mm||104 mm||81 mm||610 g||540||n||Nov 2015||699|
|17.||Sony A77 II||143 mm||104 mm||81 mm||647 g||480||Y||May 2014||1,199|
|Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
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. 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.
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. 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Pentax K-S2 features an APS-C sensor and the Zeiss ZX1 a full frame sensor. The sensor area in the ZX1 is 135 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
With 37.4MP, the ZX1 offers a higher resolution than the K-S2 (20MP), but the ZX1 nevertheless has larger individual pixels (pixel pitch of 4.81μm versus 4.28μm for the K-S2) due to its larger sensor. Moreover, the ZX1 is a much more recent model (by 3 years and 7 months) than the K-S2, 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 K-S2 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Zeiss ZX1 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the ZX1 for good quality output (200 dots per inch) amounts to 37.4 x 25 inches or 95.1 x 63.4 cm, for very good quality (250 dpi) 30 x 20 inches or 76.1 x 50.7 cm, and for excellent quality (300 dpi) 25 x 16.6 inches or 63.4 x 42.3 cm. The corresponding values for the Pentax K-S2 are 27.4 x 18.2 inches or 69.5 x 46.3 cm for good quality, 21.9 x 14.6 inches or 55.6 x 37.1 cm for very good quality, and 18.2 x 12.2 inches or 46.3 x 30.9 cm for excellent quality prints.
The Pentax K-S2 has a native sensitivity range from ISO 100 to ISO 51200. The corresponding ISO settings for the Zeiss ZX1 are ISO 80 to ISO 51200 (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"). The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
| DXO |
|2.||Zeiss ZX1||Full Frame||37.4||7488||4992||4K/30p||..||..||..||..|
|3.||Leica Q2||Full Frame||46.7||8368||5584||4K/30p||26.4||13.5||2491||96|
|4.||Leica M10||Full Frame||23.8||5952||3992||none||24.4||13.2||2133||86|
|5.||Leica Q Typ 116||Full Frame||24.0||6000||4000||1080/60p||24.3||12.7||2221||85|
|9.||Pentax K-3 II||APS-C||24.1||6016||4000||1080/60i||23.6||13.6||1106||80|
|15.||Sony RX1R II||Full Frame||42.2||7952||5304||1080/60p||25.8||13.9||3204||97|
|17.||Sony A77 II||APS-C||24.0||6000||4000||1080/60p||..||..||..||..|
Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the ZX1 provides a better video resolution than the K-S2. It can shoot movie footage at 4K/30p, while the Pentax is limited to 1080/30p.
Apart from body and sensor, cameras can and do differ across a range of features. For example, the ZX1 has an electronic viewfinder (6221k dots), while the K-S2 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 viewfinders of both cameras offer the same field of view (100%), but the viewfinder of the ZX1 has a higher magnification than the one of the K-S2 (0.74x vs 0.63x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Pentax K-S2 and Zeiss ZX1 along with similar information for a selection of comparators.
|5.||Leica Q Typ 116||3680||n||3.0||1040||fixed||Y||1/2000s||10.0||n||Y|
|9.||Pentax K-3 II||optical||Y||3.2||1037||fixed||n||1/8000s||8.3||n||Y|
|15.||Sony RX1R II||2360||n||3.0||1229||tilting||n||1/4000s||5.0||n||n|
|17.||Sony A77 II||2359||Y||3.0||1229||full-flex||n||1/8000s||12.0||Y||Y|
One difference between the cameras concerns the presence of an on-board flash. The K-S2 has one, while the ZX1 does not. While the built-in flash of the K-S2 is not very powerful, it can at times be useful as a fill-in light.The K-S2 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 ZX1 does not have a selfie-screen.
The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the ZX1 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 Pentax K-S2 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 K-S2 writes its imaging data to SDXC cards, while the ZX1 uses an internal SSD.
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 Pentax K-S2 and Zeiss ZX1 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
|5.||Leica Q Typ 116||Y||stereo||mono||-||-||micro||2.0||Y||Y||-|
|9.||Pentax K-3 II||Y||mono||mono||Y||Y||mini||3.0||-||-||-|
|15.||Sony RX1R II||Y||stereo||mono||Y||-||micro||2.0||Y||Y||-|
|17.||Sony A77 II||Y||stereo||mono||Y||-||mini||2.0||Y||Y||-|
It is notable that the K-S2 has a microphone port, which is missing on the ZX1. Such an external microphone input can help to substantially improve the quality of audio recordings when a good external microphone is used.
Both the K-S2 and the ZX1 are recent models that are part of the current product line-up. The K-S2 replaced the earlier Pentax K-S1, while the ZX1 does not have a direct predecessor. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Pentax and Zeiss websites.
So what is the bottom line? Is the Pentax K-S2 better than the Zeiss ZX1 or vice versa? A synthesis of the relative strong points of each of the models is listed below.
Advantages of the Pentax K-S2:
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better sound: Can connect to an external microphone for higher quality sound recording.
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- 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 (1/6000s vs 1/1000s) to freeze action.
- Faster burst: Shoots at higher frequency (5.4 vs 3 flaps/sec) to capture the decisive moment.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- More flexible: Can take a variety of interchangeable lenses, including specialty optics.
- More compact: Is smaller (123x91mm vs 142x93mm) and thus needs less room in the bag.
- Longer lasting: Can take more shots (410 versus 250) on a single battery charge.
- Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
- 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.
Arguments in favor of the Zeiss ZX1:
- More detail: Has more megapixels (37.4 vs 20MP), which boosts linear resolution by 37%.
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- 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.
- Better video: Provides higher definition movie capture (4K/30p vs 1080/30p).
- More framing info: Has an electronic viewfinder that displays shooting data.
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.74x vs 0.63x).
- Larger screen: Has a bigger rear LCD (4.3" vs 3.0") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (2765k vs 921k dots).
- Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- Ready to shoot: Comes with an integrated lens, while the K-S2 requires a separate lens.
- Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- More prestigious: Has the Zeiss luxury appeal, which ensures a high resale value.
If the count of individual advantages (bullet points above) is taken as a guide, the ZX1 emerges as the winner of the match-up (17 : 14 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.
How about other alternatives? Do the specifications of the Pentax K-S2 and the Zeiss ZX1 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Prime Lens Compact 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 K-S2 or the ZX1. 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.
This is why hands-on reviews by experts are important. The adjacent summary-table relays the overall verdicts of several of the most popular camera review sites (amateurphotographer [AP], cameralabs [CL], 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.
|1.||Pentax K-S2||4.5/5||..||..||5/5||4.5/5||Feb 2015||749|
|2.||Zeiss ZX1||..||..||..||..||..||Sep 2018||5,999|
|3.||Leica Q2||..||..||84/100||4.5/5||4/5||Mar 2019||4,995|
|4.||Leica M10||4.5/5||..||..||4/5||4.5/5||Jan 2017||6,595|
|5.||Leica Q Typ 116||5/5||..||80/100||4.5/5||4.5/5||Jun 2015||4,249|
|6.||Panasonic FZ1000||4/5||+ +||82/100||4.5/5||4.5/5||Jun 2014||899|
|7.||Pentax KP||4/5||..||82/100||5/5||4.5/5||Jan 2017||1,099|
|8.||Pentax K-70||4.5/5||..||79/100||4.5/5||4.5/5||Jun 2016||649|
|9.||Pentax K-3 II||4.5/5||..||..||5/5||5/5||Apr 2015||1,099|
|10.||Pentax K-S1||4/5||..||..||4.5/5||4/5||Aug 2014||749|
|11.||Pentax K-50||5/5||..||..||5/5||4.5/5||Jun 2013||599|
|12.||Pentax K-3||4/5||..||83/100||5/5||5/5||Oct 2013||1,299|
|13.||Pentax K-30||4/5||..||78/100||4.5/5||4.5/5||May 2012||849|
|14.||Pentax K-5||4/5||..||83/100||5/5||4.5/5||Sep 2010||1,099|
|15.||Sony RX1R II||5/5||..||82/100||..||4.5/5||Oct 2015||3,299|
|16.||Sony A68||3/5||..||..||4/5||4/5||Nov 2015||699|
|17.||Sony A77 II||4/5||..||80/100||4.5/5||5/5||May 2014||1,199|
|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. 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. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
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 use the search menu below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.
Specifications: Pentax K-S2 vs Zeiss ZX1
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||Pentax K-S2||Zeiss ZX1|
|Camera Type||Digital single lens reflex||Fixed lens compact camera|
|Camera Lens||Pentax K mount lenses||35mm f/2.8|
|Launch Date||February 2015||September 2018|
|Launch Price||USD 749||USD 5,999|
|Sensor Specs||Pentax K-S2||Zeiss ZX1|
|Sensor Format||APS-C Sensor||Full Frame Sensor|
|Sensor Size||23.5 x 15.6 mm||36.0 x 24.0 mm|
|Sensor Area||366.6 mm2||864 mm2|
|Sensor Diagonal||28.2 mm||43.3 mm|
|Sensor Resolution||20 Megapixels||37.4 Megapixels|
|Image Resolution||5472 x 3648 pixels||7488 x 4992 pixels|
|Pixel Pitch||4.28 μm||4.81 μm|
|Pixel Density||5.45 MP/cm2||4.33 MP/cm2|
|Moiré control||no AA filter||Anti-Alias filter|
|Movie Capability||1080/30p Video||4K/30p Video|
|ISO Setting||100 - 51,200 ISO||80 - 51,200 ISO|
|Screen Specs||Pentax K-S2||Zeiss ZX1|
|Viewfinder Type||Optical viewfinder||Electronic viewfinder|
|Viewfinder Field of View||100%||100%|
|Viewfinder Resolution||6221k dots|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||4.3inch|
|LCD Resolution||921k dots||2765k dots|
|LCD Attachment||Swivel screen||Fixed screen|
|Touch Input||no Touchscreen||Touchscreen|
|Shooting Specs||Pentax K-S2||Zeiss ZX1|
|Focus System||Phase-detect AF||Contrast-detect AF|
|Manual Focusing Aid||Focus Peaking||no Peaking Feature|
|Continuous Shooting||5.4 shutter flaps/s||3 shutter flaps/s|
|Electronic Shutter||no E-Shutter||up to 1/8000s|
|Time-Lapse Photography||Intervalometer built-in||no Intervalometer|
|Image Stabilization||In-body stabilization||no handshake reduction|
|Fill Flash||Build-in Flash||no On-Board Flash|
|Storage Medium||SDXC cards||Internal SSD|
|Second Storage Option||Single card slot||Single SSD|
|Connectivity Specs||Pentax K-S2||Zeiss ZX1|
|USB Connector||USB 2.0||USB 3.1|
|HDMI Port||micro HDMI||no HDMI|
|Microphone Port||External MIC port||no MIC socket|
|Wifi Support||Wifi built-in||Wifi built-in|
|Near-Field Communication||NFC built-in||NFC built-in|
|Bluetooth Support||no Bluetooth||Bluetooth built-in|
|Body Specs||Pentax K-S2||Zeiss ZX1|
|Environmental Sealing||Weathersealed body||not weather sealed|
|Battery Life (CIPA)||410 shots per charge||250 shots per charge|
123 x 91 x 73 mm
(4.8 x 3.6 x 2.9 in)
142 x 93 x 46 mm
(5.6 x 3.7 x 1.8 in)
|Camera Weight||678 g (23.9 oz)||800 g (28.2 oz)|
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