Pentax K-S1 vs Sony A77 II
Portability
69 Imaging
62 Features
70 Overall
65
69 Imaging
62 Features
70 Overall
65
Portability
62 Imaging
64 Features
85 Overall
72
62 Imaging
64 Features
85 Overall
72
Pentax K-S1 vs Sony A77 II Key Specs
Pentax K-S1
(Full Review)
(Full Review)
- 20MP - APS-C Sensor
- 3" Fixed Screen
- ISO 100 - 51200
- Sensor based Image Stabilization
- No Anti-Alias Filter
- 1/6000s Max Shutter
- 1920 x 1080 video
- Pentax KAF2 Mount
- 558g - 121 x 93 x 70mm
- Revealed August 2014
- Successor is Pentax K-S2
Sony A77 II
(Full Review)
(Full Review)
- 24MP - APS-C Sensor
- 3" Fully Articulated Screen
- ISO 50 - 25600
- Sensor based Image Stabilization
- 1/8000s Max Shutter
- 1920 x 1080 video
- Sony/Minolta Alpha Mount
- 647g - 143 x 104 x 81mm
- Released May 2014
- Previous Model is Sony A77
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Below, we will be analyzing the Pentax K-S1 and Sony A77 II, both Advanced DSLR digital cameras by competitors Pentax and Sony. The resolution of the K-S1 (20MP) and the A77 II (24MP) is relatively similar and they possess the exact same sensor sizes (APS-C).
Snapchat Adds Watermarks to AI-Created ImagesThe K-S1 was introduced 4 months after the A77 II so they are of a similar generation. Each of these cameras come with the identical body type (Mid-size SLR).
Before diving in to a in depth comparison, below is a simple summary of how the K-S1 grades versus the A77 II with regard to portability, imaging, features and an overall mark.
Photography Glossary Pentax K-S1 vs Sony A77 II Gallery
The following is a preview of the gallery photos for Pentax K-S1 and Sony SLT-A77 II. The whole galleries are available at Pentax K-S1 Gallery and Sony A77 II Gallery.
Reasons to pick Pentax K-S1 over the Sony A77 II
| K-S1 | A77 II |
|---|
Reasons to pick Sony A77 II over the Pentax K-S1
| A77 II | K-S1 | |||
|---|---|---|---|---|
| Screen type | Fully Articulated |  | Fixed | Fully Articulating screen |
| Screen resolution | 1229k |  | 921k | Crisper screen (+308k dot) |
| Selfie screen |  | Easy selfies |
Common features in the Pentax K-S1 and Sony A77 II
| K-S1 | A77 II | |||
|---|---|---|---|---|
| Released | August 2014 |  | May 2014 | Similar generation |
| Focus manually |  | Dial precise focus | ||
| Screen dimension | 3" |  | 3" | Identical screen dimensions |
| Touch friendly screen |  | Lack of Touch friendly screen |
Pentax K-S1 vs Sony A77 II Physical Comparison
For those who are looking to travel with your camera frequently, you will want to take into account its weight and dimensions. The Pentax K-S1 features external dimensions of 121mm x 93mm x 70mm (4.8" x 3.7" x 2.8") along with a weight of 558 grams (1.23 lbs) and the Sony A77 II has dimensions of 143mm x 104mm x 81mm (5.6" x 4.1" x 3.2") and a weight of 647 grams (1.43 lbs).
See the Pentax K-S1 and Sony A77 II in the latest Camera with Lens Size Comparison Tool.
Keep in mind, the weight of an Interchangeable Lens Camera will differ dependant on the lens you select at that moment. Below is the front view over all size comparison of the K-S1 compared to the A77 II.
Taking into account dimensions and weight, the portability grade of the K-S1 and A77 II is 69 and 62 respectively.
Pentax K-S1 vs Sony A77 II Sensor Comparison
Sometimes, it is tough to visualize the difference between sensor dimensions merely by going over specs. The picture underneath will help give you a more clear sense of the sensor sizes in the K-S1 and A77 II.
All in all, both of those cameras posses the exact same sensor measurements albeit different resolution. You should count on the Sony A77 II to offer you extra detail using its extra 4 Megapixels. Higher resolution will allow you to crop shots somewhat more aggressively.
Pentax K-S1 vs Sony A77 II Screen and ViewFinder
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Portrait Comparison
Pentax K-S1 Portrait photography info
Sony A77 II Portrait photography info
manual focus
megapixel count decent (20 megapixels)
sensor size is decent (APS-C)
has face detection autofocus
delivers RAW files
manual focus
decent megapixels (24 megapixels)
decent sensor size (APS-C)
comes with face detect focus
saves RAW files
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Pentax K-S1 Street photography info
Sony A77 II Street photography info
has image stabilization (Sensor based)
sensor size is decent (APS-C)
delivers RAW files
lighter than competition in class (558g)
good high ISO (51,200)
screen is fixed
fully articulated screen
image stabilization (Sensor based)
decent sensor size (APS-C)
saves RAW files
environment sealing
above average ISO range (25,600)
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Pentax K-S1 Sports photography details
Sony A77 II Sports photography details
maximum shutter speed is high (1/6,000 seconds)
has image stabilization (Sensor based)
megapixel count decent (20 megapixels)
sensor size is decent (APS-C)
has tracking autofocus
sensor has phase detect autofocus
very slow continuous shooting (5.4 frames/s)
low battery life (410 shots)
great max shutter speed (1/8,000 seconds)
image stabilization (Sensor based)
decent megapixels (24 megapixels)
decent sensor size (APS-C)
comes with tracking focus
environment sealing
supports phase detect auto focus
not so great battery (480 shots)
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Pentax K-S1 Travel photography information
Sony A77 II Travel photography information
lighter than competition in class (558 grams)
megapixel count decent (20MP)
has built in flash
missing Timelapse function
low battery life (410 per charge)
screen isn't selfie friendly
environment sealing
decent megapixels (24MP)
has built in flash
display is selfie friendly
no Timelapse function
not so great battery (480 per charge)
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Pentax K-S1 Landscape photography information
Sony A77 II Landscape photography information
manual focus
change lenses (Pentax KAF2 mount)
pretty good screen size (3 inch)
has image stabilization (Sensor based)
megapixel count decent (20MP)
sensor size is decent (APS-C)
doesnt have low pass filter
good high ISO (51,200)
delivers RAW files
low battery life (410 per charge)
missing Timelapse function
manual focus
change lenses (Sony/Minolta Alpha mount)
screen size is good (3")
image stabilization (Sensor based)
decent megapixels (24MP)
decent sensor size (APS-C)
above average ISO range (25,600)
saves RAW files
environment sealing
not so great battery (480 CIPA)
no Timelapse function
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Pentax K-S1 Vlogging factors
Sony A77 II Vlogging factors
has image stabilization (Sensor based)
has face detection autofocus
great video quality (1920 x 1080 resolution)
lighter than competition in class (558 grams)
screen isn't selfie friendly
missing external microphone jack
display is selfie friendly
image stabilization (Sensor based)
comes with face detect focus
great video quality (1920 x 1080 pixels)
comes with microphone socket
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Pentax K-S1 vs Sony A77 II Specifications
| Pentax K-S1 | Sony SLT-A77 II | |
|---|---|---|
| General Information | ||
| Company | Pentax | Sony |
| Model | Pentax K-S1 | Sony SLT-A77 II |
| Category | Advanced DSLR | Advanced DSLR |
| Revealed | 2014-08-27 | 2014-05-21 |
| Physical type | Mid-size SLR | Mid-size SLR |
| Sensor Information | ||
| Processor | Prime MII | Bionz X |
| Sensor type | CMOS | CMOS |
| Sensor size | APS-C | APS-C |
| Sensor measurements | 23.5 x 15.6mm | 23.5 x 15.6mm |
| Sensor surface area | 366.6mm² | 366.6mm² |
| Sensor resolution | 20 megapixel | 24 megapixel |
| Anti aliasing filter | ||
| Aspect ratio | 3:2 | 3:2 and 16:9 |
| Highest resolution | 5472 x 3648 | 6000 x 4000 |
| Highest native ISO | 51200 | 25600 |
| Lowest native ISO | 100 | 50 |
| RAW support | ||
| Autofocusing | ||
| Focus manually | ||
| AF touch | ||
| Continuous AF | ||
| Single AF | ||
| AF tracking | ||
| AF selectice | ||
| Center weighted AF | ||
| AF multi area | ||
| Live view AF | ||
| Face detection focusing | ||
| Contract detection focusing | ||
| Phase detection focusing | ||
| Number of focus points | 11 | 79 |
| Cross focus points | - | 15 |
| Lens | ||
| Lens mount | Pentax KAF2 | Sony/Minolta Alpha |
| Available lenses | 151 | 143 |
| Focal length multiplier | 1.5 | 1.5 |
| Screen | ||
| Screen type | Fixed Type | Fully Articulated |
| Screen sizing | 3 inches | 3 inches |
| Resolution of screen | 921 thousand dots | 1,229 thousand dots |
| Selfie friendly | ||
| Liveview | ||
| Touch friendly | ||
| Viewfinder Information | ||
| Viewfinder | Optical (pentaprism) | Electronic |
| Viewfinder resolution | - | 2,359 thousand dots |
| Viewfinder coverage | 100% | 100% |
| Viewfinder magnification | 0.64x | 0.73x |
| Features | ||
| Slowest shutter speed | 30 seconds | 30 seconds |
| Maximum shutter speed | 1/6000 seconds | 1/8000 seconds |
| Continuous shooting rate | 5.4fps | 12.0fps |
| Shutter priority | ||
| Aperture priority | ||
| Manually set exposure | ||
| Exposure compensation | Yes | Yes |
| Change WB | ||
| Image stabilization | ||
| Built-in flash | ||
| Flash range | 10.00 m (at ISO 100) | 12.00 m (at ISO 100) |
| Flash modes | Auto, auto + redeye, on, on + redeye reduction, slow sync, trailing curtain sync, manual | Auto, fill, rear sync, slow sync |
| External flash | ||
| AEB | ||
| White balance bracketing | ||
| Maximum flash synchronize | - | 1/250 seconds |
| Exposure | ||
| Multisegment | ||
| Average | ||
| Spot | ||
| Partial | ||
| AF area | ||
| Center weighted | ||
| Video features | ||
| Video resolutions | 1920 x 1080 (30,25,24 fps), 1280 x 720 (60,50 fps) | 1920 x 1080 (60p, 60i, 30p), 1440 x 1080 (30p), 640 x 480 (30p) |
| Highest video resolution | 1920x1080 | 1920x1080 |
| Video data format | H.264 | MPEG-4, AVCHD, XAVC S |
| Microphone port | ||
| Headphone port | ||
| Connectivity | ||
| Wireless | Eye-Fi Connected | Built-In |
| Bluetooth | ||
| NFC | ||
| HDMI | ||
| USB | USB 2.0 (480 Mbit/sec) | USB 2.0 (480 Mbit/sec) |
| GPS | Optional | None |
| Physical | ||
| Environmental sealing | ||
| Water proof | ||
| Dust proof | ||
| Shock proof | ||
| Crush proof | ||
| Freeze proof | ||
| Weight | 558 gr (1.23 lbs) | 647 gr (1.43 lbs) |
| Dimensions | 121 x 93 x 70mm (4.8" x 3.7" x 2.8") | 143 x 104 x 81mm (5.6" x 4.1" x 3.2") |
| DXO scores | ||
| DXO All around score | 78 | 82 |
| DXO Color Depth score | 23.5 | 24.4 |
| DXO Dynamic range score | 13.0 | 13.4 |
| DXO Low light score | 1061 | 1013 |
| Other | ||
| Battery life | 410 pictures | 480 pictures |
| Style of battery | Battery Pack | Battery Pack |
| Battery model | D-LI109 | NP-FM500H |
| Self timer | Yes ( 2 or 12 seconds) | Yes (Yes (2 or 12 sec)) |
| Time lapse feature | ||
| Type of storage | SD/SDHC/SDXC | SD/ SDHC/SDXC, Memory Stick Pro Duo/ Pro-HG Duo |
| Card slots | One | One |
| Launch pricing | $339 | $1,198 |