Pentax K-S1 Review

February 4, 2015 | Jack Baker | |
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Specifications

Type
Camera Type

TTL autofocus, auto-exposure SLR digital-still camera with built-in retractable P-TTL flash

AA Filter Simulator: Moiré reduction using SR unit. OFF/Type1/Type2/Bracket

Sensor
Type CMOS with primary color filter
Size 23.5 x 15.6mm
Total Pixels approx. 20.42MP
Effective Pixels approx. 20.12MP
Still

JPEG:L(20M: 5472x3648), M(12M:4224x2816), S(6M:3072x2048), XS(2M:1920x1280)

4 quality level of JPEG ★★★ (Best), ★★ (Better), ★ (Good)

RAW:L(20M:5472x3648)
RAW (12bit): PEF, DNG

File Format RAW (PEF/DNG), JPEG (Exif 2.30), DCF2.0 compliant

RAW and JPEG simultaneously recordable

Movie

Full HD (1920x1080, 16:9, 30fps/25fps/24fps)

HD (1280x720, 16:9, 60fps/50fps/30fps/25fps/24fps)

VGA (640x480, 4:3, 30fps/25fps/24fps)

Quality levels ★★★(Best), ★★(Better), ★(Good)

Sensitivity ISO AUTO/100 to 51200 (EV steps can be set to 1EV, 1/2EV, or 1/3EV)
Shake Reduction Sensor shift Shake Reduction
Sensor Cleaning Dust Removal: SP coating and CMOS sensor operations
Lens
Mount PENTAX KAF2 bayonet mount (AF coupler, lens information contacts, K-mount with power contacts)
Usable lenses KAF3, KAF2 (power zoom not compatible), KAF, KA mount lenses
Focusing System
Type SAFOX IXi+ with TTL, phase-matching autofocus
Functions

Focus Sensor: 11 point (9 cross type focus points in the center)

Brightness Range: EV-1 to 18 (ISO 100 / at normal temperature)

AF Point Selection: Auto: 5 points, Auto: 11 points, Select, Expanded Area Select, Spot

AF Modes Single AF (AF.S), Continuous AF (AF.C), Auto select AF (AF.A)
AF assist Dedicated LED AF assist light
Viewfinder
Type

Pentaprism Finder

Field of View

Approx. 100%

Magnification

Approx. 0.95x (50mm F1.4 at infinity)

Focusing screen

Interchangeable Natural-Bright-Matte III focusing screen

Indication

Eye-Relief Length: Approx. 20.5mm (from the view window), Approx 22.3mm (from the center of lens)

Diopter adjustment

Approx. -2.5m to + 1.5m-1

Screen
Type

3’’ (7.6cm), TFT color LCD monitor, wide angle viewing,
Brightness, Saturation and Colors adjustable

Resolution Approx. 921k dots
Playback

Single frame, multi-image display (6,12, 20, 35, 80 segmentation), Display magnification (up to 16x, Quick magnification available), Rotating, Histogram (Y histogram, RGB histogram), Bright area warning, Detailed inf, Copyright Information (Photographyer, Copyright holder), Folder Display, Calendar Filmstrip Display, Slide Show, GPS information (Latitude, Longitude, Altitude, Time (UTC), Direction

Liveview
LiveView

Type: TTL method using CMOS image sensor

Focusing Mechanism:
Contrast detection ( Face Detection, Face Detection Assist, Tracking, Multiple AF points, Select, Spot)
Focus peaking: ON/OFF

Display:
Field of View approx. 100%, Magnified view (2x, 4x, 8x, 10x),
Grid display (4x4 Grid, Golden Section, Scale display), Histogram, Bright area warning

Shutter
Type Electronically controlled vertical-run focal plan shutter
Speed Auto: 1/6000 to 30 sec., Manual: 1/6000 to 30 sec. (1/3EV step or 1/2EV step), Bulb.
X-Synchronization Sync Speed : 1/180 sec.
Exposure system
Metering TTL open aperture, 77 segmented metering, center-weighted and spot metering
Exposure Modes

Auto Picture mode (Standard, Portrait, Landscape, Macro, Moving Object, Night Scene Portrait, Sunset, Blue Sky, Forest), Scene Mode: Portrait, Landscape, Macro, Moving Object, Night Scene Portrait, Sunset, Blue Sky, Forest, Night Scene, Night Scene HDR*, Night Snap, Food, Pet, Kids, Surf & Snow, Backlight Silhouette, Candlelight, Stage Lighting, Museum

EFFECT Mode: Faded Color, Clear Tone, Brilliant Color, Unicolor Bold, Vintage Color, Cross Processing, Warm Fade, Tone Expansion, Bold Monochrome, Infrared FIlter, Vibrant Color Enhance Program, Sensitivity Priority, Shutter Priority, Aperture Priority, Shutter & Aperture Priority, Manual, Bulb

*JPEG only

Metering Range EV0 to 22 (ISO100 at 50mm F1.4)
Auto Exposure Lock Can be assigned to the AF/AE-L button from the menu
Compensation ± 5EV (1/2EV step or 1/3EV can be selected)
Flash
Type

Built-in retractable P-TTL auto pop-up flash

Guide Number

approx. 10 (ISO 100/m)

Modes

Auto Flash Discharge, Auto Flash + Red-eye Reduction (Auto Picture, Scene) Flash On, Flash On+ Red-eye Reduction, Slow-speed Sync, Trailing Curtain Sync, Manual Flash Discharge (Full-1/128)

External Flash: P-TTL, Leading Curtain Sync, Trailing Curtain Sync, Contrast-control-sync, High-speed sync, wireless sync (available with 2 dedicated external flash)

Angle of View Coverage

Angle of view: coverage: wide angle-lens, equ. to 28mm in 35mm format

Exposure Compensation –2.0 to +1.0 EV
Exposure Parameters
Modes

Drive Modes

Mode Selection:

Single frame, Continuous (Hi, Lo), Self-timer (12sec., 2sec.), Remote Control (0 sec., 3 sec.), Auto Bracketing (3 frames)

Movie: Remote Control

Continuous shooting :

Max. approx. 5.4 fps, JPEG ( L: ★★★ at Continuous H): up to approx. 20 frames, RAW: up to approx. 5 frames
Max. approx. 3.0 fps, JPEG L: ★★★ at Continuous L): up to approx. 100 frames, RAW: up to approx. 8 frames
*ISO100

Capture Functions

Custom Image: Bright, Natural, Portrait, Landscape, Vibrant, Radiant, Muted, Bleach Bypass, Reversal Film, Monochrome, Cross Processing

Noise Reduction: Slow Shutter Speed NR, High-ISO NR

Dynamic Range Setting: Highlight Correction, Shadow Correction

Lens Correction: Distortion Correction, Lateral Chromatic Aberration Correction, Peripheral Illumin. Correction, Diffraction Correction

Digital Filter: Extract Color, Replace Color, Toy Camera, Retro, High Contrast, Shading, Invert Color, Unicolor Bold, Bold Monochrome

HDR Capture: Auto, HDR1, HDR2, HDR3, Exposure Bracket Value adjustable, Automatic composition correction function

White Balance

Type: Method using a combination of the CMOS image sensor and the light source detection sensor

White Balance: AUTO WB, Multi Auto WB, Daylight, Shade, Cloudy, Fluorescent Light (D:Daylight Color, N:Daylight White, W:Cool White, L:Warm White), Tungsten Light, Flash, CTE, Manual WB, Color Temperature Configuration, Copying the white balance setting of a captured image

Fine Adjustment: Adjustable ±7 steps on A-B axis or G-M axis

Digital Filter

Extract Color, Replace Color, Toy Camera, Retro, High Contrast, Shading, Invert Color, Unicolor Bold, Bold Monochrome

Movie
Recording

File Format: MPEG-4 AVC/H.264 (MOV)

Recorded Pixels: Full HD(1920x1080, 30p/25p/24p), HD (1280x720, 60p/50p)

Sound: Built-in stereo microphone, Recording Sound Level adjustable.

Recording Time: Up to 25 minutes or 4GB ; automatically stops recording if the internal temperature of the camera becomes high.

Custom Images: Bright, Natural, Portrait, Landscape, Vibrant, Radiant, Muted, Bleach Bypass, Reversal Film, Monochrome, Cross Processing

Cross Processing: Randum, Preset 1-3, Favorite 1-3.

Digital Filter: Extract Color, Replace Color, Toy Camera, Retro, High Contrast, Shading, Invert Color, Unicolor Bold, Bold Monochrome

Editing Divide or delete selected frames, Capturing a JPEG still picture from a movie
Playback
Digital Filter

Base Parameter Adj, Extract Color, Replace Color, Toy Camera, Retro, High Contrast, Shading, Invert Color, Unicolor Bold, Bold Monochrome, Tone Expansion, Sketch, Water Color, Pastel, Posterization, Miniature, Soft, Starburst, Fish-eye, Slim, Monochrome

Options

Playback View:

Single frame, multi-image display (6,12, 20, 35, 80 segmentation), Display magnification (up to 16x, Quick magnification available), Rotating, Histogram (Y histogram, RGB histogram), Bright area warning, Detailed inf, Copyright Information (Photographyer, Copyright holder), Folder Display, Calendar Filmstrip Display, Slide Show, GPS information (Latitude, Longitude, Altitude, Time (UTC), Direction

Delete: Delete single image, Delete all, Select & delete, Delete folder, Delete instant review image

RAW Development:

RAW file select: Select Single Image, Select Multiple Images, Select a folder

RAW Development Parameter:

File Format (JPEG), Aspect ratio, JPEG recorded pixels, JPEG Quality, Color Space, Distortion Correction, Lateral Chromatic Aberration Correction, Peripheral Illumin. Correction, Diffraction Correction, Color Fringe Correction, White Balance, Custom Image, Digital Filter, Sensitivity, High-ISO NR, Shadow Correction

Edit: Color Moiré Correction, Resize, Cropping (Aspect ratio and Slant adjustment available), Movie

Edit (Divide or Delete selected frames), Capturing a JPEG still picture from a movie, Saving RAW data in buffer memory, Eye-Fi Image Transfer

Storage
External

Compatible with SD, SDHC, and SDXC Memory Card (Conforms to USH-1 standards), Eye-Fi card, FLU card.

File Format

RAW (PEF/DNG), JPEG (Exif 2.30), DCF2.0 compliant

Image sizes:

JPEG: L(20M: 5472x3648), M(12M:4224x2816), S(6M:3072x2048), XS(2M:1920x1280)

RAW: L(20M:5472x3648)

Quality level:

RAW: (12bit): PEF, DNG

JPEG: ★★★ (Best), ★★ (Better), ★ (Good)

RAW and JPEG simultaneously recordable

Color space: sRGB, Adobe RGB

File Name

Storage Folder:

Folder name: Date (100_1018,101_1019...) or User assigned folder name (Default "PENTX")

Recording File:

File name: ""IMGP****"" or User assingned file name

File name numbering: Sequential, Reset

Special Features
Features

World time : 75 cities, 28 time zones

Custom Functions : 26 items

Mode Memory : 11 items

Button/Dial Customization: 

Green Button (Green Button, One Push File Format, Optical Preview, Digital Preview, Select AF Point)
AF/AE-L Button (AF1, AF2, Cancel AF, AE Lock) Separate customization for movie available
E-Dial Programming (Rotate Right, Rotate Left)

Text Size: Standard, Large

AF Fine Adjustment: ±10 step, Uniform adjustment, Individual adjustment (up to 20 can be saved)

Copyright Information: Names of "Photographer" and "Copyright Holder" are embedded to the image file.
Revision history can be checked using the provided software.

Language

English, French, German, Spanish, Portuguese, Italian, Dutch, Danish, Swedish, Finnish, Polish, Czech, Hungarian, Turkish, Greek, Russian, Korean, Chinese (Simplified), Chinese (Traditional) and Japanese

Interface
Interface

Connection Port: USB2.0 (micro B, high-speed compatible), HDMI output terminal (Type D)

USB Connection: MSC/PTP

Power
Source

Battery Type: Rechargeable Lithium-ion Battery D-LI109

AC Adapter: AC Adapter Kit K-AC128 (Optional)

Performance

Number of recordable images:

(with 50% flash usage): approx. 410 images,
(without flash usage): approx: 480 images

Playback time: Approx. 270 minutes

* With a fully-recharged Rechargeable Lithium-ion Battery under the temperature at 23°C. Tested in compliance with CIPA standard.

Actual results may vary depending on the shooting condition.

Dimensions
Height 92.5mm
Width 120mm
Depth

69.5mm

Weight

Approx. 558g (Including dedicated battery and 1x SD Memory Card),

Approx. 498g (body only)

Compatibility
PC

Windows Vista, 7, 8 and 8.1

Mac 10.6 or above
Accessories
Included Software

Digital Camera Utility 5

Kit Content

Rechargeable Lithium-ion Battery D-LI109
Battery Charger D-BC109
AC cable D-COE
Strap O-ST132
Software (CD-ROM) S-SW151
Eyecup FR
Hot shoe cover FK
Body mount cover
Lens front ring O-FR52 black or white

Optional

Lens front ring O-FR52 set - 31577
Flucard for Pentax 16GB O-FC1 - 38610*
Lithium-Ion battery D-LI109 - 39067
Battery Charger kit K-BC109 - 39032
AC Adapter Kit K-AC128- 38822
Black SLR case - 50099
White SLR case - 50276
SLR backpack - 50278
Remote control O-RC1 - 39892
Ring fl ash AF 160FC - 30477
Flash AF 200FG - 30465
Flash AF 360FGZ II - 30438
Flash AF 540FGZ II - 30456
O-ICK1 sensor cleaning kit - 39357
O-GPS1 GPS unit - 39012 **

*FLU Card: Remote Release, Image Browsing

**GPS Unit: O-GPS1:Latitude, Longitude, Altitude, Time (UTC), Direction Electronic Compass, ASTROTRACER