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Pentax Camera Comparison
General Data
Camera ThumbnailPentax K20DPentax K-xPentax K-S1
Camera NamePentax K20DPentax K-xPentax K-S1
Year Introduced200820092014
AvailabilityDiscontinued (2009)Discontinued (2010)Discontinued (2016)
Current PriceFind on eBay | PF MarketplaceFind on eBay | PF MarketplaceFind on eBay | PF Marketplace
In-Depth ReviewN/AN/APentax K-S1 review
User ReviewsBrowseBrowseBrowse
Sensor
Sensor FormatAPS-CAPS-CAPS-C
Sensor TypeCMOSCMOSCMOS
Megapixels14.612.420.12
Resolution3104 x 4672 pixels2848 x 4288 pixels3648 x 5472 pixels
AA FilterYesYesNo (AA filter simulator)
Super ResolutionNoNoNo
Bit Depth121212
Minimum ISO100100100
Maximum ISO32001280051200
ISO Range100 - 3200 (100 - 6400)200 - 6400 (100 - 12800)100 - 51,200
Imaging
ProcessorPRIMEPRIMEPRIME M II
Exposure ModesGreen, HyP, Sv, Av, Tv, TAv, HyM, X, BAuto Picture, Scene, P, Sv, Av, Tv, M, BAuto Picture, Scene, EFFECT, P, Sv, Av, Tv, TAv, M, B
Program ModesNormal, Action, Depth of Field, MTFNormal, Portrait, Landscape, Macro, Action, Night-scene Portrait, Flash Off. In live view also: Blue Sky, SunsetNormal
Scene ModesNone10: Night Scene, Surf and Snow, Food, Sunset, Stage Lighting, Night Snap, Kids, Pet, Candlelight, Museum20: Standard, Portrait, Landscape, Macro, Moving Object, Night Scene Portrait, Sunset, Blue Sky, Forest, Night Scene, Night Scene HDR (JPG only), Night Snap, Food, Pet, Kids, Surf & Snow, Backlight Silhouette, Candlelight, Stage Lighting, Museum
RestrictionsExposure modes with M and K lenses are restricted to Av (with aperture always wide open) and M (with stop-down metering)Exposure modes with M and K lenses are restricted to Av (with aperture always wide open) and M (with stop-down metering)Exposure modes with M and K lenses are restricted to Av (with aperture always wide open) and M (with stop-down metering)
Shutter Speeds (Auto)30s - 1/4000s (stepless)30s - 1/6000s (stepless)30s - 1/6000s (stepless)
Shutter Speeds (Manual)B, 30s - 1/4000sB, 30s - 1/6000sB, 30s - 1/6000s, Up to 300s in Astrotracer mode
High ISO NRYes, three levelsOff, Low/Medium/High (ISO where to start is customizable)Off, Auto, Low/Medium/High, Custom by ISO
Slow Shutter NRYes (can be turned off except for long shutter speeds)On, Off (still On in Bulb mode)Off, Auto, On
Shutter LifeNot Specified100,000Not Specified
Maximum FPS34.75.4
Continuous ShootingHi: 3 fps up to 38 frames (JPG), 14 franes (PEF), 16 frames (DNG) Lo: 2.3 fps until card is full (JPG) Burst mode: 21 fps up to 115 frames (1024 x 1536 JPG)Hi: 4.7 fps to 17 frames (JPG), 5 frames (RAW) Lo: 2 fps until card is full (JPG), up to 11 frames (RAW)Hi: 5.4 fps up to 20 frames (JPG), 5 frames (RAW) Lo: 3 fps up to 100 frames (JPG), 8 frames (RAW)
Exposure Compensation+/-3 EV+/-3 EV+/-5 EV
Auto BracketingExposure (3 or 5 frames), one-push EV bracketingExposure (3 frames)Exposure (3 frames), one-push EV bracketing
Expanded Dynamic RangeHighlight (on, off)Highlight (on, off),
Shadow (high, medium, low, off)
Highlight (auto, on, off),
Shadow (auto, high, medium, low, off)
Metering Sensor16-Segment16-Segment77-Segment
Meter Range0 to 21 EV1 to 21.5 EV0 to 22 EV
Meter PatternMulti-Segment,Center Weighted,SpotMulti-Segment,Center Weighted,SpotMulti-Segment,Center Weighted,Spot
Exposure LockYesYesYes
Self Timer2 s with mirror lock-up, 12 s2 s with mirror lock-up, 12 s2 s with mirror lock-up, 12 s
Interval ShootingUp to 99 frames, up to 24 hours between framesNoNo
Mirror Lock-upYesYesYes
HDR ModeNoYesYes
Multiple ExposuresYes, average and additive, 2 to 9 shotsYes, average and additive, 2 to 9 shotsNo
Pixel MappingYesYesYes
Optics/Mount
MountKAF2 (no aperture coupler)KAF2 (no aperture coupler)KAF2 (no aperture coupler)
Composition AdjustmentNoNoNo
Supported LensesAll Pentax K-mount lenses except for lenses with the KAF4 mount variant. Manual focus only with K-, M-, and A-series lenses. Stop down metering only with K- and M-series lenses. M42, Pentax 645 and Pentax 6x7 lenses with the appropriate adapters (stop down metering and manual focus only).All Pentax K-mount lenses except for lenses with the KAF4 mount variant. Manual focus only with K-, M-, and A-series lenses. Stop down metering only with K- and M-series lenses. M42, Pentax 645 and Pentax 6x7 lenses with the appropriate adapters (stop down metering and manual focus only).All Pentax K-mount lenses. Support for lenses with the KAF4 mount variant requires a firmware update. Manual focus only with K-, M-, and A-series lenses. Stop down metering only with K- and M-series lenses. M42, Pentax 645 and Pentax 6x7 lenses with the appropriate adapters (stop down metering and manual focus only).
StabilizationYes (sensor-shift SR)Yes (sensor-shift SR)Yes (sensor-shift SR)
Autofocus (viewfinder)Yes (SAFOX VIII, 11 focus points (9 cross type))Yes (SAFOX VIII, 11 focus points (9 cross type))Yes (SAFOX IXi+, 11 focus points (9 cross type))
AF Points111111
Autofocus Sensitivity-1 to 19 EV-1 to 18 EV-1 to 18 EV
Autofocus With SDMYesYesYes
Autofocus AssistStroboscopic FlashN/ADedicated LED
Autofocus ModesSingle Shot, Continuous, AutoViewfinder: AF.S, AF.C, AF.A.
Live view: Face detection, Tracking, Multiple AF points, Select, Spot
Front/Back Focus CorrYes (adjustments for up to 20 lenses)NoYes (adjustments for up to 20 lenses)
Power ZoomNot supportedNot supportedNot supported
Lens CorrectionNoneDistortion,Lateral Chromatic AberrationDistortion,Lateral Chromatic Aberration,Vignetting,Diffraction
Video
Video/Movie ModeNo1280x720 (16:9) at 24 fps,
640x416 (3:2) at 24 fps.
Composite video out (no HDMI out)
1920x1080 (16:9 Full HD) at 30p, 25p, 24p
1280x720 (16:9) at 60p, 50p
MPEG4 AVC/H.264
Video StabilizationSensor-shift SRElectronic
Exposure ModesP, Av and M
Movie Mode RestrictionsN/AThe aperture is fixed during recordingIn Av and M mode: Aperture must be set prior to shooting (unless using a lens with manual aperture setting)
AF During RecordingNoNoNo
Sound In Movie ModeN/AMono (built-in mic) No provision for external micStereo
Flash
Built-in FlashYes, GN 13 (ISO 100/m)Yes, GN 12 (ISO 100/m)Yes, GN 10 (ISO 100/m)
Sync Speed1/180s1/180s1/180s
P-TTL FlashYesYesYes
TTL FlashNoNoNo
Flash Exposure Comp-2 to 1 EV-2 to 1 EV-2 to 1 EV
Flash FunctionsAuto discharge, On (leading curtain sync), Redeye reduction, Slow-speed sync, Trailing curtain sync, High-speed sync*, Manual*, Wireless*, Contrast control* * Available when combined with external flashAuto discharge, On (leading curtain sync), Redeye reduction, Slow-speed sync, Trailing curtain sync, High-speed sync*, Manual*, Wireless*, Contrast control* * Available when combined with external flashAuto discharge, On (leading curtain sync), Redeye reduction, Slow-speed sync, Trailing curtain sync, High-speed sync*, Manual, Wireless*, Contrast control* * Available when combined with external flash
Viewfinder/LCD
Viewfinder0.95x, 95%0.85x, 96%0.95x, 100%
Viewfinder TypePentaprismPentamirrorPentaprism
Diopter Adjustment-2.5 to +1.5-2.5 to +1.5-2.5 to +1.5
AF Points In ViewfinderYesNoYes
Exchangeable ScreenYesNoYes
Depth Of Field PreviewYesYesYes
Digital PreviewYes (with image magnificaion)Yes (with image magnificaion)Yes (with image magnificaion)
Live ViewYesYesYes
Focus PeakingNoNoYes
Back LCD2.7 in. 230,000 pix2.7 in. 230,000 pix3 in. 921,000 dots, 3:2
Top LCDYesNoNo
Body
Weather ResistantYesNoNo
GPSNot SupportedNot SupportedVia Accessory
Control Wheels211
Camera Controls2 control wheels Many dedicated buttons One user mode setting1 control wheel. Most functions accessed through control panel or menus1 control wheel. Most functions accessed through control panel or menus
Dust RemovalYes, Sensor Shake DRYes, Sensor Shake DRYes, Sensor Shake DR
Dust AlertYesYesNo
File FormatPEF (RAW),DNG (RAW),JPGPEF (RAW),DNG (RAW),JPG,AVIPEF (RAW),DNG (RAW),JPG,MOV
Card Slots111
Memory Card TypeSD, SDHCSD, SDHC (max. 32GB), SDXC via firmware updateSD, SDHC, SDXC (UHS-1 compliant), Eye-Fi, FLU card
TetheringWired (native)NoneVia O-FC1 FLUcard
Battery

D-LI50 lithium-ion rechargeable

4 x AA

D-LI109 lithium-ion rechargeable

Battery Grip

D-BG2 with D-LI50

No

No

Battery Life740 images without flash480 images with Li-Ion battery (no flash use) 410 images with Li-Ion battery (50% flash use)
Size (W X H X D)141.5 x 101 x 70 mm122.5 x 91.5 x 67.5 mm120 x 92.5 x 69.5 mm 4.72 x 3.65 x 2.75 in.
Weight715 g515 g (580 g with lithium batteries and SD card)558 g (19.7 oz) with battery
ConnectivityUSB 2.0/Video out, DC in, X-sync, cable releasePC/AV terminal (USB 2 compatible)USB 2.0, HDMI out
Latest Firmware

Version 1.04

Version 1.03

Link to Download Page

NotesIn-camera RAW developmentEmbed copyright information in EXIF,
In-camera RAW development
Astrotracer compatible,
Embed copyright information in EXIF,
High ISO NR can be customized for each major ISO value,
In-camera RAW development,
Image plane indicator
Colors / Special Editions

Titanium





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