Pentax K-x Review

 
Camera Reviews / Pentax Cameras / Pentax SLR i Full Review

Pentax K-x Feature Comparison

The chart below compares the K-x with its bigger brother, the K-7, as well as its predecessor, the K2000. What we've done below is presented something of a hybrid comparison between these three models. A red cell means that a given camera performs below the other two, a green cell means that it performs better than the other two, and a yellow cell means it falls between the other two. In cases where two cameras share a superior capability, both cells will be colored green.

Pentax K-x vs other Pentax SLRs
Manufacturer
Pentax
Pentax
Pentax
Model
K-7
K-x
K2000 / K-m
Imaging
System
Sensor Manufacturer
Samsung
Sony
Sony
Sensor Type
CMOS
CMOS
CCD
Color Filter Array
RGB
RGB
RGB
Total Megapixels
15.07
12.9
10.75
Effective Megapixels
14.6
12.4
10.2
Effective Sensor Size (mm)
23.4 x 15.6
23.6 x 15.8
23.5 x 15.7
Focal Length Multiplier (approx.)
1.5x
1.5x
1.5x
Image Processor
PRIME II
PRIME II
PRIME
Viewfinder
Type
Eye-level
pentaprism
Eye-level
 pentamirror
Eye-level
 pentamirror
Coverage
100%
96%
96%
Magnification (-1 diopter with 50mm lens at infinity)
0.92x
0.85x
0.85x
Eyepoint (mm)
?
?
?
Dioptric Adjustment Range (diopters)
-2.5 to +1.5
-2.5 to +1.5
-2.5 to +1.5
Focusing Screen
Natural-Bright-Matte III focusing screen; interchangeable
Natural-Bright-Matte II focusing screen; interchangeable
Natural-Bright-Matte II focusing screen; interchangeable?
Viewfinder
Info Display
AF frames, AF points, spot metering area, anti-shake indicator, flash status, shutter speed, aperture, focus indicator, manual focus indicator, AF point move indicator, EV bar, EV compensation indicator, bracketing indicator, flash exposure compensation indicator, AE lock, Auto ISO, available images, ISO sensitivity, EV compensation value, metering mode, multiple exposure, file format
AF frames, spot metering area, anti-shake indicator, flash status, shutter speed, aperture, focus indicator, manual focus indicator, EV compensation indicator, AE lock, available images, ISO sensitivity, EV compensation value, picture mode
AF frames, spot metering area, anti-shake indicator, flash status, shutter speed, aperture, focus indicator, manual focus indicator, EV compensation indicator, AE lock, available images, ISO sensitivity, EV compensation value, picture mode
Depth of Field Preview
Optical & Digital: enabled with depth-of-field preview position on power dial
Optical & Digital: enabled with depth-of-field preview assigned to Green button
Digital Only: Can be assigned to Help button
Recording
System
Recording Media / Quantity / Slot Type
Secure Digital card
 (SDHC compatible)
Secure Digital card
 (SDHC compatible)
Secure Digital card
 (SDHC compatible)
Compatible File System
FAT 16 / FAT 32
FAT 16 / FAT 32
FAT 16 / FAT 32
Recording Formats
RAW (PEF or DNG), JPEG
RAW (PEF or DNG), JPEG
RAW (PEF or DNG), JPEG
Maximum Resolution
4672 x 3104
4288 x 2848
3872 x 2592
Reduced Resolutions (JPEG only)
3936 x 2624
3072 x 2048
1728 x 1152
3936 x 2624
3072 x 2048
1728 x 1152
3008 x 2000
1824 x 1216
RAW + JPEG Recording
Yes
Yes
Yes
Color Space &
White Balance
User-Selectable Color Space
Yes
sRGB + Adobe RGB
Yes
sRGB + Adobe RGB
Yes
sRGB + Adobe RGB
Processing Parameters
(Contrast, Sharpness, Saturation, Color Tone) / # of Increments
±4 steps each for saturation, hue/toning, high/low key, contrast, and sharpness; ±8 for brightness

Custom Image: Bright, Natural, Portrait, Landscape, Vibrant, Muted, Monochrome
±4 steps each for saturation, hue/toning, high/low key, contrast, and sharpness; plus 9 Filter Effects

Custom Image: Bright, Natural, Portrait, Landscape, Vibrant, Muted, Monochrome
±4 steps each for saturation, hue/toning, contrast, and sharpness

Custom Image: Bright, Natural, Portrait, Landscape, Vibrant, Monochrome
WB settings
15 (Daylight, Shade, Cloudy, Fluorescent (D, N, W, L), Tungsten, Flash, Color Temperature (3 setting), CTE, Manual, Auto)
12 (Daylight, Shade, Cloudy, Fluorescent (W, D, N, L), Tungsten, Flash, CTE, Manual, Auto)
8 (Daylight, Shade, Cloudy, Tungsten light, Fluorescent light, Flash, Manual, Auto)
Manual Color Temperature Setting Range
Yes, 2,000-12,000K in 20 mired or 100K steps
Not available
Not available
WB Adjustment Range
±7 steps Blue to Amber and ±7 steps Magenta to Green, in 1-step increments
±7 steps Blue to Amber and ±7 steps Magenta to Green, in 1-step increments
±7 steps Blue to Amber and ±7 steps Magenta to Green, in 1-step increments
Autofocus
System
Type
TTL phase detection by SAFOX VIII+ autofocus module
TTL phase detection by SAFOX VIII autofocus module
TTL phase detection by SAFOX autofocus module
# of Focusing Points (Focusing Point Type)
11 points, (9 cross-type, 2 single-axis)
11 points, (9 cross-type, 2 single-axis)
5 points, (1 cross-type, 4 single-axis)
Superimposed Focus Point Display
Yes
No
No
AF Working Range
EV -1 ~ 18 (ISO 100)
EV -1 ~ 18 (ISO 100)
EV -1 ~ 18 (ISO 100)
AF-assist Beam
Yes, dedicated AF Assist lamp
Yes, stroboscopic flash. Only available when flash is enabled.
Yes, stroboscopic flash. Only available when flash is enabled.
One-shot AF
Available in
Single Shot AF mode
Available in
Single Shot AF mode
Available in
Single Shot AF mode
AI Servo (Tracking) AF
Available in Continuous AF Mode
Available in Continuous AF Mode
Available in Continuous AF Mode
AI Focus AF
Predictive focus control (with moving subjects in Continuous AF modes)
Predictive focus control (with moving subjects in Continuous AF modes)
Predictive focus control (with moving subjects in Continuous AF modes)
Exposure
Control
Shooting Modes
11 - Auto, Program, Shutter Priority, Sensitivity Priority, Aperture Priority, Shutter & Aperture Priority, Manual, Bulb, Flash (X), User, Movie
25 - Auto Picture, Portrait, Landscape, Macro, Moving Object, Night Scene Portrait, Flash Off, Blue Sky, Scene (Night Scene, Surf & Snow, Food, Sunset, Stage Lighting, Kids, Pet, Candlelight, Museum, Night Snap), Program, Sensitivity Priority, Shutter Priority, Aperture Priority, Manual, Bulb, Movie
24 - Auto Picture, Picture (Portrait, Landscape, Macro, Action, Night Scene Portrait, Standard Flash Off), Scene (Night Scene, Surf & Snow, Food, Sunset, Kids, Pet, Candlelight, Museum, Stage Lighting [2M JPG], Night Snap [2M JPG]), Program, Sensitivity Priority, Shutter Priority, Aperture Priority, Manual, Bulb
Metering Zones
77
16
16
Metering Modes
Multi-segment,
center-weighted,
spot
Multi-segment,
center-weighted,
spot
Multi-segment,
center-weighted,
spot
Metering System Working Range
EV 0 ~ 21
(ISO 100, f/1.4 lens)
EV 1 ~ 21.5
(ISO 200, f/1.4 lens)
EV 0 ~ 21
(ISO 100, f/1.4 lens)
ISO Range / Extended
100 ~ 3200 / 6400
100 / 200 ~ 6400 / 12800
100 ~ 3200
Exposure Compensation
+/- 5 EV
in 1/2 EV or 1/3 EV increments
+/- 3 EV
in 1/2 EV or 1/3 EV increments
+/- 3 EV
in 1/2 EV increments
+/- 2 EV
in 1/3 EV increments
Automatic Exposure Bracketing
3 or 5 shots, +/-2.0 EV (in 1/2 or 1/3 EV steps)
3 shots, (in 1/2 or 1/3 EV steps)
3 shots, (in 1/2 or 1/3 EV steps)
Extended Bracket
Yes,
White Balance, Saturation, Hue, High/Low Key Adj, Contrast, Sharpness
Not Available
Not Available
Expanded
D-Range
Yes,
Highlight Correction: On, Off,
Shadow: High, Medium, Low, Off
Yes,
Highlight Correction: On, Off,
Shadow: High, Medium, Low, Off
Yes,
On, Off
HDR Capture
Yes,
Standard, Strong
Yes,
Standard, Strong
Not Available
Digital Filters
Yes,
8 preset, plus 1 custom
Yes,
15 preset, plus 1 custom
Yes,
12 preset, plus 1 custom
Shutter Speeds,
Frame Rate, Shutter Lag
Shutter Type
Electronically controlled vertical-run focal plane shutter
Electronically controlled vertical-run focal plane shutter
Electronically controlled vertical-run focal plane shutter
Shutter Speed Range
1/8000 ~ 30 sec.,
bulb
1/6000 ~ 30 sec.,
bulb
1/4000 ~ 30 sec.,
bulb
Maximum Frames Per Second / Buffer depth
5.21 fps /
20 large/superfine JPEG frames
4.32 fps /
25 large/superfine JPEG frames
2.92 fps /
6 large/superfine JPEG frames
Shutter lag, full AF (sec.)
0.093
0.097
0.125
Shutter lag, prefocus (sec.)
0.074
0.082
0.105
Startup time (sec.)
0.6
0.6
0.4
Flash
Built-in Flash / Guide Number at ISO 100.
Yes (13 meters / 43 feet)
Yes (11 meters / 36 feet)
Yes (11 meters / 36 feet)
Max flash x-sync speed. (sec.)
1/180
1/180
1/180
Flash Exposure Compensation
-2 to +1 EV, 1/2 or 1/3 EV steps
-2 to +1 EV, 1/2 or 1/3 EV steps
-2 to +1 EV, 1/2 or 1/3 EV steps
Slow-sync Flash
Yes
Yes
Yes
Wireless Support
Yes
Yes
Yes
PC Sync Terminal
Yes
Hot shoe only
Hot shoe only
Playback
System
LCD Size / Pixel Count
3.0 in LCD / 921,600 dots
2.7 in LCD / 230,600 dots
2.7 in LCD / 230,600 dots
Enlarged Playback / Scroll
1.2 - 32x / Yes
1.2 - 16x / Yes
1.2 - 16x / Yes
LCD Monitor Brightness Adjustment Range
15 steps
15 steps
15 steps
LCD Monitor Color Adjustment Range
225 steps
(15 steps each on G-M and B-A axis)
225 steps
(15 steps each on G-M and B-A axis)
225 steps
(15 steps each on G-M and B-A axis)
Automatic Rotation for Vertical Shots
Yes
Yes
No ?
Other Features
Computer Connection
USB 2.0 High-Speed, PTP-compliant
USB 2.0 High-Speed, PTP-compliant
USB 2.0 High-Speed, PTP-compliant
Direct Printing (PictBridge-compliant printers)
No
No
Yes
Menu Languages
20 (English, French, German, Spanish, Portuguese, Italian, Dutch, Danish, Swedish, Finnish, Polish, Czech, Hungarian, Turkish, Greek, Russian, Korean, Traditional/Simplified Chinese, Japanese)
20 (English, French, German, Spanish, Portuguese, Italian, Dutch, Danish, Swedish, Finnish, Polish, Czech, Hungarian, Turkish, Greek, Russian, Korean, Traditional/Simplified Chinese, Japanese)
20 (English, French, German, Spanish, Portuguese, Italian, Dutch, Danish, Swedish, Finnish, Polish, Czech, Hungarian, Turkish, Greek, Russian, Korean, Traditional/Simplified Chinese, Japanese)
Camera Default Reset
Yes
Yes
Yes
Custom Functions (Quantity)
Yes (37)
Yes (22)
Yes (21)
Remote Control
Optional wireless
or wired
Optional wireless
Optional wireless
Info LCD Panel / Illumination
Yes / Yes
No / N/A
No / N/A
Eye-start AF
Not Available
Not Available
Not Available
Ultrasonic CCD dust-removal function
Yes
Yes
Yes
Anti-Shake
(CCD shift)
Yes, improved
Yes
Yes
Live View
Yes
Yes
Not Available
Live View Focusing
Phase-detect, Contrast-detect, Face-Detect, Manual
Phase-detect, Contrast-detect, Face-Detect, Manual
N/A
Multiple Exposure
Yes (2-9 shots)
Yes (2-9 shots)
Not Available
Time-Lapse
Yes (up to 99 shots)
Not Available
Not Available
Electronic Level
Yes
Not Available
Not Available
Composition Adjust
Yes
Not Available
Not Available
Movie Recording
Yes,
1536 x 1024 @ 30fps
1280 x 720 @ 30fps
640 x 417 @ 30fps
Yes,
1280 x 720 @ 24fps
640 x 417 @ 24fps
Not Available
External Mic Jack
Yes,
stereo
Not Available
Not Available
HDMI Output
Yes
Not Available
Not Available
Body Structure
Body Cover/Chassis
Magnesium Alloy / Stainless Steel Chassis
Plastic / Stainless Steel Chassis
Plastic / Stainless Steel Chassis
Dust and Weather Resistant
Yes
No
No
Power System
Battery Compatibility
D-LI90 Lithium-ion
Optional battery grip D-BG4
4 x AA
(Lithium, Alkaline, NiMH)
4 x AA
(Lithium, Alkaline, NiMH)
Rated Shooting Capacity at 20°C/68°F
CIPA standard:
740
CIPA standard:
420
(1900mAh NiMH)
CIPA standard:
640
(2700mAh NiMH)
Dimensions & Weight
Dimensions (WxHxD, mm)
130.5 x 96.5 x 72.5
122.5 x 91.5 x 67.5
122.5 x 91.5 x 67.5
Weight (body only)
670 g / 22.9 oz.
515 g / 18.2 oz.
525 g / 18.5 oz.
Operational
Environment
Operating Temperature Range
-10 ~ 40°C / 14 ~ 104°F
0 ~ 40°C / 32 ~ 104°F
0 ~ 40°C / 32 ~ 104°F
Operating Humidity Range
Not stated
Not stated
Not stated
Kit Lens
Focal length/aperture
N/A
18-55mm
f/3.5-5.6 DA-L

18-55mm
f/3.5-5.6 DA-L

Lens Compatibility
Lens Mount / Compatibility
Pentax KAF2 mount compatible with Pentax KAF3, KAF2, KAF, and KA (K mount, 35mm screwmount, 645/67 med format lenses usable w/ adapter and/or restrictions); SDM function - Yes; Power zoom function: Yes
Pentax KAF mount compatible with Pentax KAF3, KAF2, KAF, and KA (K mount, 35mm screwmount, 645/67 med format lenses usable w/ adapter and/or restrictions); SDM function - Yes; Power zoom function - No
Pentax KAF mount compatible with Pentax KAF3, KAF2, KAF, and KA (K mount, 35mm screwmount, 645/67 med format lenses usable w/ adapter and/or restrictions); SDM function - Yes; Power zoom function - No

 

Pentax K-x

Your purchases support this site

Buy the Pentax K-X
Print the comparison page for the Pentax K-x digital camera reviewPrint this Page

Note: For details, test results, and analysis of the many tests done with this camera, please click on the tabs at the beginning of the review or below.

Follow Imaging Resource

Purchase memory card for Pentax K-x digital camera
Enter this month to win:

1 $300 Adorama Gift Certificate

2 $200 Adorama Gift Certificate

3 $100 Adorama Gift Certificate