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Pentax K-01 Mirrorless CSC Full Review

Pentax K-01 Mirrorless CSC Full Review - The Pentax K-01 is the only mirrorless camera to accept the same lenses as the Pentax K mount Digital SLR series. Joshua Waller finds out how it performs in our full review.

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Category : Mirrorless Interchangeable Lens Camera
Product : Pentax K-01
Price : £520
Rating :
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Pentax K-01 Front
Pentax K-01 Front

The new Pentax K-01 is a brand-new mirrorless camera from Pentax, featuring a 16 megapixel APS-C CMOS sensor and K mount allowing you to use any K mount lens from Pentax. The camera is due to be available to buy in mid to end March, for £629 body only, or £679 with the new compact f/2.8 40mm lens shown. The camera is also available with an 18-55mm kit lens, as well as a 55-200mm zoom lens, the same lenses available with the Pentax K-r and Pentax K-5.

Pentax K-01 Features

Pentax K-01 Front Angle
Pentax K-01 Front Angle

Other features include 6 fps shooting, Full HD video with 30/25/24fps, a microphone socket, HDMI out and a colourful design that will be available in yellow and black, black and silver, or silver. With a white version available in certain markets. The new 40mm lens is said to be the World's smallest interchangeable lens available and was designed specifically for the Pentax K-01.

Pentax K-01 Pop Up Flash
Pentax K-01 Pop Up Flash

Key Features

  • 16 megapixel APS-C Sensor
  • Pentax K-Mount
  • 3inch screen, 921k dots
  • 6fps continuous shooting
  • Sensor-shift Shake Reduction
  • Full HD video, 30/25/24fps
  • Stereo microphone socket
  • ISO100-12800, expandable to 25600
  • SD/SDHC card slot
  • 500 shot battery life

Pentax K-01 Handling

Pentax K-01 Rear
Pentax K-01 Rear

Handling - The camera is surrounded by a rubber grip, apart from the back which is mostly black, or silver on the silver model and there is not a traditional thumb grip on the back of the camera. The memory and IO ports (AV/HDMI) are covered by a rubber cover, and on the very left of the camera (looking from the back) there is a microphone socket for video recording.

Design - The design of the camera is somewhat unique and is most certainly different, being available in a number of colours it certainly provokes a reaction when people see and touch the camera. Once you get used to the design, or learn to live with it, the camera is reasonably comfortable in the hand, although a deeper hand grip and rear thumb grip would help. The metal strap loops are unique and certainly seem very strong, although the camera doesn't feature a sensor plane marking - this seems to be the case on Pentax mirrorless cameras, although can be found on the majority of other mirrorless cameras as well as newer Pentax Digital SLRs.

Pentax K-01 Top
Pentax K-01 Top

Buttons - The two red and green buttons on the top can be customised, with the red button defaulting to record video in any mode. The camera does not feature an electronic viewfinder, but could support an optical viewfinder in the flash hot shoe. The cameras screen is used for live view and focusing appeared reasonably quick, although not as quick as the quickest mirrorless cameras available.

Pentax K-01 Front Sensor
Pentax K-01 Sensor

The Pentax K-01 can be held easily with one hand but the position of the mode dial is a little bit of a stretch for your hand. The rest of the controls on the back of the camera can be used easily with one hand and they are clearly labelled.

Menus - The Pentax K-01 has the same menu system as the Pentax Digital SLRs, as well as a control panel that can be accessed on the back of the screen by pressing the info button. It's also possible to turn the screen off. The screen is quite sharp and bright with good colour and viewing angles. Outdoors it is quite good, but bright sunlight can make it difficult to see the screen.

Pentax K-01 Bottom Battery
Pentax K-01 bottom, battery and side ports

Battery Life - The battery is a large Digital SLR sized battery with a rating of 1860mAh, so should offer good battery life and has a CIPA rating of 500 shots. We were able to take over 400 shots with the battery showing plenty of life left.

Speed - We tested each camera's performance at focusing, shutter response, shot-to-shot time, continuous shooting etc. and have posted the results below. To test this we took 6 or more shots and calculated the average, so that consistent results were produced.

  Pentax K-01 Sony NEX-7
Shutter Response 0.1 <0.05
Wide - Focus / Shutter Response x 0.2
40mm - Focus / Shutter Response 0.6 x
Full zoom - Focus / Shutter Response x 0.2
Switch on Time to Taking a Photo 1.9 1.1
Shot to Shot (without flash) 1.7 0.6
Shot to Shot with Flash 1.7 0.7
Continuous Shooting (JPEG) 6fps (6 shots before slowdown) 10fps (18 shots)
Continuous Shooting (with Flash) 2fps (12 shots only) 0.6 (2 shots)
Continuous Shooting (RAW) 1fps (9 shots before slowdown) 10fps (14 shots)

Instant review was switched off, as was the start up screen, focus was set to centre spot. Focus speed is certainly slower than other mirrorless cameras, although is quick enough in most situations. Continuous shooting (High / Low) the screen blacks out, and it's only when shooting JPEG images that you can use the 6fps shooting mode, switching on RAW slows the camera to 1fps shooting.

Pentax K-01 Performance

We've taken a number of sample photos in a variety of situations, both in our studios and outdoors. Further sample photos are available in the to Equipment Database, where you can also add your own reviews and ratings.

Pentax K-01 Sample Photos

Sample photos - The camera produces pleasing images with bright saturated colours and good levels of detail. Photos with flash show very little or no red-eye, although some purple fringing was noticed in the reflection from the flash.

Pentax K-01 Lens test images

Lens test photos - The 40mm f/2.8 pancake lens performs well in a variety of situations with little flare even when shooting with the sun in the frame. Very little chromatic abberation was noticeable in the shot of the trees or the majority of other photos.

Pentax K-01 ISO test images

ISO Noise Performance - The camera has a default ISO range of ISO100 to ISO12800, with ISO25600 available if you enable it in the custom options menu. ISO100 and 200 show very low levels of noise. At ISO400 noise is low, with a very slight increase in noise in darker colours, if you view images at 100%. ISO800 shows another increase in noise, but the levels are still low. At ISO1600 noise increases again and becomes more noticeable and there is a slight decrease in detail. At ISO3200 noise is stronger and the decrease in detail is more noticeable. Again at ISO6400 noise increases as detail decreases, although images are still usable. It's not until ISO12800 that noise becomes a bigger issue and it's at this setting that you might decide you need to resize, convert to black and white or apply further noise reduction manually. ISO25600 shows the highest levels of noise and you may find this setting best avoided depending on your needs.

Pentax K-01 White-balance test images

White Balance Performance - Auto white balance (AWB) under tungsten light leaves a warm cast, and using the tungsten preset gives a much better result. There is the option to increase the strength of AWB under tungsten lighting, in this shot subtle correction used, strong correction is also an option. AWB under fluorescent lighting gives a yellow/green cast and the fluorescent preset gives a magenta cast. Colours are brightly saturated.

Pentax K-01 Digital filters

Digital Filters - HDR takes three shots and merges these in camera, however the shot-to-shot time seemed quite slow as it didn't seem possible to use this feature handheld without some ghosting appearing in the final image. The digital filters available are shown above, with each one offering a number of customisation options. As well as this there are a number of scene modes and colour options. The camera doesn't feature a built in panoramic mode.

Video Sample - Video options include full HD, at 30/25/24fps selectable. Shake Reduction is enabled while recording and videos appeared very smooth. You can manually adjust the internal microphone level, as well as the extenal microphone level.

Value For Money

The price of £629 body only prices it above entry level Digital SLR cameras, but put it in the middle of the pack with regards to other mirrorless cameras and one would expect the price to drop over time. The K-01 is available for £679 with the 40mm pancake or the 18-55mm kit lens. Alternatives you could look at include the Pentax K-r (£399), Pentax K-5 (£699) or from the mirrorless / compact system camera market, the Panasonic Lumix GX1, Olympus PEN E-PL3, Sony NEX-5N, Samsung NX200, Nikon 1 J1 are all competitors available for around the same price, with some costing noticeably less, although only the Sony and Samsung cameras have APS-C sized sensors, with the others featuring smaller sensors.

Pentax K-01 Verdict

The Pentax K-01 is a bold new camera from Pentax and is certainly different to anything else made by anyone else - and perhaps that's what Marc Newson and Pentax intended with the design of this new camera. It's also the first mirrorless camera ever to use a full Digital SLR lens mount, supporting existing Digital SLR lenses. This causes the camera size to be larger than most other mirrorless cameras as the distance from the sensor to the lens has to be the same as that of a traditional DSLR camera, although the new 40mm f/2.8 lens certainly helps reduce the size. The design of the camera certainly seemed to divide opinion when it was revealed and it still creates a reaction when used.

If you look beyond the design, the camera is easy to use, has a large number of options and controls and importantly is capable of producing high quality images with strong colour, good detail and low noise levels. If you have a large range of Pentax K mount lenses then the Pentax K-01 could be a good way to get the most from them, without having to buy the Pentax K-5, although if you shoot RAW you may find the camera's speed a little disappointing. The price of the camera is very similar to the K-5 price and the K-01 isn't massively smaller than the Pentax K-r, which has the benefit of an optical viewfinder and a much lower price. So while this camera does take great photos, the handling could be much better and for value for money the Pentax K-5 with optical viewfinder definitely scores very highly. If however, you can wait, then perhaps the next version of this camera will be more traditionally styled if you're not a fan of the design.
  The Pentax K-01 has advanced features and excellent noise performance.

Pentax K-01 Pros

Excellent colour
Good detail
Low noise at high ISO settings
Access to all K-mount lenses
Good battery life
Microphone socket
40mm f/2.8 pancake lens is extremely small
6fps continuous shooting (JPEG only)

Pentax K-01 Cons

1fps continuous shooting in RAW
Rubber ports cover difficult to close
Handling could be better
Not much smaller than the Pentax K-r


Additional sample photos and photos of the Pentax K-01 compared to a Pentax Digital SLR can be viewed on Pentax User.

Pentax K-01 Specifications

Image Sensor
Pixels16.28Mp (Megapixels)
Pixels (W)4928
Pixels (H)3264
Sensor TypeCMOS
Sensor SizeAPS-C
Sensor Size (width)23.7mm
Sensor Size (height)15.7mm
Aspect Ratio
  • 4:3
  • 3:2
  • 16:9
  • 1:1
LCD Monitor
LCD Monitor3in
Screen resolution921k
Touch ScreenNo
Focusing modes
  • Autofocus
  • Manual
  • Spot
  • Face Detection
  • AF Tracking
  • Multi
  • Centre
Exposure Control
Shutter speeds shortest1/4000sec
Shutter speeds longest30sec
Exp modes
  • Program
  • Aperture-Priority
  • Shutter-Priority
  • Manual
  • Scene modes
  • Program Variable
  • Centre-weighted - Average
  • Multi Pattern
  • Spot
ISO sensitivity100 - 25600
White balance
  • Auto
  • Manual
  • Outdoors/Daylight
  • Cloudy
  • Incandescent
  • Fluorescent
  • Shade
  • Flash
Exposure Comp+/-2
Viewfinder ResolutionNo Data
Shooting Options
Continuous shooting6fps
Movie modeYes
Video Resolution
  • 1920x1080
  • 1280x720 720p
  • 640x480 VGA
Video FPS30/25/24 fps
Stereo SoundYes
Optical Zoom with VideoYes
Other Features
Image StabilisationYes
Card Type
  • SD
  • SDHC
  • SDXC
File Type
  • RAW
  • JPG
  • RAW + JPG
Power Source
Battery TypeLithium Ion
CIPA Rating500
Box Contents
Box ContentsLi-ion battery D-LI90, AC plug cord D-CO2E, USB cable, Battery charger D-BC90, Strap, hot shoe cover, body mount cover, Software

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Photographs taken using the Pentax K-01

Wasp Spidereye in eye with a wasp spider (Argiope bruennichi)Beetle in mossStaircase to heavenCockchafer close upStormy IslandStormyLittle PredatorThe hairy eye of a beeMason Cash at the BeachConisbrough Viaduct : Don GorgeGood Morning LipsBullet after ImpactWaterfall : TintagelMineral Pyrite
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23 Mar 2012 5:16PM
Sensor plane marking was mentioned in the review. The K-5 has a sensor plane mark, but the K20D does not. I'm not sure about the others.

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mugund 3
23 Mar 2012 5:30PM
Shot-shot time with flash On and flash off looks same. Is this possible or is it a typo? Please update...

kodachrome 3 539
23 Mar 2012 6:39PM
Good review and what I would expect from the latest Pentax technology, however, Its way too expensive for a APS-C mirrorless camera with out a EVF. An EVF would have been the icing on the cake and would have possibly reduced the negative responses that we have seen.

I just wonder now what's in the pipe line for a KR & K5 replacement.

joshwa Plus
4 751 United Kingdom
23 Mar 2012 8:11PM

Quote:Shot-shot time with flash On and flash off looks same. Is this possible or is it a typo? Please update...


Yes, it was the same. Shot to shot is fairly slow compared to many other mirrorless / DSLR cameras, so it's entirely possible for shot to shot with flash to be the same.
joshwa Plus
4 751 United Kingdom
23 Mar 2012 8:12PM

Quote:Sensor plane marking was mentioned in the review. The K-5 has a sensor plane mark, but the K20D does not. I'm not sure about the others.

Thanks for the info, we checked a few, but mostly older models (and the Pentax Q). I'll update that section.
joshwa Plus
4 751 United Kingdom
23 Mar 2012 8:24PM
The sensor plane marking is on the: K-5, K-7, but not the K-x, K-r, K-m, K200D, K20D, *ist D (or Q, or K-01). Perhaps it is deemed unnecessary on entry level models?
franken Plus
12 3.6k 4 Wales
24 Mar 2012 9:03AM
As it doesn't have a viewfinder what's it like when composing images etc in bright sunshine?

frenchie44 9 302 United Kingdom
25 Mar 2012 1:50PM
this where a unique design comes before function and looks. it reminds me of the plastic cameras of the 60/70'S mainly an Instamatic with extra buttons, itg to be the ugliest camera to date.
joshwa Plus
4 751 United Kingdom
26 Mar 2012 10:19AM

Quote:As it doesn't have a viewfinder what's it like when composing images etc in bright sunshine?


Outdoors it is quite good, but bright sunlight can make it difficult to see the screen. I've seen worse screens definitely.
franken Plus
12 3.6k 4 Wales
26 Mar 2012 5:24PM

517 3 Hong Kong
27 Mar 2012 2:16PM
Can use Leica M-lens later ?
28 Mar 2012 3:54PM
In my opinion it is a good camera... And lens too.
Can you make more precise, can user limit the maximal ISO level and minimal shoting time when auto ISO level is set?
solar1 6
28 Mar 2012 4:59PM
IIRC, 60 fps is available in 720p video mode. Might wish to update this if correct. thanks.

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