Pentax 645D Digital Camera Review

Features
Handling
Performance
ePHOTOzine summary
Specifications

Pentax 645D: Click on the thumbnail for the larger image.

Will Cheung finally got his hands on the Pentax 645D, four years after its first public showing. So far, no decision has been made about UK availability but we are hopeful.

The Pentax 645D was first seen in public at the binannual Photokina photographic exhibition back in 2006 - see our picture below. It was behind glass so the sample could have been fashioned from a block of wood and no-one would have been any the wiser and technical details were sketchy - to put it mildly. At the time, I got the impression that even the Pentax UK people were surprised by its showing. Expected launch date was equally vague and there have been plenty of rumours ever since.

All that's history now because the Pentax 645D was officially announced in March this year and the 645D is due on sale in Japan on June 11.



As I write this, the final decision whether the Pentax 645D will be imported into the UK has yet to be made, so we have no idea of price yet either. Obviously, we will let you know as soon as we know. However, taking the Yen price, 850,000 for the body and 100,000 for the 55mm f/2.8 lens, and doing a straight conversion to Pounds Sterling gives prices of £6420 for the 645D body and £755 for the 55mm f/2.8 lens. If the 645D and 55mm f/2.8 come in at those sort of prices, there could be plenty of interest from professionals and advanced amateurs alike. If those figures are accurate, Pentax would be missing a great opportunity if they decided not to market it in the UK.

Will Cheung enjoys the Pentax 645D's handling and quality feel.

Stephen Sanderson, Pentax UK's product co-ordinator.

Pentax 645D: Features
As you would expect, the Pentax 645D is rich in features and top of the list is its resolution, 40-megapixels using a Kodak-made sensor. Its base ISO is 200 with 1000 being the top speed. This range can be extended to give the equivalent ISO speeds of 100 and 1600. The 645D is the first medium-format DSLR to have a dust removal system. The system vibrates the UV/IR-cut filters in front of the sensor at supersonic speeds to shake loose any dust. 

Despite the large sensor and solid build, the 645D is a portable and quick to use camera. It is also weather-proofed to enhance its appeal to outdoor and location photographers. Existing Pentax 645 owners will be delighted to learn that the 645D is compatible with their lenses.

Pentax 645D: Key features.

Back in 2006, this is what the Pentax 645D looked like under glass.

Pentax 645D: Handling
The 645D feels a lovely camera and it has a specification (as well as a potential price tag) that will appeal to serious enthusiasts as well as professional photographers. Of course, we have no evidence (apart from a couple of big prints on display – and they were impressive) as regards the 645D's image quality but the signs are positive, especially when taken in context of the medium-format digital market where products are generally much more expensive.

The Pentax 645D bears a strong family resemblance to the 645 film camera, a camera I used happily for several years. The digital camera seemed a little bigger on the girth and obviously there is a monitor and all the usual controls you would expect to find on a top-end digital camera.

Picking the 645D I was pleasantly surprised to find it was lighter than I expected, given its size. The ergomically moulded handgrip is excellent with the result that the camera feels great in the hands, and very well balanced too – at least with the new D FA 55mm f/2.8 AL (IF) SDM AW lens. This lens gives a focal length equivalent to 43.5mm in the 35mm full-frame format, so it is very similar to the field of view of the human eye.

As with the old film camera, switching from landscape to portrait-format shooting is no problem at all, and key controls like the shutter button fall naturally to finger.

Partial depression of the shutter release and the camera's AF system kicks in and the image is brought smartly into sharp focus. Focusing speed, accuracy and responsiveness seemed excellent and on a par with Pentax's APS-C format digital SLRs. Focusing is also achieved with little noise. The 11-zone system with nine cross-hair sensors seem very efficient.

A full press of the shutter release and the exposure is made. Despite the large reflex mirror flapping up and down, the noise and vibration levels are impressively low.

Pentax 645D Key features: Click on the thumbnails for larger images.
Design is very clear and the monitor is good.	Buttons are well spaced for easy handling.
All the controls fall nicely to finger.	Exposure mode dial has a lock function.
Big reflex mirror that is light on its feet.	The new 55mm f/2.8 standard lens.

The cameras we played with did not have SD cards on board so factors like write speed, exposure accuracy and so on could not be assessed. However, Pentax claim 13 Raws at the continuous shooting speed of 1.1 frames-per-second until the buffer is full. If that sort of shooting speed is achieved in reality then that is fast enough for most, it not all, of the potential users of this camera.

Control layout is very clear. The key controls like white-balance, exposure compensation, metering modes and ISO are easily accessible. Being a medium-format camera probably helps and the buttons are generously sized and feel positive in use.

A quick word about the menu system. Anyone used to a Pentax K7 or K20D will immediately feel at home with the menu system. Its layout and navigation are basically identical. The large 3inch monitor is also very clear.

It is very, very early days and only 20 minutes with a camera is no time at all, but so far the 645D promises excellent handling.

Pentax 645D: Performance
We were not able to take away any pictures to assess because the sample I tried was not a full production sample. Naturally enough, the two sample pictures that I saw were very impressive.

These are the only twp prints I saw from the Pentax 645D.

DxOMark provides objective, independent, RAW-based image quality performance data for lenses and digital cameras to help you select the best equipment to meet your photographic needs. Visit the DxOMark website for tests performed on the Pentax 645D.

Pentax 645D: Summary
There is not a huge choice if you fancy a medium-format digital SLR and  you need a pretty healthy budget whichever model you go for. The Hasselblad H3DII-50 with a HCD 35-90mm f/4-5.6 lens kit costs around £18K and the Leica S2 comes in around £20K. In that context, the Pentax 645D is certainly price competitive - very, very competitive. In fact, it is competitve on many levels including handling, resolution and system support. Whether its late arrival will harm its chances of success only time will tell, but so far, so good.

Pentax 645D: Pros - provisional

Portable

Quick autofocusing

Handling

Quiet, low vibration shutter action

Bright viewfinder image

Fits the hands well

Weatherproofing

Pentax 645D: Cons - provisional

Only one digital lens right now

SD/SDHC only - why not CompactFlash too.

FEATURES	To be rated
HANDLING	To be rated
PERFORMANCE	To be rated
VALUE	To be rated
OVERALL	To be rated

Pentax 645D: Specifications

Price	£TBC
What comes in the box	TBC
Contact	www.pentax.co.uk
Lens	Pentax-D 55mm f/2.8 AL (IF) SDM AW
Lens mount	Pentax 645AF2 bayonet: 645AF and 645A lenses fit
Resolution	40Mp effective
Sensor size	44x33mm - made by Kodak
Sensor type	CCD
Max. Image size	7264x5440pixels
Aspect ratio	4:3
Crop factor	TBC
Viewfinder	98 per cent field of view, dioptre adjustment
Focusing system	11 point AF (nine cross-type), with select, centre or auto settings
Focus type	TTL phase detection
Focusing modes	AF single, AF continuous, manual
File types	JPEG (three quality levels), Raw (PEF or DNG)
ISO sensitivity	ISO 200-1000 (auto), 100-1600 (boost)
Metering system	TTL open aperture, 77 segments. Program AE, sensitivity priority, aperture-priority, shutter priority, shutter and aperture priority, metered manual
Metering modes	Multi-segment, centre-weighted average, spot
White-balance	Auto, daylight, shade, cloudy, fluorescent, tungsten, flash, three manual settings, colour temperature, CTE - Color Temperature Enhancement mode
Exposure compensation	+/- 5EV
Shutter speed range	30secs-1/4000sec on 1/2 or 1/3 EV steps, flash sync at 1/125sec, B (bulb)
Continuous shooting	High and low, 1.1 frames-per-second
Image stabilisation	None
Movie mode	None
Monitor	3 inch TFT LCD, 921,000 dots
Media type	SD/SDHC
Live View	No
Sensor cleaning	Supersonic vibration (DR II)
Interface	USB 2.0, HDMI Type C mini, video out NTSC/PAL
Power	Rechargeable lithium-ion D-LI90
Size (wxdxl)	156x117x119mm
Weight (with battery)	1400g