Feeds
90%
Pentax 645D

Pentax 645D medium format digital camera

The 40Mp field worker

  • alert
  • submit to reddit

Internet Security Threat Report 2014

Timed exposure

While both the autofocus proved responsive and the metering precise – delivering perfectly exposed pictures without need for manual adjustments – the processing speed proved disappointing. The continuous shooting speed is 1.1 frame per second, but the real blow is the painstaking eight seconds the camera takes to write down the files on the memory card and the six or more seconds it takes to display them on the screen.

Pentax 645D

New lenses are rumoured soon, but the 55mm prime is the only calibrated model currently available

Moreover, the latter can arbitrarily increase to tens of seconds for no obvious reason. As annoying as this is it does not actually affect the camera’s ability to keep shooting, as data writing runs in the background without locking up the camera.

The Pentax 645D image quality is every bit what you’d expect from a medium format camera and maybe more. Pictures are pin sharp and show off beautifully rich textures and exceptional colour gradation. Compared to professional DSLRs, the 645D renders much better detail and smoother tonal transition.

Dynamic range is also terrific, with fine detail in both shadows and highlights. The camera offers a Dynamic-Range Expansion option that increases the natural range to maximise detail in critical areas, but it is seldom needed. Other cool features include a lens correction function to compensate for chromatic aberration and barrel distortion. There’s also pixel mapping that detects and shows defective pixels on screen and a good range of custom image modes like the Vintage Reversal Film, that mimics the high saturation and fashionable characteristics of transparencies.

The 645D has a native ISO range from 200 to 1000 but it can be extended to cover 100 to 1600 ISO. The camera handles noise superbly. Not only because it shows a very minimum amount of noise, at even the highest ISO, but mostly because the quality of its noise is aesthetically far more pleasing and usable than most. At top ISO speeds noise is there but there is very little chromatic noise, and image deterioration only occurs in increased grain, which has the typical soft gritty look of high speed films, as opposed to the odious purple and green specs of high speed digital capture.

The one significant weakness of this camera is its lens range. There is not much use in reaching these peaks of resolution if you don’t produce lenses that deliver that pixel power consistently across the sensor. That’s the reason why leading medium format manufacturers invest equally in both camera bodies and quality lens systems that are carefully calibrated for high-standard digital capture.

Pentax 645D

Internet Security Threat Report 2014

Next page: Glass half full?

More from The Register

next story
Oi, Tim Cook. Apple Watch. I DARE you to tell me, IN PERSON, that it's secure
State attorney demands Apple CEO bows the knee to him
Phones 4u website DIES as wounded mobe retailer struggles to stay above water
Founder blames 'ruthless network partners' for implosion
Will BlackBerry make a comeback with its SQUARE smartphones?
Plus PC PIMs from company formerly known as RIM
Apple's iPhone 6 first-day sales are MEANINGLESS, mutters analyst
Big weekend queues only represent fruity firm's supply
Hey, Mac fanbois. HGST wants you drooling over its HUGE desktop RACK
What vast digital media repository could possibly need 64 TERABYTES?
Soundbites: News in brief from the Wi-Fi audiophile files
DTS and Sonos sing out but not off the same hymnsheet
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
Saudi Petroleum chooses Tegile storage solution
A storage solution that addresses company growth and performance for business-critical applications of caseware archive and search along with other key operational systems.
WIN a very cool portable ZX Spectrum
Win a one-off portable Spectrum built by legendary hardware hacker Ben Heck
The next step in data security
With recent increased privacy concerns and computers becoming more powerful, the chance of hackers being able to crack smaller-sized RSA keys increases.