Pentax’s first ‘pro-sumer’ DSLR, the K-7, is compact, weatherproof and has a host of novel features, including a self-levelling sensor. Find out in the Pentax K-7 review whether these qualities make it attractive to out-and-about enthusiasts

Product Overview

Overall rating:

Pentax K-7

Build/Handling:
Autofocus:
Noise/resolution:
Metering:
Features:
AWB Colour:
LCD viewfinder:
Dynamic Range:

Product:

Pentax K-7 review

Manufacturer:

Price as reviewed:

£1,190.00

Latest deal

Loading
TAGS:

Dynamic range

The two dynamic range (D-Range) optimisation controls on the K-7 are Highlight Correction and Shadow Correction. When the Highlight Correction option is selected, the lowest available sensitivity setting is raised from ISO 100 to ISO 200. This allows the camera to underexpose to preserve the highlights.

Interestingly, when using this system, it is often possible to give images more than one stop of extra exposure and still not burn out the highlights. This allows the midtones and shadows to be brightened while keeping 
the highlights. Our lab tests measured the K-7’s default dynamic range at 12.2EV.

However, switching on the highlight correction sees it drop to 10.4EV because 
of its impact on the darker tones. Setting 
the shadow correction to the highest of its three settings brightens images and boosts the effective range to 12.5EV.

This graph shows the brightness values recorded by the test camera when it is used to photograph a stepped graduation wedge. The wedge has transmission values in 1⁄2EV steps ranging from 0 to 12EV. The camera’s exposure is set so the 12EV section in the wedge has a brightness value of 255. Software analysis of the image then determines the recorded brightness values of all the other steps and calculates the camera’s dynamic range.

Pentax K-7 Gamut



This graphic indicates that when set to the Adobe RGB colour space and its Bright Image Tone, the K-7 produces JPEG images that almost cover the sRGB gamut and most of the Adobe RGB space. As we often find, the greens of the Adobe RGB space are the biggest challenge, though purple, red and yellow are reproduced
.

  1. 1. Pentax K-7 at a glance:
  2. 2. Features
  3. 3. Build and handling
  4. 4. White balance and colour
  5. 5. Metering
  6. 6. Autofocus
  7. 7. Resolution, noise and sensitivity
  8. 8. Dynamic range
  9. 9. Viewfinder, LCD, live view and video
  10. 10. The competition
  11. 11. Our verdict
Page 8 of 11 - Show Full List
  • Roberta

    Well Carl,There are many readers inlducing myself that look forward to what you write ..Your right on with the DP1, the more I use it, the more I love it and depend on it. Pushing to 1600-3200 is easy and still provides great images .Waiting on your next project .take care Don

  • Emrullah

    Sorry but I disagree with the whole coecnpt of women in combat, the same as in the cops. Ken, Grams & I saw you blow thru the obstacle course. The women were allowed to run around the cinderblock fence and avoid any other parts that were like the tire jumping part. Legs were too short. Also, they must be given Days off when they are PMSing or some other female peculiar ailment. I doubt the Iraqis are carrying around MIDAL just in case . They demand equality then yell for special treatament because I am a woman and can’t deal with it.Be really fair, democratic etc . let Nancy Pelosi & Harry Reid lead the first charge and develop a draft for women . You would see how quickly the baby must have its mother’s milk pumping. Just out of bullet range and heaven help the Major who ordered the Mom to hang the baby in her backpack ready for next feeding.. If they want to fight, neuter them first.I have a REAL problem with minorities getting promoted ahead of better qualified and deserving to pay the quoto debt.Don’t get me started. We have lost a lot of excellent men in our peacekeeping effort for no real good reason. Should have sent some whiney women instread.