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Pentax K-7 Outdoor Crops

15 Megapixels15 MegapixelsSingle Lens ReflexSingle Lens ReflexStabilization: Compensates for tiny involuntary movements of the camera.Stabilization: Compensates for tiny involuntary movements of the camera.Automatic Level: Corrects for some degree of tilt to keep the horizon level.Automatic Level: Corrects for some degree of tilt to keep the horizon level.Continuous DriveContinuous Drive720p HD Video: 1280 x 720 resolution or more but less than 1920 x 1080.720p HD Video: 1280 x 720 resolution or more but less than 1920 x 1080.Manual Controls: Both fully-manual (M) and semi-automatic modes (T and V).Manual Controls: Both fully-manual (M) and semi-automatic modes (T and V).Custom White-Balance: Specifies exactly what should be white to the camera.Custom White-Balance: Specifies exactly what should be white to the camera.Action Photography: Shutter speeds of 1/1500 or more.Action Photography: Shutter speeds of 1/1500 or more.Night Photography: Reaches shutter-speeds longer than 4 seconds.Night Photography: Reaches shutter-speeds longer than 4 seconds.Hotshoe: Allows external flash units to be attached.Hotshoe: Allows external flash units to be attached.Spot MeteringSpot MeteringDepth-Of-Field Preview: Improve perception of DOF before shooting.Depth-Of-Field Preview: Improve perception of DOF before shooting.Weatherproof - Seals protect from dust, humidity and light splashing.Weatherproof - Seals protect from dust, humidity and light splashing.Accepts Secure Digital High Capacity (SDHC) and SD memory.Accepts Secure Digital High Capacity (SDHC) and SD memory.Neocamera detailed reviewNeocamera detailed reviewDiscontinued: No longer produced by the manufacturer. May still be in stock or found used.Discontinued: No longer produced by the manufacturer. May still be in stock or found used.

Outdoor Crops

Here the Pentax K-7 was tested using the Pentax DA* 55mm F1.4 lens. Images below show the performance of the Pentax K-7 in a low-light situation at each ISO sensitivity. These are 100% crops from maximum resolution images taken at night using aperture priority and set ISO sensitivity. Note a fluctuating street light and dropping light levels causes exposure and color to vary between shots.

Night shots are always the most difficult for any digital camera as noise is much more noticeable in dark areas and shadows. Since such scenes consist mostly of dark areas, they represent the worst cases of image noise. We can see that the K-7 performs very well up to ISO 400, image noise is very well controlled which results in highly usable images for large prints. At ISO 800, noise starts to appear but it is nothing to be alarmed with. Maximum print sizes have to be reduced starting at ISO 3200 due to loss of details. ISO 6400 is possibly usable for small prints. All these images are taken with no image noise reduction applied, so they can be improved in software. The Pentax K-7 itself can apply noise reduction too which reduces noise but blurs the image in proportion to the noise reduction. Usually this has no benefit on print sizes because the loss of noise is cancelled out by the loss of details.


ISO 100 - 30s F8

ISO 200 - 20s F8

ISO 400 - 10s F8

ISO 800 - 6s F8

ISO 1600 - 3s F8

ISO 3200 - 2s F8

ISO 6400 - 1s F8
Pentax K-7
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By on 2009/07/27
3

Pentax K-7 Facts

SLR digital camera
15 Megapixels DSLRISO 100-6400
Pentax K Mount
1.5X FLM

Sensor-Size: 24 x 16mm

APS-C Sensor

Actual size when viewed at 100 DPI

Shutter 1/8000-30s
3-Axis Built-in Stabilization, 4-Stop ImprovementFull manual controls, including Manual Focus
100% Coverage
Large Viewfinder
Custom white-balance with 2 axis fine-tuning
Auto Horizon Correction
1 Axis Digital Level
Spot-Metering
Weatherproof down to -10CHot-Shoe & Sync-Port
Built-in Dust ReductionStereo audio input
5.2 FPS Drive, 40 ImagesLithium-Ion Battery
1536x1024 @ 30 FPS Video RecordingSecure Digital High Capacity
3" LCD 920K Pixels
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