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Pentax Optio P70 - Test Shots - ISO Performance

By Cliff Smith


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Over the next few pages we show a range of test shots. On this page the full size image at the minimum and maximum ISO settings have been reduced to let you see the full image, and a series of full resolution crops have taken from original images at a range of ISO settings to show the overall image quality. These ISO test images are shot indoors using reflected natural light for maximum consistency.


This is the full frame at minimum ISO. It is under-exposed slightly due to the limited shutter speed in program mode.


There is a slight haze of noise at 64 ISO, but the overall level of detail is good, and colours are accurate.


Exposure is correct at 100 ISO, and the noise levels are about the same.


Not much difference at 200 ISO.


There is some colour distortion at 400 ISO, but this would still make a good print.


Noise is starting to become a problem at 800 ISO, but overall quality is still pretty good.


Lots of noise now at 1600 ISO, but exposure and colour are still quite good.


3200 ISO is available, but limited to 5MP. Image quality is pretty terrible though.


At 6400 ISO we're into cheap webcam territory.


This is the full frame at 6400 ISO.


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March 17, 2009, 12:29 pm

A good review as always Cliff. I was wondering if you had any plans to review the Samsung WB500 in the next couple of months? I ask as I'm currently set to buy the Cannon Powershot SX110 for my honeymoon around the Med but the Samsung may be a contender if it gets a 'recommended' from you.


April 11, 2009, 4:23 am

OOPS, you've missed out the 2nd most important thing after Picture Quality... two pictures of the user interface. A good optical performance can be rendered useless by features that are buried deep or are not available in 2 seconds when the photo opp occurs. For example, I trust Canon lens quality totally and love their adjustable screen but the interface is terrible, it's impossible to read and hopelessly complex.

Aside from that omission TR remains the very best review site on the planet.

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