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Canon PowerShot SX1 IS - 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.


This is the full frame at 80 ISO, the minimum setting.


At 80 ISO the image quality is very good, with no visible noise, although there are some red fringes around the bright gold areas.


Already at 100 ISO there is a little noise appearing in the mid-grey areas at the top left of this crop.


At 200 ISO there are a couple of individual "hot pixels" showing, as well as a slight increase in overall noise.


Noise reduction is stating to affect detail and colour fidelity at 400 ISO.


Even more noise at 800 ISO, and image quality is fading fast.


At 1600 ISO the image quality suddenly plunges.


This is the full frame at 1600 ISO.



February 5, 2009, 3:01 am

Yuck! High ISO performance (400 and above) is worse than that of SX10! And we all hoped that SX1's CMOS sensor will be superior to the CCD sensor used in SX10...


February 5, 2009, 3:04 am

Seems like the iso noise is a higher than the sx10, and noise reduction comes into it more, and smudges it all

coupled with the extra 130 quid or so over the sx10, doesnt seem worth it just for the video mode, which most pc's wont manage to play anyhow

Stuart 3

February 10, 2009, 10:46 pm

Has anyone used the SX1 for HDR? The 4 fps should give you 3 bracketted exposures in less than a second. I guess ISO 200 would be max for HDR because of noise. I shoot an EOS D40 at 7 fps for HDR and 90% are keepers, but the kit weighs 3x the SX1.

Cliff can you shed any light on this?

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