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Sony Alpha A700 Digital SLR - Test shots - ISO performance

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.

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/94/9db2eb/4968/5956-SonyA700ISOmin.jpg

This is the full frame at 100 ISO. The A700 has a manual ISO setting range of 100-6400 in 1/3EV steps. I've only shown the full-stop settings here for brevity.

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/94/feb66e/1660/5956-SonyA700ISO100.jpg

On a 13-second exposure at f/16 and 100 ISO. The slight motion blur is actually caused by the organ itself vibrating.

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/94/98e302/91dc/5956-SonyA700ISO200.jpg

6 secs at f/16 and 200 ISO, and still no image noise.

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/94/6c1440/119e/5956-SonyA700ISO400.jpg

3.2 seconds at f/16 and 400ISO. The music had stopped at this point, so the picture is a bit sharper. Still no image noise.

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/94/7bc7a1/d44c/5956-SonyA700ISO800.jpg

1.6 seconds at f/16, 800 ISO. Still no visible noise at this setting.

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/94/b74f0e/b3ce/5956-SonyA700ISO1600.jpg

0.8 sec, f/16, 1600 ISO. There is a faint trace of colour speckling creeping in at this setting, but the image quality is still very high.

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/94/674a34/7578/5956-SonyA700ISO3200.jpg


0.4 sec, f/16, 3200 ISO. There is a little more noise, but you could still get a good A4 print off this.

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/94/daa6cf/357e/5956-SonyA700ISO6400.jpg

1/5th sec, f/16, 6400 ISO. There is significant noise at this setting, and colour rendition has suffered accordingly, but it is still just about usable.

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/94/bd31a4/f70f/5956-SonyA700ISOmax.jpg

This is the full frame at 6400 ISO.

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