Sony Alpha A700 Digital SLR Review - Test shots – ISO performance Review

”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 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.


—-


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


—-


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


—-


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.


—-


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


—-


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.


—-


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


—-


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.


—-


This is the full frame at 6400 ISO.


—-

Unlike other sites, we thoroughly test every product we review. We use industry standard tests in order to compare features properly. We’ll always tell you what we find. We never, ever accept money to review a product. Tell us what you think - send your emails to the Editor.