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Pentax Optio S45 - Digital Camera

Author	Cliff Smith
Published	2nd Aug 2005
Manufacturer	Pentax
Price	£106.38 (Exc VAT)
as reviewed	£125.00 (Inc VAT)
Latest Price	Click here

Features
Image Quality
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A range of test shots are shown over the next two pages. Here, the full size image has been reduced for bandwidth purposes, and a crop (taken from the original full resolution image at Adobe ImageReady jpg quality 60) follows each image in order for you to gain an appreciation of the overall quality. The next page consists of resized images (to Adobe ImageReady jpg quality 50) so that you can evaluate the overall exposure. For those with a dial-up connection, please be patient while the page downloads.

Showing the maximum zoom range, this shot also shows that even at the telephoto end the lens is not free from distortion.

This shot shows the maximum of the wide end of the zoom range, as well as a lot of lens distortion in the upper right part of the image. Here, the sharpness has fallen quite considerably.

Here the same scene as above has been sequentially captured at increasing ISO sensitivity, and a crop taken from each full size image.

At the minimum sensitivity setting of 50 ISO the image is noise-free and quite sharp.
At 100 ISO there is still no visible image noise and not much evidence of sharpening.
Loss of detail and some noise and colour distortion has crept in at 200 ISO, especially in the darker areas.
At 400 ISO there is a good deal of image noise and detail has been lost, but the image is still just usable.

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