Canon PowerShot S90 10MP Digital Camera Review

I bought this camera on 10/9, which is the first day it was available here in Kansas City. I have already taken a couple hundred shots with it comparing images side by side with my G10 at various settings. This review is of my initial impression based on the short time that I have had it. I was anxiously awaiting the release of this camera. I own a Nikon D90 DSLR, but there are many times when I prefer to just take a compact. In the past the Canon G10 has served that purpose, but the S90 boasts improved low-light performance and smaller size.

The first thing I wanted to test was image quality and noise at high ISO settings. Most photography hobbyists and pros know that low light performance is the number one factor influencing camera and lens prices. This is the main reason an f/2.8 zoom lens costs 3-5 times as much as an f/3.5-5.6 zoom. The S90 performs superbly in this regard. RAW images from the S90 set at ISO 800 were equal to or better than RAW images from the G10 set at ISO400. Both luminance and chrominance noise were lower in the S90 images. This represents a 1 stop improvement, which is what I was hoping for. These comparisons were made with all noise reduction disabled in camera and in the DPP software. I tested all other ISOs and found the S90 to be better at all ISO settings above 100 and the 2 cameras demonstrated equal IQ at the base ISOs of 80 and 100.

Canon also boasts about the S90 having a faster f/2.0 lens compared to the f/2.8 on the G10, but this part of the camera did not impress me. The lens only has the 1 stop advantage at the absolute widest setting and the max aperture closes down fast from there. The G10/G11 lens is faster at the telephoto end and the difference is negligible at all zoom settings in between. Both lenses are equally sharp throughout their zoom ranges.

The ergonomics of the camera will take me a while to get used to. I was looking for a smaller camera and the S90 definitely fits the bill. But now that I am using it, I wonder if it might be too small. I hope that it will become more comfortable in my hands as I get used to it. On the G10, I could operate all of the controls on the right-rear of the camera with the thumb of the hand holding the camera. With the S90 there are fewer controls that I can operate one-handed and at times I feel like I might drop this camera, because I just can't get a good grip on it. Other ergonomic concerns are that the rear control ring turns too easily and I have found myself unintentionally adjusting settings because of this, which was never a problem on the G10. I think I might miss the external ISO and Exposure Compensation dials on the G10, but I have set the front control ring to adjust the ISO setting and I would honestly need to use it more before I say the controls are not easy to access; again this should improve with more use. None of the concerns I have about the size and controls on the camera would dissuade me from the purchase; the trade-off is worth it for the smaller carrying size and improved performance.

The camera ships with a newer version (3.7) of Canon's Digital Photo Professional software. There is not much difference compared to older versions, but there is one nice improvement: the lens aberration section is enabled for images taken with the S90. This allows for correction of vignetting, CA and distortion. I do not understand why the same controls are not available for RAW files taken with the G10. There is still no straighten function in the software, which is a disappointment. Another disappointing factor about the software is that Canon has not yet released a new RAW Codec; the current version (1.5) does not support the S90 or G11. This allows raw files to be viewed in Windows and for thumbnail images to be created in Windows explorer. I am sure they are working on an update, but I wish they had this ready by the time the camera was released.

I went step-by-step through the menus and features of both cameras during my comparison and most functions are very similar. The S90 has fewer AF options and no remote control, but I do not think I will miss either of these.

I considered giving this camera only 4 stars because of the couple of hits I mentioned above, but then decided that would not be fair. The title of "Best Compact" has been debated feverishly on the web, with most votes going to the G10 and LX3. But now, I think Canon's new release of both the S90 and G11 will put a quick end to these debates. There is no question in my mind that this pair sits above all competitors. Therefore a five star rating is the only logical choice. I highly recommend this camera.

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