Olympus C-40 Zoom (D-40 Zoom) Review
The C-40Z's flash unit has a specified range of 0.8 - 3 m at wide angle and 0.25 - 1.75 m at telephoto. It performed relatively well, good power for a small unit but the camera did tend to overcompensate to keep skin tones warm, some flash images had a definite red cast.
Night exposures / Noise reduction
The C-40Z employs what appears to be a very effective noise reduction system for long exposures, this system works by taking a second 'dark frame' shot after the initial exposure, it uses this dark frame to subtract stuck pixels from the image. The Olympus algorithm does seem to be fairly sophisticated, it produces very clean, noise free images with no visible 'black pits'. With noise reduction enabled the C-40Z is more than capable of taking night exposures of up to 16 seconds without visible noise.
|16 sec, Noise reduction Off||16 sec, Noise reduction On|
Barrel and Pincushion Distortion
The C-40Z's tiny lens performs very well from a distortion respect. It has the 'compact camera average' 1% barrel distortion at wide angle and no measurable pincushion at full telephoto.
|Barrel Distortion, 1.0% @ wide angle||Pincushion Distortion, 0% @ telephoto|
Purple Fringing (Chromatic Aberrations)
Uh oh. Well yes, the C-40Z does suffer from chromatic aberrations. And that's a shame because a camera which is otherwise capable can so easily end up with a tainted reputation thanks to CA's. It didn't take long to find examples of chromatic aberrations in nice sunlit or strongly backlit images, our standard chromatic aberration test shot confirmed this.
|Hard pressed to find evidence of chromatic aberrations in "every day" shots|
|Our now standard chromatic aberration test shot|
Overall Image Quality / Specific Issues
Generally speaking the C-40Z did well, clean images with very little visible noise, good metering, relatively good dynamic range and vivid colour balance. There were chromatic aberrations and some trouble with moiré (below), you'd have to decide if these are major issues to you. Of the good images my argument would be with Olympus's image processing algorithms and aggressive sharpening, these can of course be tweaked in-camera but I feel it would have been better to leave the defaults fairly neutral. But once more, thanks to the availability of good control over saturation, contrast and sharpening a little tuning can provide you with your optimum 'look'.
The C-40Z did suffer from a strange moiré artifact which only appeared on the 'edge' of a bright highlight (normally chrome or glass edge). As you can see in the examples below this artifact is visible as a yellow or magenta glow or cast around or along the highlight area. The reason we know it's associated with moiré is that its colour matches the moiré seen on our resolution chart shots (later in this review). These artifacts do unfortunately appear to be an Olympus trait, we last saw them on the C-700UZ.
The C-40Z also exhibited diagonal jaggies, something we first observed on the Canon G2. This phenomenon can be seen in lines which are near to 45 degrees which are 'made up of' several joined 45 degree lines. You can clearly see this in the seam running down the center of the indicator stalk in the 100% crop below (here you can also see fringing and chromatic aberrations).
|Autumn by valenttin|
from Harvest Festivals
|Cardinal, Male by paul katinas|
from A Big Year - birds
|.. by Amar Vignesh|
from Unintentional Blur
|Freeze Time by WhistlerOne|
|Sir Mick Jagger by HetFotoAtelier|
from - Concerts : When The Lights Come On -
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