Compared to the Nikon Coolpix A
Basic specifications
Although the headline specifications are the same (28mm equivalent, F2.8 lenses, 16MP APS-C sensors without anti-aliasing filters), there are a reasonable number of differences between the GR and Nikon's Coolpix A.
| Ricoh GR | Nikon Coolpix A | |
|---|---|---|
| Lens design | 7 elements, 5 groups 2 aspherical elements |
7 elements, 5 groups |
| Aperture blades | 9 | 7 |
| Minimum focus distance | 10cm / 3.9" | 10cm / 3.9" |
| Rear LCD resolution | 1.2m dots (VGA, RGBW) | 910k dots (VGA, RGB) |
| Battery life (CIPA) | 290 shots | 230 shots |
| Weight (with battery and card) | 245g / 8.6oz | 299g / 10.5oz |
| Movie options | 1080/30p,25p,24p | 1080/30p,25p,24p |
| Movie exposure set before shooting? | No | Yes |
| Exposure control during movie shooting | None | Exposure Comp. |
| Flash Gn (m/ISO 100) | 5.4 | 6 |
| Built-in ND filter? | Yes | No |
| In-camera Raw processing? | Yes | Yes |
The biggest difference, of course, is their interfaces - the Coolpix clusters most of its features in a single interactive control panel, requiring a lot of button pressing to navigate, the Ricoh, by contrast, lets you choose the five features you're most likely to want to change and puts them in an easily accessible place. Of course, if you regularly use more functions than you can assign to these positions (and the three customizable buttons), the Nikon might prove faster to use, overall.
Sigma's DP1 Merrill also deserves a mention at this point - it also has a 28mm equivalent, F2.8 lens in front of an APS-C sensor. However, instead of using a conventional Bayer design, it has one of the company's Foveon sensors that works in a completely different way. The Foveon uses a three-layer design that attempts to collect all its color information at each of its pixels, rather than only capturing Red, Green or Blue at each pixel, then attempting to calculate what the other colors would have been.
The advantage of such a design is that it shouldn't suffer from color moiré that we might expect of these other two models. The disadvantage is that the sensor only works well in relatively bright light, as you'll see in our studio comparison images.
Camera size
Initial image quality comparison
Here we've shot our forthcoming test scene, which shows more useful information about corner performance than our current studio scene. We've shot the Ricoh GR, Nikon Coolpix A and the directly comparable Sigma DP1 Merrill alongside one another.
The shots from the first two cameras have been processed from Raw in Adobe Camera Raw 7.4. The two shots have been white balanced and brightness matched and both noise reduction and sharpening minimized. Our standard unsharp mask sharpening (Amount 100%, radius 0.6, threshold 0) has then been applied in Photoshop an the results saved as quality 11 JPEGs for download.
The process for the Sigma was similar but with the use of the bundled Sigma Photo Pro software, as Adobe Camera Raw doesn't support the camera. Again sharpening was minimized with an unsharp mask applied in Photoshop.
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| Ricoh GR - F2.8 | 100% Crop - Top left corner |
|---|---|
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| Nikon Coolpix A - F2.8 | 100% Crop - Top left corner |
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| Sigma DP1 Merrill - F2.8 | 100% Crop - Top left corner |
Moiré
These crops were taken from elsewhere in the image. As you can see - both cameras are exhibiting extensive moiré as a result of their sharp lenses and lack of anti-aliasing filters.
This is exactly what the Sigma's Foveon chip excells at - because it is gathering information about red, green and blue at every pixel, it doesn't suffer from color moiré.
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| Ricoh GR - F2.8, 100% center crop |
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| Nikon Coolpix A - F2.8, 100% center crop |
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| Sigma DP1 Merrill - F2.8, 100% center crop |



















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