6.827 X 10.24 at the optimal 300 dpi. by my math (which varies depending on caffeine intake).
Just my opinion, hope it helps.
cheers,
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Resolution for printing is a controversial topic, and you will get differing opinions. The 300 ppi figure is often quoted, but as you can see, the print at that resolution is only 6.8 inches wide. In practice, you can get very good 8 by 10 inch prints from a 6 MP camera and 13 inch wide prints on wide carriage inkjet printers such as the Epson 2200 are often very nice. For a 12 by 18 inch print that would be 167 ppi.
The following recommendations are from the late Bruce Fraser's
Real World Sharpening with PSCS2.For continuous tone (contone) printers such as the Fuji Frontier (used at many Walgreen's and Wal Marts) it is usually best to print the image at the device's native resolution, which is 300 ppi in the case of the Frontier. If you make 4 by 6 inch prints, it is important to sharpen after downsizing or else the sharpening halos will be downsized out of existence. For larger prints, you would have to res up to 300 ppi. With older versions of Photoshop, many gurus recommended upresing in multiple steps for optimum results, but this is no longer necessary with the resampling algorithms in the current version of Photoshop. Some photographers use special upresing software such as Genuine Fractals, but opinions are mixed on how much this accomplishes. Many contone printers such as the Lightjet have sophisticated algorithms that can do the upresing for you.
Native resolution is more difficult to determine for inkjet printers, which place dots of ink at seemingly random patterns (error diffusion dithering). The native resolution here refers to the addressable resolution of the device and often is quoted as some ridiculously high figure (such as 720 * 2280 dpi).
Bruce says that the native resolutions of Epson and HP printers are 360 and 300 dpi by conventional wisdom. He says that sending up to 480 ppi (suitably sharpened) to the Epsons can have a small but useful advantage. Bruce suggested that he usually printed at native capture resolution of the camera without bothering to resample. Other gurus say that optimum results are obtained at even multiples of the printer's native resolution (e.g 180, 360, 720 dpi for the Epsons), but Bruce says that with most real world pictures (rather than images of line pairs on a resolution chart) the difference is minimal.
Bill
