On Wed, Apr 28, 2010 at 11:30 AM, paul stenquist <[email protected]> wrote:
> K7 exposure is far more accurate than the K20's, the dynamic range seems > about a stop better, and noise is improved as well. The deer pics I showed > the other day were ISO 800. My pic in the PDML annual is at ISO 3200. I got > decent results at the pool tournament shooting 6400. K7 noise level isn't as > good as Kx, but it's somewhat better than K20. > Paul > PS: When you first got your K7, you noted all these improvements and praised > the k7 effusively. If I had time I'd look it up in the archive. So I suspect > you're just being argumentative now. Of course you wouldn't do that:-)). Not to be argumentative but exposure is not a function of the sensor. The three main things you judge a sensor on are: Color Depth (or Color Sensitivity) which indicates both the breadth of the color spectrum and the degree of fine separation between colors that a camera can distinguish. The higher the color sensitivity, the more color nuances can be distinguished. The other two Paul correctly points out are: Dynamic Range: the greatest possible amplitude between light and dark details a given sensor can record and Low Light ISO performance: indicating the highest ISO sensitivity to which your camera can be set while maintaining a high quality, low-noise image All of the above parameters must be based on an evaluation of the RAW file. The last is resolution, which is basically megapixels. What the camera does with the raw information from the sensor is a whole different subject... but the discussion here seems to be on the merits of the sensors themselves. Dx0Mark Sensor is a great way to compare the various Pentax DSLR sensors, judged on the same level playing field. http://www.dxomark.com/index.php/eng/DxOMark-Sensor The K-x is far and away the winner in High ISO capability. The K-x is also the clear winner in Dynamic Range 12.5 EVs compared to the 2nd place K10D with 11.6 EVs. (The K20D is in 4th place with 11.1 EVs). Color Depth is a photo finish (pardon the pun) with the K20D at 22.9 bits to the K-x score of 22.8 and the K10D coming in with 22.7 bits. In overall (combined) scoring, Dx0Mark gives the K-x a commanding 71.9 score to the 2nd place K10D's 65.9. The K20D is next with 65.4 and the K200D at 65.2. Darren Addy Kearney, NE -- "The camera is an instrument that teaches people how to see without a camera." ~ Dorothea Lange "98% of all cameras and lenses are sharper than 99% of all photographers." ~ Anonymous -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
