Pentax K-7: Hands-On Preview
雖然和K20D的CMOS一樣畫素, 但K-7的Sensor好像做了不少的改變啊...
Importantly, the K-7 has a completely redesigned 14.6MP CMOS sensor (23.4mm x 15.6mm) and PRIME II processing engine. This affects so many different areas, it's easy to see why Pentax is so pleased with the result, even though there really isn't a big boost in megapixels over the K20D. Chris explained to me that the agenda by Pentax's design team was to increase memory bandwidth potential (now capable of writing 1GB/sec) and the efficiency of the 4 color channels so that highly detailed and color accurate images get processed more quickly. Case in point? The camera can now comfortably write 5.6FPS in RAW mode. However, there were other significant benefits: the White Balance now uses native color sensing for increased accuracy in Auto WB mode (indoor WB and mixed light colors aren't the problem they used to be), and there's less sensor noise (the new sensor limits "electron creep" because its tiny switch gates aren't as grossly affected by leaks as the older sensors). While the engineering sample we looked at wasn't a final shipping model, it was obvious that at ISO 1600 there was much less visible noise than on the K20D. Expanded ISO range on the K-7 can go up to 6400.(Under the paragraph of "New Sensor")
全新設計的CMOS和PRIME II處理引擎
.增進記憶體頻寬的可能性,加速影像處理
.四色通道的感光元件增進細節和色彩的精確性
.為了讓白平衡更準確,白平衡改以原色判別
.較少的噪點
這個四色通道的Sensor也對自動對焦的速度做出貢獻
.....users should be impressed with the overall increased AF speed, which is more responsive to color and temperature variations thanks to the new sensor, by taking the best of the 4 colors to find the strongest contrast......(under the paragraph of "Fast Focusing")
就等實測了,希望效果有他們預期的那麼好...




























































































