Nikon cemented its top-level digital SLR cameras into two groups, namely FX format digital SLR cameras and DX format digital SLR cameras. Included in the FX format series are digital SLR cameras that come with a 35mm full-frame sensor, while digital SLR cameras equipped with an APS-C sized image sensor with 1.5X crop factor belong to the DX format series. As Nikon launched its flagship DX format digital SLR camera back in 2007, the Nikon D300, many people said that it was the best semi-professional digital SLR camera ever. Two years later, Nikon refreshed the D300 and introduced its successor, the Nikon D300S, which is equipped with almost the entire feature set of the previous D300 plus several must-have new features in order to compete with the latest digital SLR cameras on the market and retain its predecessor’s title as the best semi-professional digital SLR camera.
The Nikon D300S is a well-rounded digital SLR camera that comes with a 12.3-megapixel DX format CMOS sensor (equal in size to an APS-C sensor), a Nikon Expeed processor, a 3-inch TFT LCD screen with 920,000 dot resolution, and a weather-sealed body. Some people might be slightly disappointed to see that Nikon once again uses the same 12.3-megapixel sensor that has been used across several models, but we think that the sensor has proven itself to be worthy by offering a good balance between resolution and noise handling.
As for the new features, the Nikon D300S is now capable of recording 720p High Definition videos at 24 frames per second. The 720p HD video recording feature has indeed been seen before on the Nikon D90 and the Nikon D5000; however, the D300S also comes with some genuinely new features. First is the inclusion of a contrast-detection autofocus system that operates while in movie mode, this feature is first seen on any Nikon digital SLR camera. Another very important new feature is a new storage system that features dual memory card slots. The new storage system allows you to backup your images as you take them, or record RAW images to one card and JPEG images to the other. Last but not least, the D300s now comes with an increased continuous shooting speed of 7 frames per second.