The Canon EOS 5D Mark II with the great features: the 21.1 megapixel, full-frame CMOS sensor, and the ability to record video at 1080p high-definition, shoot HD movies, an expanded ISO range of 50-25600, surpassing the original 5D (50-3200), a larger 3 inch LCD screen with 920k dots and Live View, built-in dust prevention system and continuous shooting at 3.9 frames per second.
The EOS-1Ds Mark III is the seventh Canon professional EOS-1D series digital SLR. The last EOS-1Ds, the Mark II, the Mark III pushes digital SLR resolution over the twenty megapixel barrier with specifically twenty-one-point-one million pixels (5616 x 3744) on its 36 x 24 mm (full 35 mm frame) sensor.
About EOS 5D Mark III(EOS 6D), there are just some rumors, of course, many many people hope it will come out soon. It is surely will be an amazing. It is said that the Canon EOS 5D Mark III will be the replacement of Canon 5D Mark II
Now, let`s read some key difference features between EOS 5D Mark II and Canon EOS-1Ds Mark III
Then Canon EOS camera always record video in MOV formats, if you want to import your Canon EOS 5D Mark II/III and EOS-1Ds Mark III video to Windows Movie Maker, Vegas, Samsung Galaxy s2, Samsung Galaxy Tab 10.1, Motorola XOOM, Motorola Droid Bionic, Motorola Atrix 4G, Acer Iconia Tab A500, iPad2, iPhone4, iPhone5 etc for playing and editing etc, you`d better convert Canon Mark II/III and EOS-1Ds Mark III mov video to mp4, avi, wmv, mpg, flv, 3gp etc on Windows 7 using AVCHD Video Converter, EOS 5D Mark II MOV converter, EOS-1Ds Mark III MOV converter.
If you are a Mac user, and want to import Canon EOS 5D Mark II/III and EOS-1Ds Mark III mov video to iMovie, FCE, FCP, etc, you `d better convert camera mov video to STD mov on Mac using AVCHD Camcorder Converter Mac.