Sony HDW 730 and HDW 750

The HDW 750 and HDW730 series has an inbuilt 1920x1080 HDSDI output as well as a down convertor (SDI) output whereas the f900 needs adapters. The f900 has 12 bit processing and the 750/730 is 10 bit. The f900 has a greater range of tones and colours at the expense of a larger heavier and more power hungry camera not to mention it is more expensive, certainly if you add up the cost of down conversion and HDSDI output adapters.
The 750p and 730 have a loop record function as an optional extra, where a RAM buffer holds 8 seconds of video and audio as in the DVW790. So it is possible to roll tape thus recording the previous 8 seconds, a useful feature for wildlife and news cameramen.
This feature is also used for timelapse but exposure duration does not exceed 1/25th second..
The HDSDI output via a single cable carries full quality uncompressed HD picture, with timecode and audio in perfect synch.