The need for products for converting video from one format to another has never been greater.  Holdan has long held a reputation for having a conversion solution for a myriad of analogue and digital formats available in the market today. From composite and Y/C to DV, right up to HDSDI there is a solution to fulfil your needs. 
The acclaimed Thomson converters, (formally Canopus) provide a high quality extensive range to convert analogue video to FireWire and FireWire to analogue.  Thomson also produce HDMI to HDV and HDSDI to HDV converters.
Datavideo provide low cost DV to analogue and analogue to SDI converters with unique features.
Blackmagic Design supply the Mini Converter range, whose small size belies their big features. The Blackmagic Design Broadcast Converter offers the flexibility to convert HD and SD SDI to HDMI and Analogue or Vice Versa and HD Link units allow the monitoring of HDSDI on low cost LCD monitors with DVI inputs.
Holdan also distribute converters from Focus Enhancements and TV-One.
The TV-One range includes NTSC to PAL, and scaling options for formats like VGA, DVI and HDSDI.  If you have any questions regarding converters just e-mail converters@holdan.co.uk