@rut A RAR file is a compression file like a .zip. You will need to uncompress the RAR and you should find a BIN file inside, which you can copy to the sd card etc. You will need software like WINRAR to decompress the file.
@PARD_Tech I just saw some details of the recent ds37 firmware update. Can we confirm that the zoom has been increased to 4x (above base mag) on all models? ie the 70mm now zooms to 22.4x? That would probably make it a must buy for me!
