major differences between NEX-5, NEX-5N, NEX-5R, NEX-5T starting from NEX-5N, the low light performances improve a lot, using APS-C 16 Megapixel Exmor IMX071 sensor 2 The cons, is that there is no port for tethering, and you need make/buy an IR intervalometer, and use IR sensor on the handle to do the trick replacing the IR blocking filter: you can easily find a second hand body for ~hkd 1,000-1,200 cloudynights: NEX-5N astromod NEX-5N astrophotography Hhastro DPreview DxOMark shutter release port of other sony models NEX-5 series is basically running Linux CE with source codes provided gphoto support is NOT available discussion for NEX series 1 , 2 download image(PTP mode): ok remote capture(aka tethering) (PC control mode): not ok Someone 1.00 hack on A55 OpenMemories tweak PlayMemories ( not avail for Alpha 7,9) PMCA smart remote control app support on NEX-5T, NEX-5R ifixit Shutter app on iPh...