To this question I add ,, I want to know your easy and the favourite portable adaption of 203FE with portable flash like Nikon SB 80DX with a hot or Cold shoe on the camera. Your advice is highly appreciated as this is some issue I am looking to sort out. Thanks for your reply.
I do not understand the question as you have a pc socket on the FE body, so if you use 1/90 s for studio or you use the lens flash in "C" mode.
Yes you can use a "wifi trigger" for studio flash or strobiste flash.
Personaly I use a small Leica SF 20 flash and 2x SB-26 Nikon: The Leica flash is one of the lightest flash I know that may be used in M with partial power and the old SB-26 has the D mode for slave that works pretty well with all type of flashs.
For reason I do not know, I've seen some non-standard 203FE with flash holder on the side (like late Rolleiflex) that may be very usefull with a SB-16 flash.