bump. I can never find the appropriate tutorials.

>two seconds googling 503cx with flash
>find everything
Kill yourself my lad.

>>2880931
Often with stuff like the hassey as it is a studio camera so you would have studio flashes with either a master or a generator via PC cable.
With 135 cameras you are often locked into a system of flashes. you can almost always convert to PC (X-Sync) one way or another and then use something like a light meter to determine what the correct exposure is.
If you want to use more compact flashes you could look at something like METZ, depends on you camera how you hook it up. If you want better advise describe exactly what you want to achieve and ill see what I can do. However you may consider the sqt for a question like this in future.