Several issues with the 283 for ad hoc studio use.
Older units have tremendious sync Voltages. I have one that has a sync Voltage in excess of 300 Volts. I have measured units in excess of 500 Volts (that belong to friends).
As shipped they only have full power manual.
There was an add on Vivitar device that you can set variable manual power on a 283, but few of these were originally sold, so they are in short supply, so go for a premium, often for more than an actual 283 flash.
But, there are piles of the 283 out there and there is a cornucopia of useful add on accessories, more than for any other hotshoe flash.
Personally, I think a new Sunpak 383 ($80.00) is a far better choice, where the manual power setting is built in and the sync Voltage is intrinsically very low.
A good used Vivitar 283, with a good used manual power level device, would net a cost approaching a new Sunpak 383 (or a new Vivitar 285HV, see the recent thread on this flash).
Unlike the 283, The 285 has built in full, 1/2, 1/4, and 1/16 power levels (no 1/8th). But, older 285 also have tremendous sync Voltages.
Whatever you envisioned dong with a Vivitar 283, just do with a Sunpak 383 or the new Vivitar 285HV (has a low sync Voltage).
Enjoy! Lon