head shots using a 180mm on 4x5?

[Frank Petronio]

Schneider Symmars and some other lenses were sold this way, as convertibles, ~ 1960s - the shutters even had markings for both focal lengths. You can certainly try it with other lenses of similar design, albeit working at f/12 (f/11 and a third-of-a-stop smaller) is a hassle. Also, because the way the rear group of elements focuses RGB at different places, it is mainly for B&W. Definitely something to test before promising people something from it.

[redu]

You can use even a 360mm f5.5 tele xenar or 360mm f5.5 tele arton with your available bellows draw. I think these might perform nicely as portrait lenses too. Wide open they will introduce a nice background bokeh.

[E. von Hoegh]

I have a Calumet cc-400 4x5 and one 180mm lens. If I use this lens for a head shot portrait will it work? By that I mean will the perspective look right?

Why not just set the camera up and see for yourself?

[Shac]

A 180 is what I use most for portraits - not necessarily at head and shoulders but close - then crop