210 with 12" bellows..how close?

[emcd]

Hi, I am new here and to LF..

I do portrait work, and I would like the option to do a tight shot of a face where the just the head fills the frame. How many inches of extension would I need with a 210 for this?

Alternately, would a 250 or something make more sense to achieve this? I want to have the choice to shoot the range from full body shots, up to tight face shots.

thanks!

(I've been looking at different field cameras, and the ones in my budget seem mostly to have only around 12" bellows extension..)

[Dan Schmidt]

4x5?