Hi Raid,
I have never seen a Thambar in person, but I have a complete set of Rodenstock Imagons, which are in some ways similar to the Thambar (sort of). What we have here is a classical timeless way to shoot a portrait. The camera is 8x10", the lighting is soft and the depth of field is about as thin as a sheet of paper at this shooting distance. Also it requires a view camera that has sufficient bellows extension. I would say the camera is racked out six to seven feet from experience! Few cameras have this much degree of bellows extension; My Sinar Normas do this kind of job for me.
Soft lighting, ultra high large format fidelity (sharpness), if you put your nose against the computer screen, you can count the pores in the skin, count the threads in a garment, count the eyelashes, etc. I love this effect. Believe me, printed 16x20 or 20x24 nearly life size these types of portraits have a lot of impact.
The bokeh is lovely, eh? Not soft focus, just out of focus.