Rainy day photo test shoot with Weston (the joys of being a photographers son!) and a question for the group.

Shen Hao HZX-IIA
Nikon 210mm 5.6f W
Fuji FP-100C45
Natural Light

Q: I shot this with the 210mm and I like the tight crop and spect ratio, but I also have the Fujinon 250mm 5.6f SF that I would like to use for similar types of head shots. The problem is that the Shen Hao bellows were at already max extension with the 210mm and I couldn't get it to focus with the same crop and aspect ratio with the 250mm. What can I do? different camera? lens board extension?

Thanks in advance