Lens:

f4.5, 150 mm Tessar. Iris diaphragm to f32. Serial no. 107765 .

Shutter:

Volute, speeds 3 - 1/100, T, B. Combined shutter and diaphragm. Serial no. 1073755.

Construction:

Black polished mahogany with metal binding, finger joints. Black tapered leather bellows with diagonal corners.

Format:

3 ¼" x 4 ¼" plates held in double dark-slides.

Focusing:

Bellows to 23", rack and pinion movement to inner frame. Double extension of 12".

Attributes:

The front standard is fixed to the inner frame, focusing moves the inner frame forward. The rear standard slides along the bed. Reversing back with Lancaster's parallel links.

Movements:

Rising front, tilting back.

With:

6 double dark-slides, metal bound. Case.