Lens:

f10, 5" single achromat, iris diaphragm to f30 (Looking into the lens the figures read 30, 20, 10).

Shutter:

None.

Construction:

Polished mahogany with brass binding, finger joints. Red square cornered tapered leather bellows.

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.

Identification:

Lancaster silver shield let into top. Ivory name and maker's plaques.

Movements:

Rising front, cross front, tilting back.

With:

3 double dark-slides, brass bound. Cloth bag-type case. Lancaster tripod and top.