Lens:

f11, 5" Crouch wide-angle rectilinear, wheel stops to f45. Serial no. 2731 .

Shutter:

Two-blade sector working in opposite directions. Similar to Wollaston.

Construction:

Mahogany.

Format:

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

Focusing:

Fixed

Attributes:

T.T.H. spirit level.

Movements:

Rising front.

With:

Focusing screen.