The Focal-Plane was produced in three models:

Original Model

Later called the number 1. This was introduced in 1891 and was essentially a large roller-blind shutter operating near the film plane. Early models were generally speeded to only 1/500 or 1/1000 if requested. The speed was only varied by the spring tension and a limited speed range was offered. Later models, from 1893, allowed the slit width to be altered. The width was difficult to change as the edges of the blind had to be lifted from the wooden frame, a chain that connected the two blinds was unhooked, the length altered and put back, this had to be done at each end of the blind. The speed was found by multiplying the number of links in the chain by the tension speed (1/200 - 1/1000). Later models were fitted with a dial to give the speed. This model continued to be sold after the introduction of the improved model.

Improved Model

Later called No. 2. With this model, introduced in March 1902, the slit width was varied from outside, which was a lot easier. Early versions were fitted with a dial to calculate the exposure, from around 1905 this was replaced by a table.

No.3

Introduced in 1907 with a different arrangement for setting the speed, later a No.4 model was sold but was a very different type of shutter.