The Sinclair Collapsible Lens Hood was made in a number of sizes and in two models:

• Early model, introduced in 1909, where the lens panel of the hood was cut for a particular lens diameter. The hood was fixed by a screw.
• 1920 model, where the hood was adjustable for different diameter lenses by a screw-adjusted clamping action.

Where the hood had to be a greater distance from the lens, when used with a shutter of N&S pattern for instance, a cone or short tube was used. The cone pushed onto the lens. Hoods for telephoto work had an extra extension piece attached to the front.

These were introduced in 1910, in 1928 the original design was altered to become self-erecting and a spring clip to attach the hood to the lens was added.