THE "ECLIPSE" INSTANTANEOUS SHUTTER.
For simplicity of construction and operation, for reliability and good results obtained with it, the "Eclipse" Shutter has gained an enviable reputation. It is safe to say that no shutter is better or more favorably known.
The "Eclipse" is made wholly of metal, and is finely finished. It attaches over hood of lens by a velvet-lined collar, and has a clamp to securely hold it in place. It is made in five standard sizes, collars for hoods of lenses being attached to a shutter of the most suitable size.
When the shutter is in a locked position ready for an exposure, the right-hand leaf of fly covers the aperture of lens. When released, the fly revolves, uncovering the aperture, which is again covered by the left-hand leaf.
When the shutter is in the position shown in cut, less illumination is given to the foreground; but by p128 adjusting the shutter in different positions any part of the view may be favored.
The hair trigger release may be operated either by hand, by a cord, or by a pneumatic device. The pneumatic apparatus costs $1.00 extra.
The speed of the shutter is perfectly controlled by moving the spring on back of shutter from notch to notch on the curved arm.
[PROSCH'S] "DUPLEX" PHOTOGRAPHIC SHUTTER.
With this shutter, the latest production of the inventor of the very popular "Eclipse" shutter, exposures can be made of any desired duration. It is equal p129 to any requirement for the most rapid work, and as a time shutter, exposures can be made as quick as two pulsations can be given to air bulb (about one-tenth of a second) or of minutes' duration.