The 340 is one of those models of the 100-400 series line of Polaroid folding Packfilm Land Cameras which had a coupled rangefinder with automatic parallax correction on the top AND a development timer in the rear. This camera shares a common set of features with all models in this line:
- Folding Bellows
- Automatic Exposure
- 100-series Packfilm
The camera's shutter speed is set automatically by "electronic eye" (CdS?), an aperture priority program and a "lighter-darker" setting dial between 10 sec. and 1/1200 sec. Its lens is a 3 element glass lens (114mm f8.8).