The catalog says that when the cells are used together the f/11 goes in front of the shutter, the f/8 goes behind the shutter.
It is a triple convertible lens. Each cell can be used by itself or the two can be used together. The two together should give 223/4.5. Single cells and the set cover at least 5x7.
Telephoto? Long focus yes, single cells' back focus usefully shorter than focal length, no.