In an internal focusing telescope
A. the objective is at a fixed distance from the diaphragm
B. the focusing is done by the sliding of a divergent lens.
C. the focusing divergent lens is situated at about the middle of the tube
D. all the above.
Answer:D
In an internal focusing telescope
A. the objective is at a fixed distance from the diaphragm B. the focusing is done by the sliding of a divergent lens. C. the focusing divergent lens is situated at about the middle of the tube D. all the above.