[Fred Hayek]

BTW there is little difference between the Hubble and the KH-13.

[PIF]

BTW there is little difference between the Hubble and the KH-13.

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Other than the case design, focal length, and ability (rumored) to change orbits ... other than that both are similar because they were launched by rockets, have a similar mirror size, and stem from the same base military design. BTW the NRO's next round, NROL-71, is due for launch soon and will likely have a higher orbit than their predecessors.

Kh13 amateur photo:

Hubble