Yes, there is a telescope strong enough to see the equipment left on the Moon. The equipment left on the lunar surface by the Apollo missions, such as the Lunar Roving Vehicles (moon buggies), Lunar Module descent stages, and various scientific instruments, can be observed using powerful telescopes on Earth.
The largest optical telescopes on Earth, like the Keck Observatory in Hawaii or the Very Large Telescope (VLT) in Chile, have the ability to resolve objects on the Moon with remarkable detail. These telescopes have mirrors with diameters of around 8 to 10 meters (26 to 33 feet), enabling them to achieve high-resolution observations.
However, it's important to note that the equipment left on the Moon is relatively small and distant. The Lunar Roving Vehicles, for example, are about 4 meters (13 feet) long, and the descent stages of the Lunar Modules are roughly 4 to 6 meters (13 to 20 feet) across. To see them with telescopes on Earth, special techniques such as adaptive optics, which correct for atmospheric distortions, would likely be necessary.
Additionally, observing objects on the Moon with such high-resolution telescopes would require precise coordination and planning due to the challenges posed by the Earth's atmosphere, lunar lighting conditions, and the specific locations of the equipment on the lunar surface. Therefore, while it is theoretically possible to observe the equipment left on the Moon with powerful telescopes, it would be a complex and specialized endeavor.