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If you standing on Earth and you put dime at an arm's distance it blocks the Moon. Or if you had someone hold a basketball [24 cm diameter] up about 50' away the basketball would block the Moon. At this same distance on the Moon, the Earth would be blocked by disc which was about 88 cm in diameter. If you are about 768,000 km [twice lunar distance] from both the Earth and the Moon, both the Earth and Moon would be 1/2 these diameters- Earth 44 cm and Moon 12 cm. And twice the distance again 1,536,000 km- Earth is 22 cm and moon is 6 cm. So, at Sun/Earth L-1 (about 4 lunar distances from Earth) the Earth would appear slightly smaller than the Moon from Earth- though the Earth would be far brighter than the Moon. The Moon depending on it's orbit would go from 3 lunar distances to 5 lunar distances [9 cm to 4.5 cm].
At Sun/Earth L-1 shortness distance to the Moon, the Moon appears to be less than 1/2 it's diameter than seen from Earth [9 cm diameter as compare to 24 cm diameter from Earth]. The brightness of the Moon would reman around same, but because Earth is so much brighter, the Moon would appear to a camera and even to an human eye as much dimmer. The Earthshine would dim the stars to a human eye far worse than a full Moon, and for camera (that doesn't adjust like a human eye) the stars would be wiped out showing an inky field. Of course with camera image you can distort the image. You could make it appear as though someone were on Earth on clear night and dark sky looking up at Earth with the Moon in orbit about it and allow the viewer to look away from the bright Earth and see the stars. Or you could dim the Earth and brighten the Moon and brighten the stars. And could zoom in and zoom out- even giving the viewer the illusion movement. With big enough telescope [say, much bigger than Hubble] and far more data tranfer capability, you could do a Star Trek show, only with "realistic" footage. The tech level could be fusion impulse engines- giving say up to 10 gee accelleration with partial inertia dampers and of course overlays of computer animation. Of course at this tech level star travel is possible. Of course, you want some action, so you set it for around mid-21st Century and first contact with the Vulcans. Now, what would happen if a movie production company had a bigger and better telescope than any others. Perhaps they could form a partnership with "real science" groups which allowed real science to be part of the show. This could make Lord of the Rings look like small time production.
Now, "all you need" is to add an "Angel donor" like Bill Gate who will put up a couple billion and somehow get the miltary so doesn't go bananas over the idea of this vastly superior spy telescope in private hands:).