Basically, though, some flat earthers have made videos showing how if you take a good camera and zoom in on the moon, you can see remarkable detail of its topography.  I find it difficult to believe that you could get that kind of detail when we're 238,000 miles away from the moon ... allegedly.  On earth, the best cameras can't get anything but a blurry picture from more than a few miles away.

I have heard that even today's amateur telescopes are good enough to show some details on the moon.  I didn't pay too much attention at the time but I think it was in an astrophotography docuмentary that I watched a few months ago.
I have always assumed that the changing size of the moon is an optical illusion, some full moons at rising, at least here in the desert look HUGE, like if you hold a dinner plate at arms length up to the sky, other months it looks more like the diameter of a mug.  I don't think the earth or the moon are actually moving closer or farther apart so I just figured it must be an optical illusion based on something I didn't understand. 

Basically, though, some flat earthers have made videos showing how if you take a good camera and zoom in on the moon, you can see remarkable detail of its topography.  I find it difficult to believe that you could get that kind of detail when we're 238,000 miles away from the moon ... allegedly.  On earth, the best cameras can't get anything but a blurry picture from more than a few miles away.

That does seem pretty fantastic.  

Basically, though, some flat earthers have made videos showing how if you take a good camera and zoom in on the moon, you can see remarkable detail of its topography.  I find it difficult to believe that you could get that kind of detail when we're 238,000 miles away from the moon ... allegedly.  On earth, the best cameras can't get anything but a blurry picture from more than a few miles away.

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To settle your questions, I recommend finding an astronomy club meeting in a shopping center parking lot in the evening (for example) with dozens of fancy telescopes set up, trained on you-name-it.
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If it's a full moon, some will have their sights set on the moon and they are more than happy to answer all your questions. Some have elaborate photographic capability and can show you RIGHT NOW displays on their laptop screens of closeups of the moon as it happens.
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The best of them, with maximum magnification, cannot pick out fine details like the shape of car-sized boulders on the moon.
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The reason is, the moon is simply too far away to get such details.
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Plus, we are looking through the earth's atmosphere, which inherently involves some distortion, even on the clearest nights.
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You can ask them if any of them have seen or have heard of others seeing any of the physical remains of moon landings. Their answer is a unanimous "no." The lunar landers left behind are simply not big enough to be distinguished from large rocks, and obviously the rovers and their tracks, or flags, or footprints are likewise too small.
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But one thing can be seen. There are omnidirectional reflectors left behind which act like mirrors that return to the source in any direction the light that is shined on them, just as highway signs reflect your headlights regardless of from which direction you are approaching them. This is a simple, static prism arrangement of cells that always does the same thing: reflects light back to the source shining on it.
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This is how very precise measurements are possible, measuring to within a fraction of an inch the distance to the moon's reflector(s) at any given moment. This is how we can know that the moon is very gradually moving further away from earth, curiously. The same devices are used by surveyors to measure distances to objects on earth. But the equipment used for moon shots have more powerful lasers and you need to have special qualification to use them since if you accidentally shoot one at an airplane you could blind the pilot.
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Atmospheric lensing thru vapor IS an optical illusion.
Ask yourself this:
Does your finger REALLY get bigger when you stick it in a glass of water?
No. It only appears that way.
Does the street lamp REALLY get bigger on a foggy night,  as in the other example?
No.
It only appears bigger.

But doesn't this seriously HURT the case for flat earth?  If the moon gets significantly closer to us when it's overhead, since it's closer, its size should change measurably as it's moving around.

Example:

 Flat earth diagram is an x-y graph.

Your position is at zero.

Moon rises in east at 2 degree. 

Moon zenith is at 90 degrees. 

Moon set in west is at 180 degrees. 

Moon tracks in a level line above always, so farthest distance from zero is at rise and set, closest distance is at zenith.

But that doesn't mean you CAN see to the farthest actual distance at rise and set. You can only see to your horizon, due to perspective which averages 10-30 miles.

You can see the entire distance at zenith because there is no horizon blocking your view

No because average distance to horizon is only 10-30 miles.

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What a load of horse hockey.
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The moon and the sun each take a whole DAY to traverse the sky from horizon east to horizon west.
Then you claim that's "only 10-30 miles" away?
So the sun and moon travel at MOST 60 miles but take all day long to do so?

Give me a break.

You flat-earthers have a LOT of work to do.
Do you enjoy sticking your foot in your mouth?
Must be really fun or something cause you're doing it ALL THE TIME.  

No dummy.
Not what I said.
The average distance to the horizon at any location is 10-30 miles.
That's as far as you can see with your eyes.
I have no idea what the actual altitude of the moon is, but I know it's not 238, 000 miles.
The sun and moon are traveling 25, 000 miles in their circuit each day over the earth.

So you're saying that we never see the moon except when it's closer than 30 miles from us?

As the moon is traveling in its level path in its circuit above the flat plane of earth you will not -cannot- see it until it rises on your horizon at your particular location.
For most locations, the average distance to the horizon is 10-30 miles.
You can measure this for yourself with known landmarks at your locatio
Example: at my western horizon is a particular mountain: that mountain is 30 miles from my house.