8" x mile²

LiveeviL2000 said:
I agree with with @gball
I’ve been at sea and there are times you could see
to the worlds edge, where the sky seems like the shape of a dome as it hits the horizon and you swear you can see forever with other vessels on the horizon. Other times, the horizon seems closer and not so vast.
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Me too.

I’ve been at sea and there are times you could see (8" x mile²)
to the worlds edge, where (8" x mile²) the sky seems like the shape of a dome as it (8" x mile²) hits the horizon and you swear (8" x mile²) you can see forever with other vessels on (8" x mile²) the horizon. Other times (8" x mile²), the horizon seems closer and (8" x mile²) not so vast.
 
Well, look at the size of boats vs oil rig. If the boat was at the same distance as rig that is one HUGE ass boat. Telephoto will compress distance ie - further objects will appear larger, watch football to see this. Boat obviously nowhere near as far as rig.
Overthinking this. Between rig vs boat distance and refraction it seems obvious to me.


0iVcseT.jpg
 
Jethro Rocker said:
Boat is much closer than the rig. Rig is also very tall. Add refraction in.
Voila.
Even not accounting for curvature, the 3000mm lens cannot resolve a boat at 25 miles.
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Welcome to the discussion Jethro! Actually with a 3,000mm lens, I can pull in the moon from my backyard and it's 238,900 mi away. Sheesh, 25 miles is a piece of cake.

 
I don't know how many light years away this star is, nor do I know the name of it, but it would seem to be a great lighting effect for a gig! Another video captured from my back yard using the Nikon P1000 on 9/17/2022

 
WavMixer said:
I don't know how many light years away this star is, nor do I know the name of it, but it would seem to be a great lighting effect for a gig! Another video captured from my back yard using the Nikon P1000 on 9/17/2022

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The round effect is because it is out of focus. Try manual focus and adjust till it is a sharp dot. Really cool camera I am tempted.
 
Jethro Rocker said:
Yes nice! Moon is also huge comparitively to an oil rig! 3000mm is about like 60 power.
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The P1000 is 125x zoom. I captured this the same night that I got the stars. I believe that this is Jupiter and moons. The news said Jupiter was visible so I can only assume this is Jupiter. It does appear as a dot that is 369.59 million miles away. Please excuse the rank armature camera work. This was my first time using this camera, I was in the dark and no wireless remote. The daytime moon shot was taken after I had a little experience with the camera and daylight to see the buttons and controls.

 
WavMixer said:
Welcome to the discussion Jethro! Actually with a 3,000mm lens, I can pull in the moon from my backyard and it's 238,900 mi away. Sheesh, 25 miles is a piece of cake.

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Jethro Rocker said:
Boat is much closer than the rig. Rig is also very tall. Add refraction in.
Voila.
Even not accounting for curvature, the 3000mm lens cannot resolve a boat at 25 miles.
Click to expand...

What is the size relativity to a ship 25 miles away to a moon almost 250 million miles away? I still don't think it would "get" the ship, at least to any significance.

I don't think the ship would even look anywhere near the same as the moon does with the naked eye sitting on your thumb tip from their distances.
 
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No relativity between the ship and the moon. I was demonstrating the optical zoom capabilities of this camera. Be it a boat on the Earth or a crater on the moon, this camera amazes me every time I use it. It's the Marshall double stack of point and shoot cameras.
 
WavMixer said:
In physics, refraction is the redirection of a wave as it passes from one medium to another. The redirection can be caused by the wave's change in speed or by a change in the medium.



In both pictures here, you can see how the change in medium has redirected the light waves.

Refraction_photo.png
220px-Pen_in_water.jpg


This I understand. However these images show a change in medium that cause the refraction. There was no change in medium in my video.
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You say medium ....


1665238684096.png
 
WavMixer said:
No relativity between the ship and the moon. I was demonstrating the optical zoom capabilities of this camera. Be it a boat on the Earth or a crater on the moon, this camera amazes me every time I use it. It's the Marshall double stack of point and shoot cameras.
Click to expand...
Without a doubt, a super cool camera! I am very tempted to try one...

As for boats and distance, an example of field of view is at 15X you can see about 235 yrds wide at 1000 yards depending on optics.
So 235 yards x 3 = around 700 feet wide in the field of view.
As your camera has equivalent to 60x (3000 mm) that is 4x the 15x above so you would see one quarter of that at 1000 yards. Less width in the field of view.
700/4 = 175 feet at 1000 yards.
If those big boats are what, 40 feet long?? 60?? Boat didn't fill the view but...
if you could fill screen with a 40 foot boat then field of view would be 40 feet so 175/40 = 4.3 meaning you are 4.3 x further than 1000 yards away so about 4300 yards or 12,900 feet or about 2.5 miles from the boats.
Rough figures. Obviously varies but something similar. Again the oil rig is like 250 feet above sea level and refraction also enters into it.
 
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