Heath Carmody | Strong Magnification - 4K Refraction Time Lapse (Observation #5 All High Footage) @heathcarmody2867 | Uploaded April 2023 | Updated October 2024, 3 hours ago.
An attempt to showcase the magnification effects of a highly refractive atmosphere, and the large vertical displacement that occurs from early afternoon to early evening on a typical nice spring day. For the first big scene, my camera was zoomed a ways into the digital zoom. I try to limit it to optical zoom, but this highlighted the wavy refraction distortion that seems to be stronger the higher I go up the beach, even though my camera is at least a meter off the ground and 15-16 meters above the water. Most of the rest is shot from much wider angles and the effects are much less noticeable, but still pretty strong.
No claims or model comparisons for this one, since I don't have a good eye level reference from that height. The rough angular scale provided should give you an idea if you want to do your own rough analysis. I'm also working on a longer video or series about the "double inferior mirage" seen in many observations including this one from the lower cameras. It will go into detail about the specifics of this observation, and challenge the classifications of inferior and superior mirages.
I don't know what caused the lateral movement in the first main scene, or what makes it return near the end. The OIS was turned off. The breeze wasn't strong enough to move or gradually pivot the camera sitting on a rough aggregate concrete slab table. But I guess anything is possible. I'm leaning towards refraction on this. Considering the range of displacement on the vertical, I think a little bit of temporary horizontal shifting could occur. This small degree of movement would not be noticeable by eye, especially spread over that long of a duration.
I also don't know what is causing the focus issues. This was auto focused nice and clear, then locked and set in manual focus for the time lapse. If there were some kind of rapidly changing non-physical lens between the camera and the target, that might explain it. I'm open to discussing alternate theories for any perceived "full frame" movement, and I will get it sorted soon.
There's a few other interesting things happening in this time lapse. The distant lake water so calm it's hard to tell reflection from inferior mirage at times, possibly some "gravity waves" on the farthest visible land, and a strange look to the water surface as the sun was departing.
An attempt to showcase the magnification effects of a highly refractive atmosphere, and the large vertical displacement that occurs from early afternoon to early evening on a typical nice spring day. For the first big scene, my camera was zoomed a ways into the digital zoom. I try to limit it to optical zoom, but this highlighted the wavy refraction distortion that seems to be stronger the higher I go up the beach, even though my camera is at least a meter off the ground and 15-16 meters above the water. Most of the rest is shot from much wider angles and the effects are much less noticeable, but still pretty strong.
No claims or model comparisons for this one, since I don't have a good eye level reference from that height. The rough angular scale provided should give you an idea if you want to do your own rough analysis. I'm also working on a longer video or series about the "double inferior mirage" seen in many observations including this one from the lower cameras. It will go into detail about the specifics of this observation, and challenge the classifications of inferior and superior mirages.
I don't know what caused the lateral movement in the first main scene, or what makes it return near the end. The OIS was turned off. The breeze wasn't strong enough to move or gradually pivot the camera sitting on a rough aggregate concrete slab table. But I guess anything is possible. I'm leaning towards refraction on this. Considering the range of displacement on the vertical, I think a little bit of temporary horizontal shifting could occur. This small degree of movement would not be noticeable by eye, especially spread over that long of a duration.
I also don't know what is causing the focus issues. This was auto focused nice and clear, then locked and set in manual focus for the time lapse. If there were some kind of rapidly changing non-physical lens between the camera and the target, that might explain it. I'm open to discussing alternate theories for any perceived "full frame" movement, and I will get it sorted soon.
There's a few other interesting things happening in this time lapse. The distant lake water so calm it's hard to tell reflection from inferior mirage at times, possibly some "gravity waves" on the farthest visible land, and a strange look to the water surface as the sun was departing.
