Killtown & His Frozen Fireball

Not to mention that there is such a thing as manual focus. A camera operator with a small amount of skill can manually focus a shot at a new depth a lot quicker than the auto-focus works.
 
Corsair 115 said:
With the caveat that the camera has to be focused properly when zoomed in. Then you can zoom out as far as one wants without losing focus. Being focused when zoomed out and then zooming in will cause the focus to go soft however.
Click to expand...

Perceptively so, yes, but in fact, no.

The lens will still be focused at the same point, regardless, however when you zoom in you enlarge the area you're looking at, thus an area you thought you were focused on, you realise you weren't focused on at all.

The actual focus point doesn't change, however, zooming in makes it easier to distinguish between an area that is in focus and an area that is not.

(There's also the issue of depth of field, which changes, however this is more relevant to film cameras than video cameras, as film cameras have a much narrower depth of field).

-Gumboot
 
I've watched the video now. The guy is zooming out. If an image is in focus, and you zoom out (rapid or otherwise is irrelevant) the image CANNOT go out of focus except under one of two scenarios:

1) The operator intentionally pulls the shot out of focus during the zoom
2) The back focus is incorrectly set

Unless one of the above is apparant, zooming out from an in-focus image can ONLY result in a wider in-focus image. There is no exception.

For those who are curious, the "back focus" is a small focus on the lens in front of the CCD, inside the port where the lens sits. IF sits between the back element of the lens and the CCD. If the back focus is out you cannot maintain focus in a camera at all, and everything you shoot is liable to be ruined. Camera operators are incredibly pedantic about checking back focus when they pick up a new camera, and playing with the back focus is considered a heinous sin.

-Gumboot
 
Gumboot is right, focussed is focussed. There's is some fringing that occurs depending on the number of elements in the lens, and the treating on the glass. In either case they just become less apparent when you zoom out.
 
gumboot said:
1) The operator intentionally pulls the shot out of focus during the zoom

-Gumboot
Click to expand...
Quite easy, and much more so the longer the zoom (unintentionally). Fringing, number of elements aside, this would be numero uno.
 
3bodyproblem said:
Quite easy, and much more so the longer the zoom (unintentionally). Fringing, number of elements aside, this would be numero uno.
Click to expand...


Yeah but Killtown's issue is that it DOESN'T go out of focus.

-Gumboot

ETA. One other thing. The zoom was not a fast zoom, by any measure. It was of pretty average speed. Most professional news gathering cameras can zoom fairly fast on autozoom, and if the gyro is disengaged manual zoom can be done in about half a second with ease.
 
ok, i just saw the video, and the last sequence he's talking about is a digital zoom.
 
What is the point of all this? Is Killtown saying they faked the explosions too? Cartoon explosions to go with cartoon planes(Killtown's words, not mine)? So, essentially, New Yorkers watching the Towers as the events were being faked would've seen them just standing there as normal before fires and demolitions commenced??

Ace?
 
apathoid said:
What is the point of all this? Is Killtown saying they faked the explosions too? Cartoon explosions to go with cartoon planes(Killtown's words, not mine)? So, essentially, New Yorkers watching the Towers as the events were being faked would've seen them just standing there as normal before fires and demolitions commenced??

Ace?
Click to expand...



MK-ULTRA!!!11!!!!

Yes, basically his contention is that not only did they fake the fireball, but they only animated a partial fireball sequence, thus when CNN used their fake footage, they had to create an in-frame zoom in post production, to give the illusion that their still frame was actually a continuation of the image.

-Gumboot
 
gumboot said:
No it's not.

-Gumboot
Click to expand...

unless the camcorder the user had was high end, it had to be a digital zoom. the zoom was 7x-10x (hard to tell from the video, probably 10x) very few optical zooms available in this focal length, less so for camcorders. unless it was a professional, the chances of it being optical are very slim. at the time, the only manufacturer i can think of was Zeiss. the camera shake also stops during the zoom. dollars to donuts on digital gum.
 
3bodyproblem said:
unless the camcorder the user had was high end, it had to be a digital zoom. the zoom was 7x-10x (hard to tell from the video, probably 10x) very few optical zooms available in this focal length, less so for camcorders. unless it was a professional, the chances of it being optical are very slim. at the time, the only manufacturer i can think of was Zeiss. the camera shake also stops during the zoom. dollars to donuts on digital gum.
Click to expand...


It's not a digital zoom. Digital zooms are very obvious. Furthermore, digital zooms are only present on cheap consumer handycams.

This was shot by a CNN cameraman. I would be very surprised if he was using anything other than a Beta SP or DigiBeta camera.

A standard industry camcorder zoom lens would have no problem with a shot like this - standard Fujinon lenses are generally around 8x zoom.

-Gumboot
 
I continue to be amused by Killtown's fascination with the ability of things to float in midair when you slow down a video shot at 30 f/s to 1 f/s.
 
gumboot said:
It's not a digital zoom. Digital zooms are very obvious. Furthermore, digital zooms are only present on cheap consumer handycams.

This was shot by a CNN cameraman. I would be very surprised if he was using anything other than a Beta SP or DigiBeta camera.

A standard industry camcorder zoom lens would have no problem with a shot like this - standard Fujinon lenses are generally around 8x zoom.

-Gumboot
Click to expand...

that being said, do you prefer chocolate glazed or plain?
 
3bodyproblem said:
that being said, do you prefer chocolate glazed or plain?
Click to expand...


We talking filters or an afternoon snack? ;)

Just had a look and the current DigiBeta doesn't have digital zoom, but Panasonic's DVCPRO range does have digital zoom up to 4x.

The largest zoom Fujinon offers for industry handycams is 47x with 18x being the largest zoom for digital cinema lenses.

-Gumboot
 
When i was going on about it i forgot that it was CNN footage, and they would undoubtedly have "high end" equipment. but i still have a feeling the video has been edited, it just "feels" wrong. and the way the crane swings in, then the way he mentions it suggests he is deliberately trying to draw you away from it. anyone else getting this vibe or am i just crazy?
 
3bodyproblem said:
When i was going on about it i forgot that it was CNN footage, and they would undoubtedly have "high end" equipment. but i still have a feeling the video has been edited, it just "feels" wrong. and the way the crane swings in, then the way he mentions it suggests he is deliberately trying to draw you away from it. anyone else getting this vibe or am i just crazy?
Click to expand...


The video has been edited, as Killtown says - it's from a CNN compilation, that he has then further edited.

The zoom is much smoother in the original footage, I imagine either Killtown's video is poorly streamed or it was uploaded wrong.

The crane is just a coincidence. I'm not sure what the point was in pointing it out.

-Gumboot
 
You must log in or register to reply here.

Back
Top Bottom