Post by Kiwi on Feb 17, 2011 6:08:26 GMT -4
I've been checking out some so-called UFO sightings in 2009 that, as far as I can tell, are in many cases the usual ones of Venus and Jupiter, particularly back when Jupiter was at opposition and therefore at its brightest around August 2009.
While I know a fair bit about still cameras and photographs, I know little about movie cameras and even less about video cameras, and would like to know what exactly can be expected when someone turns an amateur video camera on Venus and Jupiter in dark sky.
A few comments I've seen say that without the camera's zoom being changed, the size of the "UFOs" change and that they pulsate periodically and their colour changes. Could these effects be caused by an automatic camera changing itself because of the oddball subject, a small bright light in dark sky?
I imagine that at least some of the comments about the UFOs darting around the sky are due to good old-fashioned camera-shake.
Does anyone have links to websites that show examples of what video cameras can produce under such circumstances? I've Googled the subject, but the term UFO produces hits for a hell of a lot of crank websites! I'm interested in any sites by debunkers or video techies who show exactly what the cameras do with such subjects.
Many years ago there was a bit of a flap over one particular "UFO" caught on movie film, but someone later showed that the same effect could be produced by aiming that particular make and model of camera at any artificial light that was backed by blackness and that the camera was actually focusing on its own internal mechanism.
While I know a fair bit about still cameras and photographs, I know little about movie cameras and even less about video cameras, and would like to know what exactly can be expected when someone turns an amateur video camera on Venus and Jupiter in dark sky.
A few comments I've seen say that without the camera's zoom being changed, the size of the "UFOs" change and that they pulsate periodically and their colour changes. Could these effects be caused by an automatic camera changing itself because of the oddball subject, a small bright light in dark sky?
I imagine that at least some of the comments about the UFOs darting around the sky are due to good old-fashioned camera-shake.
Does anyone have links to websites that show examples of what video cameras can produce under such circumstances? I've Googled the subject, but the term UFO produces hits for a hell of a lot of crank websites! I'm interested in any sites by debunkers or video techies who show exactly what the cameras do with such subjects.
Many years ago there was a bit of a flap over one particular "UFO" caught on movie film, but someone later showed that the same effect could be produced by aiming that particular make and model of camera at any artificial light that was backed by blackness and that the camera was actually focusing on its own internal mechanism.