STRANGE BLACK UFO PLANET IN FRONT OF THE SUN AFTER SOLAR MAS

Wed Jan 25, 2012 2:13 pm » by **Rich316**

fatdogmendoza wrote:Its a photography glitsch, also known as the black sun effect caused by a sensor problem with the camera

[youtube]mFaZXYhHrUI&feature=player_embedded[/youtube]

Now that I'm shooting more weddings with uncontrolled lighting environments, I'm noticing a big problem inherent in the 5D II; black dots in the center of directional light sources. Doesn't matter what type of light (LED, Tungsten, etc.) if its a directional light source and it's focused on you will see these black spots (it won't work on an overexposed sky or florescent light but a desk lamp, pro light or iphone LED light you will see it right away if you are focused on it.) The peculiar thing is that it only happens between ISO 640 and 2000. Once the camera is switched to ISO 2500 the issue disappears. It also is not present in still, video mode only. I'm surprised there hasn't been a bigger outcry about this issue since I'm noticing this as an issue win a lot of the wedding footage I shoot, especially with wider angle lenses since I typically have the subject in focus and the lights in the background as well.
http://www.dvxuser.com/V6/showthread.ph ... ht-sources

Ahh ISO settings I thought so. Thanks for clearing that up and the example vid too! good one!

Wed Jan 25, 2012 8:36 pm » by **Fatdogmendoza**

rich316 wrote:
fatdogmendoza wrote:Its a photography glitsch, also known as the black sun effect caused by a sensor problem with the camera

[youtube]mFaZXYhHrUI&feature=player_embedded[/youtube]

Now that I'm shooting more weddings with uncontrolled lighting environments, I'm noticing a big problem inherent in the 5D II; black dots in the center of directional light sources. Doesn't matter what type of light (LED, Tungsten, etc.) if its a directional light source and it's focused on you will see these black spots (it won't work on an overexposed sky or florescent light but a desk lamp, pro light or iphone LED light you will see it right away if you are focused on it.) The peculiar thing is that it only happens between ISO 640 and 2000. Once the camera is switched to ISO 2500 the issue disappears. It also is not present in still, video mode only. I'm surprised there hasn't been a bigger outcry about this issue since I'm noticing this as an issue win a lot of the wedding footage I shoot, especially with wider angle lenses since I typically have the subject in focus and the lights in the background as well.
http://www.dvxuser.com/V6/showthread.ph ... ht-sources

Ahh ISO settings I thought so. Thanks for clearing that up and the example vid too! good one!

You are most welcome rich

Wed Jan 25, 2012 11:09 pm » by **FullDisclosure**

Anyone seeing this tried looking at the sun through a welding mask or heavy light shield for the black dot? Try putting one of those filters over the camera lens too.
:robot:

Wed Jan 25, 2012 11:24 pm » by **Savwafair2012**

Thu Jan 26, 2012 12:45 am » by **Fatdogmendoza**

fulldisclosure wrote:Anyone seeing this tried looking at the sun through a welding mask or heavy light shield for the black dot? Try putting one of those filters over the camera lens too.

Go for it dude

Thu Jan 26, 2012 1:04 am » by **Housefull**

Cheers fatdogmendoza. Would/could you get the same thing in the flare/glare of the sun as well ?

Thu Jan 26, 2012 1:22 am » by **Fatdogmendoza**

housefull wrote:Cheers fatdogmendoza. Would/could you get the same thing in the flare/glare of the sun as well ?

The Sun is so bright - that if a camera exposes for the Sun, then everything else in the picture will just be black.
If the camera exposes in such a way that some detail appears in the image - like it has in the video - then the Sun is so bright that it 'overloads' the light sensitive chip in the camera - and in many cameras, hence the black spot.
The same principle applies to many video cameras too - in fact any digital camera (one that uses a light-sensitive chip, instead of film) can show this effect.
The same effect can sometimes happen to the light-sensitive cells in the human eye - and some people who have taken such photos have reported that they could also 'see' the black-spot.
Im no expert on photography but if Im wrong Im sure one of our photographic experts will put me right