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Home: Video University Forums: Canon All Camcorders:
Dancing lights

X-Gary_Cox
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May 28, 2004, 9:48 AM

Post #1 of 3 (880 views)
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Dancing lights	Can't Post

Has anyone had a problem on a GL1 or GL2 while filming in low light that any lights (candles, street lights etc...) often have what looks like dancing fire flys around them?
The problem seems to be the UV filter I have on the camera as I try to keep the filter on all the time to protect the real camera lens but removing the UV filter usually takes that effect away.
Is there a way I can have a filter on for protection and not have this firefly effect?
I'm not sure what it is doing unless it is double reflecting between the lens and the uv filter and you see it in low light conditions but bright conditions over ride any of that?
... Gary

X-don
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May 30, 2004, 6:25 PM

Post #2 of 3 (878 views)
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Re: Dancing lights	Can't Post

: Has anyone had a problem on a GL1 or GL2 while filming in low light that any lights (candles, street lights etc...) often have what looks like dancing fire flys around them?
The light is probably reflections from the glass-air surfaces. Will be worse the more glass, especially non-coated glass, you add to the light path. Thus only use high quality filters, and only when needed for the shoot. Low light/dark backgrounds makes it worse because the points of light are a very hot spots relatively to the background and even a small reflection of a hot spot is visible against a dim background.
Dancing is probably due to OIS (image stabilizer) activity. Turn the OIS off and the dancing should reduce significantly.

X-Gary_Cox
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Jun 1, 2004, 9:19 AM

Post #3 of 3 (875 views)
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Re: Dancing lights [In reply to]	Can't Post

I probably should just remove the filter but I didn't think of turning off the image stabilizer... I'll try that. I like keeping the filter on to protect the real lens but I may have to compromise in low light...
Thanks... Gary

: : Has anyone had a problem on a GL1 or GL2 while filming in low light that any lights (candles, street lights etc...) often have what looks like dancing fire flys around them?
: The light is probably reflections from the glass-air surfaces. Will be worse the more glass, especially non-coated glass, you add to the light path. Thus only use high quality filters, and only when needed for the shoot. Low light/dark backgrounds makes it worse because the points of light are a very hot spots relatively to the background and even a small reflection of a hot spot is visible against a dim background.
: Dancing is probably due to OIS (image stabilizer) activity. Turn the OIS off and the dancing should reduce significantly.