fireflies at DVinfo.net

Matt Stahley · September 20th, 2002, 02:27 PM

just to let you guys know i was watching MTV special about streetracing and spotted the dreaded fireflies on almost every night shot that had a street light in it.im almost positive that the main camera was a pd150
(did not see it but the cam was used on previous episodes) and the in car cams were of the sony PC-9 or 110 kind couldnt tell the exact model.

Andre De Clercq · September 21st, 2002, 09:42 AM

Long before OIS was invented the firefly problem was known...They just didn't jump like what you get if the OIS is turned off. Most people believe in putting some glass (UV filter...) in front of the camera optics and keep it there all the time. That's the "best" condition to get the problem when shooting dark scenes with some sharp and bright lightsources. Even good wideband multilayer coatings can't fully suppress this internal lightbouncing. In some cases a wide angle adaptor can reduce this effect.

Mike Rehmus · September 21st, 2002, 06:13 PM

Any volunteers to go out tonight and run an exhaustive test on this subject?

Jeff Donald · September 21st, 2002, 06:25 PM

I've done the tests. I've used different brands of filters, different lenses, no filters and the wrong camera for you guys (XL1s). But I'll post my results here on the firefly thread either tomorrow or Monday. I just haven't had time to finish writing it.

Jeff

September 20th, 2002, 02:27 PM	#1
Matt Stahley Major Player Join Date: Jun 2002 Location: Waynesboro, PA Posts: 648	fireflies just to let you guys know i was watching MTV special about streetracing and spotted the dreaded fireflies on almost every night shot that had a street light in it.im almost positive that the main camera was a pd150 (did not see it but the cam was used on previous episodes) and the in car cams were of the sony PC-9 or 110 kind couldnt tell the exact model.

September 21st, 2002, 06:13 PM	#3
Mike Rehmus Wrangler Join Date: May 2002 Location: Vallejo, California Posts: 4,049	Any volunteers to go out tonight and run an exhaustive test on this subject? __________________ Mike Rehmus Hey, I can see the carrot at the end of the tunnel!

September 21st, 2002, 09:42 AM	#2
Andre De Clercq Major Player Join Date: Sep 2002 Location: Belgium Posts: 804	Long before OIS was invented the firefly problem was known...They just didn't jump like what you get if the OIS is turned off. Most people believe in putting some glass (UV filter...) in front of the camera optics and keep it there all the time. That's the "best" condition to get the problem when shooting dark scenes with some sharp and bright lightsources. Even good wideband multilayer coatings can't fully suppress this internal lightbouncing. In some cases a wide angle adaptor can reduce this effect.

September 21st, 2002, 06:25 PM	#4
Jeff Donald Warden Join Date: Mar 2002 Location: Clearwater, FL Posts: 8,287	I've done the tests. I've used different brands of filters, different lenses, no filters and the wrong camera for you guys (XL1s). But I'll post my results here on the firefly thread either tomorrow or Monday. I just haven't had time to finish writing it. Jeff