What is this reflection coming from my lens?? at DVinfo.net

Al Wong · December 8th, 2014, 02:21 AM

Hey guys. I need a bit of help here. I picked up an older Canon 28-70L 2.8 from Craigslist back a couple of months ago for wedding videography. Last week I finally had a chance to use it, but when I got home I noticed that there seemed to be a lot of reflections from light sources in my footage. At first I thought it could of been the UV filter, but tonight I went out to shoot an engagement video, and without the UV filter it was still giving me the same results. The second picture clearly shows the reflection of the lights from the carousel. It's really worrying me now as a I have a few weddings coming up in January. Does anyone know what the problem is???

D.R. Gates · December 8th, 2014, 04:15 AM

Usually you'll see that with lower quality filters.

Paul Ekert · December 8th, 2014, 05:15 AM

Could it be a reflection from the inside of a lens hood?

Al Wong · December 8th, 2014, 05:59 AM

Quote:

Originally Posted by D.R. Gates

Usually you'll see that with lower quality filters.

I did have a filter on the pic at the church, but the second pic was without a UV filter. I went home, aimed my camera at a light, and it did seem to be worse with a UV filter on, but I'm wondering why I was still picking up a reflection tonight from the carousel without a filter on.

Quote:

Originally Posted by Paul Ekert

Could it be a reflection from the inside of a lens hood?

Hmmmm.. Never thought of that. I'll give that a try. Thanks.

Paul Ekert · December 8th, 2014, 08:17 AM

Might be worth checking, but it is a long shot to be honest. Only ever seen a lens hood reflect like that (against christmas tree lights) and it was a cheap third party one that had this odd bit of gloss on the inside, presumably where the buffer thing that gives it a rough surface had missed contact. If you see what I mean.

James Manford · December 8th, 2014, 09:13 AM

My 35-105mm F3.5 Constant Canon FD lens used to give similar reflections.

I never pin pointed what it was, I just changed glass.

Jeff Cook · December 8th, 2014, 01:24 PM

If you were opened all the way on your lens, that could result to this effect. I have had times like this and I iris down and it was better.

Al Wong · December 9th, 2014, 01:19 AM

Thanks for the responses guys. I think I'm going to have to sell this lens and get something else.

December 8th, 2014, 02:21 AM	#1
Al Wong Regular Crew Join Date: Jun 2014 Location: Vancouver, Canada Posts: 27	What is this reflection coming from my lens?? Hey guys. I need a bit of help here. I picked up an older Canon 28-70L 2.8 from Craigslist back a couple of months ago for wedding videography. Last week I finally had a chance to use it, but when I got home I noticed that there seemed to be a lot of reflections from light sources in my footage. At first I thought it could of been the UV filter, but tonight I went out to shoot an engagement video, and without the UV filter it was still giving me the same results. The second picture clearly shows the reflection of the lights from the carousel. It's really worrying me now as a I have a few weddings coming up in January. Does anyone know what the problem is??? Attached Thumbnails

December 8th, 2014, 04:15 AM	#2
D.R. Gates Regular Crew Join Date: Feb 2009 Location: Bakersfield, CA Posts: 111	Re: What is this reflection coming from my lens?? Usually you'll see that with lower quality filters.

December 8th, 2014, 05:15 AM	#3
Paul Ekert Regular Crew Join Date: Sep 2013 Location: Oxford Posts: 66	Re: What is this reflection coming from my lens?? Could it be a reflection from the inside of a lens hood?

December 8th, 2014, 08:17 AM	#5
Paul Ekert Regular Crew Join Date: Sep 2013 Location: Oxford Posts: 66	Re: What is this reflection coming from my lens?? Might be worth checking, but it is a long shot to be honest. Only ever seen a lens hood reflect like that (against christmas tree lights) and it was a cheap third party one that had this odd bit of gloss on the inside, presumably where the buffer thing that gives it a rough surface had missed contact. If you see what I mean.

December 8th, 2014, 09:13 AM	#6
James Manford Trustee Join Date: Jan 2013 Location: London, UK Posts: 1,393	Re: What is this reflection coming from my lens?? My 35-105mm F3.5 Constant Canon FD lens used to give similar reflections. I never pin pointed what it was, I just changed glass.

December 8th, 2014, 01:24 PM	#7
Jeff Cook Major Player Join Date: Jul 2013 Location: Fresno, Ca Posts: 214	Re: What is this reflection coming from my lens?? If you were opened all the way on your lens, that could result to this effect. I have had times like this and I iris down and it was better.

December 9th, 2014, 01:19 AM	#8
Al Wong Regular Crew Join Date: Jun 2014 Location: Vancouver, Canada Posts: 27	Re: What is this reflection coming from my lens?? Thanks for the responses guys. I think I'm going to have to sell this lens and get something else.