IR filter AND polarizer? at DVinfo.net

Annen James · February 28th, 2011, 08:16 AM

Hello,
I need to use a polarizer for an upcoming water shoot. My EX1 lives with it's IR filter on. Should I stack the filters or drop the IR when using the polarizer? Thanks!

Marcus Durham · February 28th, 2011, 08:53 AM

As a rule the less glass in front of the lens the better.I take my IR off if I require another type of filter.

Duncan Craig · March 1st, 2011, 06:26 AM

Ditto, I don't have the IR on unless I need it.

Annen James · March 1st, 2011, 12:19 PM

When would you not want an IR on? I guess I shoot a lot of people with black shirts, but I never take it off.

Duncan Craig · March 1st, 2011, 02:36 PM

I can film most jobs without it, and unless there's a situation where there are multiple black and the colours are all different I'll leave it off. It loses light too, over a stop I expect.

We shoot in a clothing store a couple of times a month with mixed lighting. Roof fluorescent, some daylight, Arri MSRs and Coollights LEDs and fluorescents.

We watch every shot while setting up, occasionally there's a black fabric that causes the IR problem, but it's quite luckily rare. And it always seems the MSRs are the source which makes it worse, probably because they have such a high CRI whereas the Coollights stuff has less red at source.

Marcus Durham · March 1st, 2011, 03:30 PM

Quote:

Originally Posted by Annen James

When would you not want an IR on? I guess I shoot a lot of people with black shirts, but I never take it off.

It's only blacks where man made fibres are used. It's important to have the IR filter to hand but I only put it on when I need it.

I do however leave a UV filter on at all times (except if I am using another filter). I'd rather scratch or damage that than the EX1 glass.

Malcolm Hamilton · March 1st, 2011, 08:55 PM

Marcus - what UV filter do you use?
thanks, Malcolm

Marcus Durham · March 2nd, 2011, 02:01 AM

Quote:

Originally Posted by Malcolm Hamilton

Marcus - what UV filter do you use?
thanks, Malcolm

It's a Tiffen.

Malcolm Hamilton · March 2nd, 2011, 09:51 AM

Thanks very much. I think I'd better get one (it was on my wishlist, but I'd forgotten until I saw this thread).
Regards, Malcolm

Marcus Durham · March 2nd, 2011, 02:42 PM

You'd be amazed how much crap collects on the UV filter. When you keep in mind that all this would be going onto your expensive lens it's a no-brainer.

But you do need to keep it clean. Very clean. Also watch out for reflections when there are bright light sources.

February 28th, 2011, 08:16 AM	#1
Annen James Regular Crew Join Date: Sep 2009 Location: Ogden Posts: 161	IR filter AND polarizer? Hello, I need to use a polarizer for an upcoming water shoot. My EX1 lives with it's IR filter on. Should I stack the filters or drop the IR when using the polarizer? Thanks!

February 28th, 2011, 08:53 AM	#2
Marcus Durham Major Player Join Date: Jul 2009 Location: Hampshire, UK Posts: 693	Re: IR filter AND polarizer? As a rule the less glass in front of the lens the better.I take my IR off if I require another type of filter. __________________ Marcus Durham Media2u, Corporate Video Production For Your Business - http://www.media2u.co.uk

March 1st, 2011, 06:26 AM	#3
Duncan Craig Major Player Join Date: Jul 2003 Location: Leeds, UK Posts: 660 Images: 10	Re: IR filter AND polarizer? Ditto, I don't have the IR on unless I need it. __________________ FCPX/LS300/EX1/FS100/GoPro/Vinten/HotHead/Jib/Track/Dedos/Lightstorm/Coollights

March 1st, 2011, 12:19 PM	#4
Annen James Regular Crew Join Date: Sep 2009 Location: Ogden Posts: 161	Re: IR filter AND polarizer? When would you not want an IR on? I guess I shoot a lot of people with black shirts, but I never take it off.

March 1st, 2011, 02:36 PM	#5
Duncan Craig Major Player Join Date: Jul 2003 Location: Leeds, UK Posts: 660 Images: 10	Re: IR filter AND polarizer? I can film most jobs without it, and unless there's a situation where there are multiple black and the colours are all different I'll leave it off. It loses light too, over a stop I expect. We shoot in a clothing store a couple of times a month with mixed lighting. Roof fluorescent, some daylight, Arri MSRs and Coollights LEDs and fluorescents. We watch every shot while setting up, occasionally there's a black fabric that causes the IR problem, but it's quite luckily rare. And it always seems the MSRs are the source which makes it worse, probably because they have such a high CRI whereas the Coollights stuff has less red at source. __________________ FCPX/LS300/EX1/FS100/GoPro/Vinten/HotHead/Jib/Track/Dedos/Lightstorm/Coollights

March 1st, 2011, 08:55 PM	#7
Malcolm Hamilton Major Player Join Date: Jan 2007 Location: Ottawa, Canada Posts: 844	Re: IR filter AND polarizer? Marcus - what UV filter do you use? thanks, Malcolm

March 2nd, 2011, 09:51 AM	#9
Malcolm Hamilton Major Player Join Date: Jan 2007 Location: Ottawa, Canada Posts: 844	Re: IR filter AND polarizer? Thanks very much. I think I'd better get one (it was on my wishlist, but I'd forgotten until I saw this thread). Regards, Malcolm

March 2nd, 2011, 02:42 PM	#10
Marcus Durham Major Player Join Date: Jul 2009 Location: Hampshire, UK Posts: 693	Re: IR filter AND polarizer? You'd be amazed how much crap collects on the UV filter. When you keep in mind that all this would be going onto your expensive lens it's a no-brainer. But you do need to keep it clean. Very clean. Also watch out for reflections when there are bright light sources. __________________ Marcus Durham Media2u, Corporate Video Production For Your Business - http://www.media2u.co.uk