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View Full Version : How necessary is an IR reduction filter?



harrisoncj
02-06-2014, 11:08 PM
I'm about to be shooting a project on the BMCC with a fair amount of daytime outdoor shooting. How necessary is it that I have an IR reduction filter? Can I get by without it or is it a must?

Jared Caldwell
02-06-2014, 11:12 PM
Are you using ND? Extreme ND? If so, then I would say the word "necessary" is in the eye of the beholder, but you will DEFINITELY have IR contamination.

harrisoncj
02-06-2014, 11:15 PM
I will be using a good amount of ND. Will that reduce the IR contamination? I'm on a budget so I was considering this filter.
http://www.bhphotovideo.com/c/product/868716-REG/Cavision_FTG4X5_65HM_4_x_5_65_Hot.html

Jared Caldwell
02-07-2014, 01:07 AM
I don't know what else in the chain you're going to have, but a hot mirror on the front will definitely reduce IR. ND filters will just increase the IR/Visible Light ratio, so ND filtration alone actually makes IR contamination worse.

harrisoncj
02-07-2014, 01:23 AM
So would it be best to invest in a set of IRND's? Or just use the hot mirror in conjunction with the ND's that I already own?

kennysule
02-07-2014, 11:22 AM
hot mirror + what you have. I recommend the Schneider Tru Cut 680

scorsesefan
02-08-2014, 03:30 PM
I have not personally found it to be an issue if you use 0.9 ND or below.

CaptainHook
02-09-2014, 10:05 PM
http://www.bmcuser.com/showthread.php?6403-New-Hoya-ProNDs-Rolling-Report-Thread&p=97497&viewfull=1#post97497

Kholi
02-09-2014, 10:39 PM
When the Hoya IR Cut's back in stock, I'll be on to my second one.

It's basically my UV/Protector at this point, no matter where when what how I'm shooting, it never comes off of the lens.

Jared Caldwell
02-09-2014, 11:42 PM
@Captain, for the Tiffen VND, did you have the Hoya IR Cut in front of the VND behind? My Tiffen VND is the 82mm with coarse threads at the front, so it is tough to put anything in front of the VND.

Nick Vega
02-10-2014, 01:23 AM
Ive used a hot mirror before on the BMCC:

https://vimeo.com/67516262

Im using it ocassionally but have also invested in a tiffen irnd 77mm version. I should test out the difference between them in a better fashion.

Might pick up a hoya cut after going through the dedicated thread