Why Filmmakers Should Worry About Infrared Light
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Date: 2022-09-13
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Comments and reviews: 20
Thomas
Obviously, most people aren't going to run out and buy a set of Tiffen NAT filters. The less expensive option (though good ones are still expensive) is to get a stand-alone IR cut filter to use with regular ND filters. One issue you'll see when looking for IR filters is that there are IR cut filters (which is what we are talking about here) and there are IR photography filters. Filters for IR photography are the opposite of what you want - they cut visible light and only let through a specific wavelength of IR light. (IR photography is a really cool effect! But not useful for everyday shooting) Once you're aware of the distinction, it will be pretty obvious which filters are IR cut versus for IR photography.
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Obviously, most people aren't going to run out and buy a set of Tiffen NAT filters. The less expensive option (though good ones are still expensive) is to get a stand-alone IR cut filter to use with regular ND filters. One issue you'll see when looking for IR filters is that there are IR cut filters (which is what we are talking about here) and there are IR photography filters. Filters for IR photography are the opposite of what you want - they cut visible light and only let through a specific wavelength of IR light. (IR photography is a really cool effect! But not useful for everyday shooting) Once you're aware of the distinction, it will be pretty obvious which filters are IR cut versus for IR photography.
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Francisco
NO. WRONG. Even thou IR light exists and digital sensors ate very sensible to it, basically all digital cameras have an IR filter. Ask any IR photographer and you'll know how hard it is to do IR photography on digital cameras, including quimicly or fisically having to remove said IR filter.
The examples are most likely from the use of NDs filters, which usually affect color rendition, and not an IR filter.
YOU DON'T NEED AN IR FILTER. Anyway, its easy to prove by yourself with your camera, so do the tests and see.
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NO. WRONG. Even thou IR light exists and digital sensors ate very sensible to it, basically all digital cameras have an IR filter. Ask any IR photographer and you'll know how hard it is to do IR photography on digital cameras, including quimicly or fisically having to remove said IR filter.
The examples are most likely from the use of NDs filters, which usually affect color rendition, and not an IR filter.
YOU DON'T NEED AN IR FILTER. Anyway, its easy to prove by yourself with your camera, so do the tests and see.
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Frontigenics
Yes, just shoot film, thanks Mr. Elitist! Because filmmaking should be reserved for those who can pay 100's-of-thousands of dollars and go through your commissar door-holding guilds. Just like the good 'ol days, right? Why would you want any of these great affordable camera that can be operated by a crew of only a few people? We all know it's not real filmmaking unless you hold studios hostage and use union bully tactics to make sure 12 of your friends are being paid $2500 a day to do a 1 person job.
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Yes, just shoot film, thanks Mr. Elitist! Because filmmaking should be reserved for those who can pay 100's-of-thousands of dollars and go through your commissar door-holding guilds. Just like the good 'ol days, right? Why would you want any of these great affordable camera that can be operated by a crew of only a few people? We all know it's not real filmmaking unless you hold studios hostage and use union bully tactics to make sure 12 of your friends are being paid $2500 a day to do a 1 person job.
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Kent
iirc the earth does not receive a lot of infrared light from the sun in comparison to the visible spectrum. However, things on planet earth will absorb shortwave radiation and reradiate it as infrared (which is probably why they mentioned seeing infra red on cloudy days. All things radiate electromagnetic radiation, and the usual temperature of the earth puts it in the infrared spectrum. I don't really know how sensitive cameras are for this, but letting you know that theres no escaping it.
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iirc the earth does not receive a lot of infrared light from the sun in comparison to the visible spectrum. However, things on planet earth will absorb shortwave radiation and reradiate it as infrared (which is probably why they mentioned seeing infra red on cloudy days. All things radiate electromagnetic radiation, and the usual temperature of the earth puts it in the infrared spectrum. I don't really know how sensitive cameras are for this, but letting you know that theres no escaping it.
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Leon
Fix it in Post is a phrase that's hated for a reason. BUT.
While I try to get as much as I can in-camera, it does help to have the flexibility to do what you need to do in post. Sometimes it can be important to relax and remember that things can be fixed in post if trying to get it in camera is killing your time and brain cells on set.
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Fix it in Post is a phrase that's hated for a reason. BUT.
While I try to get as much as I can in-camera, it does help to have the flexibility to do what you need to do in post. Sometimes it can be important to relax and remember that things can be fixed in post if trying to get it in camera is killing your time and brain cells on set.
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Astral'o
Where are all the people that were bragging about BMPCC4K's low price in comparison to its competitors (GH5, A7III etc? It does have the best image quality in its class, but the cost doubles instantly because of the gear it demands to be used efficiently (monitor, SSD, batteries, EXPENSIVE ND Filters, very powerful PC etc.
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Where are all the people that were bragging about BMPCC4K's low price in comparison to its competitors (GH5, A7III etc? It does have the best image quality in its class, but the cost doubles instantly because of the gear it demands to be used efficiently (monitor, SSD, batteries, EXPENSIVE ND Filters, very powerful PC etc.
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eLNeroDiablo
This was a really interesting subject that I'm glad you guys talked about, as it shows some of the sort of work that camera crews and operators need to go through for both small indie films and big blockbusters to get a quality base product before going in and doing editing and other work in Post.
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This was a really interesting subject that I'm glad you guys talked about, as it shows some of the sort of work that camera crews and operators need to go through for both small indie films and big blockbusters to get a quality base product before going in and doing editing and other work in Post.
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antonarap
Horrible! So you will have bring down magentas Davinci. These old DPs like to think the are doing everything by themselves, no color grading. That old fart's ego the issue, not IR. Anyway al cinema cameras have filters. I have a preference for glass in front of the lens. Clown.
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Horrible! So you will have bring down magentas Davinci. These old DPs like to think the are doing everything by themselves, no color grading. That old fart's ego the issue, not IR. Anyway al cinema cameras have filters. I have a preference for glass in front of the lens. Clown.
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Noah
Had this exact issue on a recent shoot I worked on. They thankfully saw their mistake about a half-day in but were unable to reshoot. Final cut has a handful of unfortunately polluted shots. Test you cameras, your filters, your lights. Test everything!
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Had this exact issue on a recent shoot I worked on. They thankfully saw their mistake about a half-day in but were unable to reshoot. Final cut has a handful of unfortunately polluted shots. Test you cameras, your filters, your lights. Test everything!
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Jonas
Ran into this issue late 2019. The cinematographer was shooting on Amira and forgot to put in an IR filter, outdoor on a very sunny day. Grading the footage so that black products would look black and not violet red was a real pain for both of us.
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Ran into this issue late 2019. The cinematographer was shooting on Amira and forgot to put in an IR filter, outdoor on a very sunny day. Grading the footage so that black products would look black and not violet red was a real pain for both of us.
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Coastfog
You folks have communicated some serious knowledge lately, thanks for that! I earn my bread with video production but since I don't have a classical education, there's still so much to learn, quite humbling really.
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You folks have communicated some serious knowledge lately, thanks for that! I earn my bread with video production but since I don't have a classical education, there's still so much to learn, quite humbling really.
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Phillip
This is informative but I feel like some of the b-roll didn't make sense. I couldn't tell if it was supposed to illustrate an example of IR pollution in a specific instance, or if it was for dramatic effect
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This is informative but I feel like some of the b-roll didn't make sense. I couldn't tell if it was supposed to illustrate an example of IR pollution in a specific instance, or if it was for dramatic effect
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Don
'Fix it in Post' is the dirtiest phrase invented by man. TRUTH! Get it right in camera! Richard Crudo - a trustworthy mentor! Thanks for sharing your expertise! Nice segment y'all.
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'Fix it in Post' is the dirtiest phrase invented by man. TRUTH! Get it right in camera! Richard Crudo - a trustworthy mentor! Thanks for sharing your expertise! Nice segment y'all.
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Dam
Great video and I learned a lot.
But the bass on your voice was so much overkill it just sounds unnatural. IMO. Why nit capture voice as naturally as you try to capture video?
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Great video and I learned a lot.
But the bass on your voice was so much overkill it just sounds unnatural. IMO. Why nit capture voice as naturally as you try to capture video?
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Marc
So should we trust the internal NDs within the alexa mini? Cause in my country if we wanna do a test before the shoot we will have to pay the rental company in order to do a test.
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So should we trust the internal NDs within the alexa mini? Cause in my country if we wanna do a test before the shoot we will have to pay the rental company in order to do a test.
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Alex
This explains why the old Sony F series from early 2000s of digital cameras had a green tinting issue. They had an imbedded IR sensor too. They forgot the ND filter.
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This explains why the old Sony F series from early 2000s of digital cameras had a green tinting issue. They had an imbedded IR sensor too. They forgot the ND filter.
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S0MEYAH00
if you want to see if your camera sees IR light, point your TV remote at it, and press a button. If you see the LED in the remote flash, you're seeing IR.
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if you want to see if your camera sees IR light, point your TV remote at it, and press a button. If you see the LED in the remote flash, you're seeing IR.
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Sergio
Wow, thanks for this. I own the bmpcc4k and as much as I love this camera, I knew there was something with it but I just couldn't put my finger on it!
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Wow, thanks for this. I own the bmpcc4k and as much as I love this camera, I knew there was something with it but I just couldn't put my finger on it!
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Marcus
They are in steps of 0. 3 because they are in a log scale. log(2)= 0. 3 log(4)= 0. 6 log (8) =0. 9 and so on. Log(1/2)= -0. 3 etc etc
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They are in steps of 0. 3 because they are in a log scale. log(2)= 0. 3 log(4)= 0. 6 log (8) =0. 9 and so on. Log(1/2)= -0. 3 etc etc
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Ariana
if you point your ir remote toward your camera you will see a flash of light if the camera does not have an ir filter.
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if you point your ir remote toward your camera you will see a flash of light if the camera does not have an ir filter.
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