Correcting tint with LEE Filters

the 2 photos I reposted above, do NOT have the filter installed
the photo of the Manker Lad 219c is a 4000k led, and the 219b Worm next to it uses a 4500k LED
in the 4 beam photo I reposted (not mine), the third from the left, with the green tint, is what a 5000k 219c looks like. The 5000k 219c is more green than the 4000k 219c, but both are more Yellow than a Nichia 219b that has pink or magenta tint (not all N219b are pink btw)

note Im quoting indigo, you can contact him directly by following the link I posted,
in that thread he posted this picture, below, of a 5000k N219c after adding the minus 1/8 (far right), and compares it to an N219b 4000k, unfiltered (far left)
click the pic to go to that post for more info

Ya, sorry. I just started being lazy and dropped the 4500k 9080 from the 219b. Most of that emitter do have a hint of magenta/rosy as we say. Though some more than others. Thanks for the photo. I’ll do some more reading in the threads you linked.

Just got a Lee Filter #279 and put it in my Emisar D4 with SST20 4000K 95 CRI.

I do wonder if it is going to overheat and melt into my lens and optic. At peak power, the little 24mm circle of film is absorbing close to 600 lumens of light.

However, the D4 won’t sustain turbo for long, and within 30 seconds, absorption is probably down to 100 lumens or less. Still… it’s an offly tiny bit of plastic to absorb such heat.

Don’t use the lee filter over high powered LEDs unless it’s a zircon filter. I don’t think it will straight up melt, but over time probably fade and maybe bubble.

I’ve had a piece of Lee 249 1/4 minus green between the optic and glass of my 219C D4 since December. I run the light on turbo fairly often. No issues yet.

That’s ok.

I have a gigantic sheet of the stuff. Enough for at least a hundred Emisar D4 flashlights. If the filter degrades over time, I’ll just cut another one. :stuck_out_tongue:

Good to know!

I installed a Lee Zircon 805 Minus Green in front of my Noctigon Meteor M43 5000K 219C and it removed the green tint and made it look almost identical to a 5000K Nichia 219B. I was bothered by the green tint, and the filter now made the light much more pleasant to use.

I’ve even put Zircon Minus Green 802 and 803 in front of my high CRI Zebralights. I enjoy using them so much more now and the loss in output is well worth the trade off.

Where’s the best place to get these minus green filters economically? Would anyone be willing to sell a segment of their sheet? I can’t see using more than like a few inches of the stuff, but everywhere I’ve checked on-line so far you have to buy a huge sheet of it (2 feet long). I checked on those filter swatch books that are offered pretty cheap, but it’s a flat rate of $7.50 for shipping and then I’d be stuck with a bunch of filters I’d never use.

I bought the swatch book

.

maybe someone will share a piece of Zircon 804 with you.

more info here about a Zircon 804 with a 5000k N219c

and more about Lee Filters and which one moves tint how much…

Does the default swatch book contain the minus green filters? What are the dimensions of the book?

yes it has the minus green, 1/8, 1/4, 1/2, 1
it also has other filters such as bastard amber 162, marlene #506, amber #775, amber #774, that someone I know mentioned using… so I liked that I could compare what they used, to what I like… I prefer 1/4 minus green… the filters are all marked with the light transmission rate, so you can know how much you are giving up in lumens…

and I have played with some green, and red filters too
I even put a green filter into a plastic bottle cap, that fits over my Novatac and HDS, so I can pop it on and off… all good fun… cheaper than a movie

just do it! LOL!

the swatches are 1.5” by about 3” of useable sample, the book is over 2” thick… there is even diffusion film

what are you wanting to filter?:wink:

Make sure that you buy the Zircon filters if there is any chance at all that they become warm during use (usually when the lens/filter is close to the LED => smaller lights). The standard LEE filters lose their function quickly if they become warm.

maybe true, but did you read this:

at the very least, I recommend the swatch book as a way to test the filters, so xevious can experience them, before spending money on the premium Zircon ones, and so he knows which one he needs, or wants

Search for a photography/theatrical supply store inour area and ask if they stock color correcting filters.
Those big 2-foot square sheets are meant to filter theatrical or photographic lights.

There is another brand — Rosco —- you may find locally.
And ask if they have the filter “sample packs” — which are often sold inexpensively.
Those are little books with 1x1.5-inch strips of each color filter.

PS — the filter packs come out every year; I found suppliers would give me last year’s sample packs free.

Do the various filters, in particular the minus green ones, have a significant impact on CRI?

Usually they raise the CRI by 3-5 points.

thanks, I found the reference

the CRI change depending which filter, is up to 3 points change in CRI Ra, and up to 10 points change in CRI R9

imo no, I do not think the CRI improvement to a Low CRI LED, is significant at all.

these are minus green filters:

they replace green tint with pink tint, at the cost of lumens
but they wont change a Low CRI LED into a High CRI LED

Probably a stupid question, but if you can't get the bezel off, how do you attach the filter? I use dc-fix on some lights but it has adhesive and it's no problem to attach and keep it there and be able to remove it. Does these filters have a similar type of adhesive?

there is no adhesive on Lee Filters

So how do you attach it to the outside of the lens, say to a Zebralight that you can’t open up?