Tiffen ND IR Color Shift

Hey guys
I got Tiffen ND IR 1.2 and 2.1 filters, as suggested for BMCC, although specs for filters say "no color shift" its clearly there. For 2.1 its greenish while 1.2 looking more pleasant and its to magenta side. Shooting with same filter would NOT be huge issue but when i switch em due to a lighting changes they get me different colored shots on the same lens, that kinda challenging to match in post.

Do you have any experience/tests through this ND IR range?

EDITED:)

[CaptainHook]

I only have Tiffen IR ND 0.3-1.5 but i would expect a colour shift along the range regardless. Especially at 2.1.

Hey guys
I got Tiffen ND IR 1.2 and 2.1 filters, as suggested for BMCC, although specs for filters say "no color shift" its clearly there. For 2.1 its greenish while 1.2 looking more pleasant and its to magenta side. Shooting with same filter would be huge issue but when i switch em due to a lighting changes they get me different colored shots on the same lens, that kinda challenging to match in post.

Do you have any experience/tests through this ND IR range?

No filter is ever truly neutral and there is always some degree of shift in colour.

jb

Thanks John!
So do you say its normal/expected different color shift from same line of filters, just different strengths?
Appreciate your input!;)

Thanks John!
So do you say its normal/expected different color shift from same line of filters, just different strengths?
Appreciate your input!;)

YEah even within the same brand and the same strength.

I often in testing try to get *matching ND filters for the cameras that are designated to go with that camera so they *shift* by the same amount.

With very heavy ND's it's almost a certainty that there will be a shift of some kind.

jb

Would some grey card shot in the beginning help decently in the post ?

What i mean if you know your nd shifts and you try to "record" the amount of the shift with
gray card so you could reference it in post would that help?

Would some grey card shot in the beginning help decently in the post ? What i mean if you know your nd shifts and you try to "record" the amount of the shift with gray card so you could reference it in post would that help?

I would think so.

On a related note, here's info about the SMPTE "OneShot" color/gray chart:
http://store.smpte.org/SearchResults.as ... mit=Search

-

Would some grey card shot in the beginning help decently in the post ?

What i mean if you know your nd shifts and you try to "record" the amount of the shift with
gray card so you could reference it in post would that help?

Thatd make sence. But I'm shooting feature doc rungun alot, struggling changing filters from sun to shade, shooting card before each shot ll not b practical.
What I just thought now is to shoot card before the actuall shooting,in similar lighting(my day mostly in blazing sun here;) and then use it as a reference. I'll try that:)

yes that is what i meant.

the idea is to get neutral starting point for balance or auto balance in resolve for example.

I assume you shoot in prorez?

Oh yeah I shoot prores of course,50 days average 4hrs simply not affordable. This Prores is amaizing after 60d.

Oh yes it is

Thatd make sence. But I'm shooting feature doc rungun alot, struggling changing filters from sun to shade, shooting card before each shot ll not b practical.
)

Using a variND with a nearIR on top would be much more practical and precise for this situations IMHO.
Also you minimize color shift that way - I get close to non shift out of this setup.
Genus or Heliopan variND and a Heliopan nearIR (which they oddly call "digitalfilter").

Using a variND with a nearIR on top would be much more practical and precise for this situations IMHO.

Frank do you know if it matters if the ir filter is in front or behind the varial-nd filter?

thanks

Thanks Frank!
From your experience would you say these two are similar quality wise? As they are world appart price wise Besides color issue,any sharpness loss? X image?
I concidered expencive varynd but amount of bad reviews kept me back, so I got few tiffens. I bought the cheapest Polaroid varynd also just for the heck,to try out but raaarely use it
Of course vary nd d be best solution if they'd just be as good as regular, I'd pay big money probably as its better then inbuilt nd IMHO

I came across similar findings on color shifts, but the hot mirrors hold the colors well.

Documented my findings here:

Frank do you know if it matters if the ir filter is in front or behind the varial-nd filter?

Can't see any difference.

Thanks Frank!
From your experience would you say these two are similar quality wise? As they are world appart price wise Besides color issue,any sharpness loss? X image?
I concidered expencive varynd but amount of bad reviews kept me back, so I got few tiffens. I bought the cheapest Polaroid varynd also just for the heck,to try out but raaarely use it
Of course vary nd d be best solution if they'd just be as good as regular, I'd pay big money probably as its better then inbuilt nd IMHO

Genus and Heliopan are the only varND that I have tried, that hold sharpness over the range and op to 280mm glass pretty well. The X appears only when you dial a variND out of its range.

Have a look http://frankglencairn.wordpress.com/201 ... s-eclipse/

I wonder if there is online shop in EU that you trust on Helio?

Here you go: http://www.fotomayr.de/webkat98/index_fi.htm

A little side note: Compared to all other varNDs I tried, the Heliopan is the only one, that doesn't do polarizing. I have no idea how they managed that, but that's how it is.

Are those the same items ?

http://www.digitalrev.com/product/helio ... MjAyMQ_A_A

http://www.fotomayr.de/webkat98/index_fi.htm


Price difference 264 €

I have to cancel my digitalrev order.

I also wonder if that is the one you were talking as digital filter?

http://www.fotomayr.de/webkat98/index_fi.htm

Can't see it cause the website always jumps back to the default filter selector, but the IR filter is called Heliopan Digitalfilter Filter TYP 8025. And yeah, those are the same variND filters.

There are two versions - one (called "slim") that has only one side treaded and the normal one with treads on both sides.

Screen Shot 2013-07-02 at 9.36.28 AM.png (24.61 KiB) Viewed 6539 times

Screen Shot 2013-07-02 at 9.35.36 AM.png (36.04 KiB) Viewed 6539 times

This is the one i ordered but will cancel probably for the price difference.

digitalrev

Screen Shot 2013-07-02 at 9.36.49 AM.png (52.45 KiB) Viewed 6539 times

Yes, yes and yes

I'm always shocked, what kind of profit they pull from Heliopan products in other countries.

There is seldom some benefit, living in Germany, but when it comes to beer, sausage and buying Heliopan filters.....

I owe you a beer now

will see if i can cancel my expensive order.

i have also noticed that some EU shops have some kind of optics
also a bit cheaper compared to HK store.

As a mater of fact, you owe my like 200 beers

Yes i figured beer is dirt cheap there

But i hope we meet someday and i would be happy to buy some beer.

Maybe you can trade in some of those beers for sausages, or even better: brezeln!

Hey,

i want to buy a Filter UV/IR http://www.fotofilterversand.de/fofilter/ for my new Lens 20mm.

so the size of my lens is 67mm...do i buy the filter in 67mm or will there be probs due to the 20mm wide...i tho i heard that it will be better to use a 77mm filter and adapt it via to the 67mm lens.

could you give me advice on this one....

thanks!

Buy a 77 and a step-up ring so you are on the safe side for future glass.

I just talked to Meyer and he said , that with a 2,* Crop it wont be a prob on that 20mm.
He is really a nice guy , very handy, he told me also that they will return when there will be any probz with it and that the Tiffen Filter is really hard to get around here.

Ill try that UV/IR...for now.

thanks!

Frank do you know if it matters if the ir filter is in front or behind the varial-nd filter?
thanks

IR at the front (nearest the subject you are shooting). Always.

Care to explain?

As I said, I can't see any difference.

Like Frank I've not seen any difference.

I run a Hoya IR filter on the lens then the Genus Fader ND on the IR filter.

Here is a test I did earlier this year:
viewtopic.php?p=47657#p47657

It only matters with IR mirror filters, which can cause nasty reflections if not at the front.

Plus, they serve the actors to check their makeup too

It only matters with IR mirror filters, which can cause nasty reflections if not at the front.

Plus, they serve the actors to check their makeup too

???????

Hot (Infra-Red) Mirror (reflective)

i.e. a filter that reflects infra-red light.

It's not something you can use to check your hair in.

Hi, check out TrueND by Mitomo, apparently they have the most even color cast across range

article found by typing the following "art adams One Set of ND Filters to Rule Them All?" into search engine

I am soon going to purchase a bmcc 2.5k and have been driving myself nuts trying to research an IR pollution solution. I really don't want to be swapping ND filters left right and center so I am considering VARND of some sort with hot mirror.

Nick Pitt
Sydney Australia
(future bmcc owner)