Red problem !

[Brian Cassar]

Originally Posted by Leonard Levy

Tom- Literally 15 seconds with the wanky color adjusting tools in "Preview" on the web create a perfect match on those 2 stills.

Are referring to color correction for the green tint or for the reddish / brown hue due to IR contamination? As far as I know IR contamination could not be colour corrected.

[Alex Raskin]

I just have a slim 486 filter on my EX1 lens all the time, and problem solved.

If you want a cheaper version with front groove, here it is. But I'm unsure if it fits under the hood of the stock lens shade.

[Alister Chapman]

I have a set of high power IR illuminators that I have just purchased for an up coming shoot that will be in total darkness. We are going to be using Sony HC1's for the shoot with the nightshot mode. You can just about see a very faint glow from the lamps with the naked eye. Point the lamps at any subject and then shoot it with an EX and you get nothing at all. Point the EX at the lamps and you see just the very slightest hint of a glow. This suggest some very heavy duty IR filtering does exist on the EX.

[Alex Raskin]

Alister, despite whatever IR filtering already built-in, EX1 is famous for color shift (usually black objects becoming brown) due to IR contamination.

It's very ugly, and I've observed it under both natural sunlight and Fluorescent light sources like Kinoflos.

Solution is to filter out IR properly, and 486 filter (see my post above) helps 100%.

[Alister Chapman]

I'm not saying that it doesn't exist, just that are we sure it really is simply down to poor IR filtration? I have cameras that clearly don't have good IR filtration, point a remote control at them and you can see the IR led flashing away, yet they do not exhibit the colour cast that the EX can. There shouldn't be any IR at all form Kino Flo's and very little from Sunlight compared to the ambient visible light levels. I've seen this brown hue now on many modern HD cameras and it is almost always associated with man made fabrics, normally under tungsten light. I'm not convinced it is just IR that's causing it, you can get some strange effects a certain frequencies and reflected light.

[Steven Thomas]

Originally Posted by Alex Raskin

I just have a slim 486 filter on my EX1 lens all the time, and problem solved.

If you want a cheaper version with front groove, here it is. But I'm unsure if it fits under the hood of the stock lens shade.

Do you have the green shift issue when at the wide end of your lens?

[Bill Heslip]

Originally Posted by Alex Raskin

If you want a cheaper version with front groove, here it is. But I'm unsure if it fits under the hood of the stock lens shade.

Can anyone definitively say that this "non-slim" version will fit with the stock lens shade? I seem to remember that someone said it would, but barely.

[Barry J. Anwender]

Originally Posted by Bill Heslip

Can anyone definitively say that this "non-slim" version will fit with the stock lens shade? I seem to remember that someone said it would, but barely.

I own the 486 Slim and it fits with lots of room behind my EX3 hood. Perhaps, I got lucky but so far I have NOT seen any green cast in my shoots. Sorry, I just re-read your request. I cannot speak for the "non-slim" version.

[Robert St-Onge]

Originally Posted by Bill Heslip

Can anyone definitively say that this "non-slim" version will fit with the stock lens shade? I seem to remember that someone said it would, but barely.

I have the 486 non-slim version and it fits perfectly under the stock lens shade on the EX1.

I also have a Tiffen pro-mist 1/2 and it doesn't fit under the stock lens shade!

[Mark OConnell]

" I've seen this brown hue now on many modern HD cameras and it is almost always associated with man made fabrics, normally under tungsten light. I'm not convinced it is just IR that's causing it, you can get some strange effects a certain frequencies and reflected light.
__________________
Alister Chapman"

I've been getting this consistently (black turning to brown) shooting a collection of tin toys against black fabric with tungsten light. Crushing the blacks makes it go away. Haven't seen it in anything else.

[Bill Heslip]

Originally Posted by Robert St-Onge

I have the 486 non-slim version and it fits perfectly under the stock lens shade on the EX1.

Thanks, Robert. It will be great to rid my shots of burgundy-blacks, and you just save me $57.

[Brian Cassar]

It seems that Rosco has launched a new filter at NAB:

ProVideo Coalition.com: Stunning Good Looks by Art Adams | Cinematography

Eager to see Adam's test on this one......

[Bob Grant]

I bumped into Ryan Avery at the Schneider stand at NAB. They have a new IR cut filter for the EX's. Didn't get too many details from Ryan but this filter is a combination polarizer and IR cut filter which I'm told will prevent the green vignetting. Only saw it in a 4x5.65 size and I didn't get the part number.

[Leonard Levy]

I want a solution for tungstun first, that's where it is a big issue for me.

If they've got a solution, why are they bundling it with a polarizer? That's a special effects filter, not one you can use all the time.

[Bob Grant]

Originally Posted by Leonard Levy

I want a solution for tungstun first, that's where it is a big issue for me.

If they've got a solution, why are they bundling it with a polarizer? That's a special effects filter, not one you can use all the time.

I should probably leave that up to Ryan to answer but I got the impression that by polarizing the light before it enters the dichroic filter the green vignetting was avoided.