Filter for IR contamination

Bill Heslip · April 10th, 2009, 06:05 AM

Quote:

Originally Posted by Krikor Djevahirdjian

Does anyone know the difference between the B+W 77mm 486 UV/IR Slim and the B+W 77mm 486 UV/IR? One is Slim and the other one is not.... but my question is does the not Slim model fit in the EX1 with the hood on?

Yes, it does.

Ronn Kilby · May 28th, 2009, 09:53 AM

Quote:

Originally Posted by Ryan Avery

Let me set the record straight as it stands right now:

I must make it abundently clear that the True-Cut IR 750 is the best solution for the RED camera and any RED user should buy that filter for their camera if using heavy ND filters. The application of the True-Cut IR 750 is only less than ideal for Sony EX users (but does work in some shooting conditions!).

Your patience is appreciated and we are likely to have a workable solution soon.

Ryan Avery
Schneider Optics

Hey Ryan - how's that "workable solution" coming?

Leonard Levy · May 28th, 2009, 03:01 PM

Art Adams and I, together with Robert Orlando from Tiffen just completed some tests of Tiffen's prototype dye based IR filter for Tungstun on the EX-1. Actually it might be more accurate to say its a filter for "far red" problems rather than just IR, but I'll avoid that complexity.

I am extremely happy to report that Tiffen has appeared to completely solve this problem.

The prototype is slightly green so requires a white balance, but it completely solves red in black materials under tungstun or daylight and regardless of how much ND you shoot with. One filter solves all.

This was only the prototype and I don't know how soon it will be in commercial production. The final version I expect may be even make us happier.

Thanks and kudos to the engineering team at Tiffen.

Lenny Levy

Dave Morrison · May 28th, 2009, 03:10 PM

Good news, Lenny. One question that I've been meaning to ask: When reference is made to ND filters used in conjunction with this (or any) IR filter, are you strictly speaking about "external" ND filters stacked under the IR filter OR does this apply to the internal ND filters in the Sony? Sorry for the "duhhh" question, but this has always been fuzzy for me.

Marlon Martins · May 28th, 2009, 03:10 PM

any test under halogen light? ;)

Brian Cassar · May 28th, 2009, 03:17 PM

Leonard, what about the loss of light induced by this filter? Is it still about half a stop? Or did Tiffen manage to reduce it?

Leonard Levy · May 28th, 2009, 05:25 PM

external or internal ND's - same
Yes 1/2 stop , but who knows what the final version will be.

Alex Raskin · May 28th, 2009, 06:32 PM

Leonard, does Tiffen's filter produce a green halo around the edges of the frame at the wide end of the lens? (B+W does a bit).

Leonard Levy · May 28th, 2009, 08:19 PM

Quote:

Originally Posted by Alex Raskin

Leonard, does Tiffen's filter produce a green halo around the edges of the frame at the wide end of the lens? (B+W does a bit).

No, That is the significance of a dye based filter.

Ed Kukla · May 28th, 2009, 08:28 PM

Thanks Leonard, Good news

I'm anxiously awaiting to pay $50 for this in 4X4 :)

Dave Morrison · May 28th, 2009, 08:32 PM

Maybe Ryan will take back my 486? ;-)

Derek Reich · May 28th, 2009, 10:50 PM

Leonard,
I'm still a little confused.... I have understood that the Tiffen IRND filters had a specific amount of dye based on the ND level of the filter.
If the new Tiffen filter coming out without ND works with regular (non-IRND) ND filters, why is it that the IRND filters could not be combined with regular ND filters before? Is this a totally new approach?
Art says in his article that the Tiffen filter can only be used with IRND ND filters, but that it surprisingly did appear to work with the internal NDs in the camera which baffled him. He says it shouldn't work like that....

I continue to be baffled.....

Leonard Levy · May 29th, 2009, 01:33 AM

Is this a totally new approach?

Yes.

We've been looking at lots of filters with the EX-1 and much of what Art initially said was based on assuming it was similar to other Sony's. We found though that the Tiffen IRND's had no effect on the EX-1 .

This whole business has been confusing and each camera has been different.

The new Tiffen filter seems to work extremely well and simplifies the issue on the Ex-1 . I'm not sure yet what role it play with other cameras. I hope they come out with a production version soon.

Piotr Wozniacki · May 29th, 2009, 03:48 AM

Lenny,

Are Tiffen going to supply it as a screw-on, or 4x5.25", or both?

Derek Reich · May 29th, 2009, 08:01 AM

Quote:

Originally Posted by Leonard Levy

Is this a totally new approach?

Yes.

We've been looking at lots of filters with the EX-1 and much of what Art initially said was based on assuming it was similar to other Sony's. We found though that the Tiffen IRND's had no effect on the EX-1 .

This whole business has been confusing and each camera has been different.

The new Tiffen filter seems to work extremely well and simplifies the issue on the Ex-1 . I'm not sure yet what role it play with other cameras. I hope they come out with a production version soon.

I'll eagerly await the release..... this truly does sound like the 'holy grail' of filters if it can indeed be used with regular NDs!

May 28th, 2009, 03:10 PM	#184
Dave Morrison Major Player Join Date: May 2002 Location: West Central Florida Posts: 762	Good news, Lenny. One question that I've been meaning to ask: When reference is made to ND filters used in conjunction with this (or any) IR filter, are you strictly speaking about "external" ND filters stacked under the IR filter OR does this apply to the internal ND filters in the Sony? Sorry for the "duhhh" question, but this has always been fuzzy for me. __________________ EX1, Nikon D750 http://www.morrisonphotographics.com http://www.heritagefilm.com

May 28th, 2009, 08:32 PM	#191
Dave Morrison Major Player Join Date: May 2002 Location: West Central Florida Posts: 762	Maybe Ryan will take back my 486? ;-) __________________ EX1, Nikon D750 http://www.morrisonphotographics.com http://www.heritagefilm.com

May 28th, 2009, 10:50 PM	#192
Derek Reich Major Player Join Date: Dec 2008 Location: Washoe Valley, NV Posts: 304	Leonard, I'm still a little confused.... I have understood that the Tiffen IRND filters had a specific amount of dye based on the ND level of the filter. If the new Tiffen filter coming out without ND works with regular (non-IRND) ND filters, why is it that the IRND filters could not be combined with regular ND filters before? Is this a totally new approach? Art says in his article that the Tiffen filter can only be used with IRND ND filters, but that it surprisingly did appear to work with the internal NDs in the camera which baffled him. He says it shouldn't work like that.... I continue to be baffled..... __________________ www.zooprax.com

May 29th, 2009, 03:48 AM	#194
Piotr Wozniacki Inner Circle Join Date: Aug 2006 Location: Poland Posts: 4,086	Lenny, Are Tiffen going to supply it as a screw-on, or 4x5.25", or both? __________________ Sony PXW-FS7 \| DaVinci Resolve Studio; Magix Vegas Pro; i7-5960X CPU; 64 GB RAM; 2x GTX 1080 8GB GPU; Decklink 4K Extreme 12G; 4x 3TB WD Black in RAID 0; 1TB M.2 NVMe cache drive

May 28th, 2009, 03:01 PM	#183
Leonard Levy Trustee Join Date: Feb 2006 Location: USA Posts: 1,684	Art Adams and I, together with Robert Orlando from Tiffen just completed some tests of Tiffen's prototype dye based IR filter for Tungstun on the EX-1. Actually it might be more accurate to say its a filter for "far red" problems rather than just IR, but I'll avoid that complexity. I am extremely happy to report that Tiffen has appeared to completely solve this problem. The prototype is slightly green so requires a white balance, but it completely solves red in black materials under tungstun or daylight and regardless of how much ND you shoot with. One filter solves all. This was only the prototype and I don't know how soon it will be in commercial production. The final version I expect may be even make us happier. Thanks and kudos to the engineering team at Tiffen. Lenny Levy

May 28th, 2009, 03:10 PM	#185
Marlon Martins Regular Crew Join Date: Apr 2008 Location: Torres, Brazil Posts: 115	any test under halogen light? ;)

May 28th, 2009, 03:17 PM	#186
Brian Cassar Major Player Join Date: Jan 2007 Location: Malta Posts: 306	Leonard, what about the loss of light induced by this filter? Is it still about half a stop? Or did Tiffen manage to reduce it?

May 28th, 2009, 05:25 PM	#187
Leonard Levy Trustee Join Date: Feb 2006 Location: USA Posts: 1,684	external or internal ND's - same Yes 1/2 stop , but who knows what the final version will be.

May 28th, 2009, 06:32 PM	#188
Alex Raskin Trustee Join Date: Sep 2003 Posts: 1,435	Leonard, does Tiffen's filter produce a green halo around the edges of the frame at the wide end of the lens? (B+W does a bit).

May 28th, 2009, 08:28 PM	#190
Ed Kukla Major Player Join Date: Mar 2008 Location: All over, USA Posts: 512	Thanks Leonard, Good news I'm anxiously awaiting to pay $50 for this in 4X4 :)

May 29th, 2009, 01:33 AM	#193
Leonard Levy Trustee Join Date: Feb 2006 Location: USA Posts: 1,684	Is this a totally new approach? Yes. We've been looking at lots of filters with the EX-1 and much of what Art initially said was based on assuming it was similar to other Sony's. We found though that the Tiffen IRND's had no effect on the EX-1 . This whole business has been confusing and each camera has been different. The new Tiffen filter seems to work extremely well and simplifies the issue on the Ex-1 . I'm not sure yet what role it play with other cameras. I hope they come out with a production version soon.