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Author Topic: Wanted: Lens Filter to Correct Red Shift
Janice Glesser
Film Goddess

Posts: 3468
From: Sunnyvale, CA USA
Registered: Sep 2011


 - posted July 30, 2016 04:11 PM      Profile for Janice Glesser     Send New Private Message       Edit/Delete Post 
Theoretically yes Dom. I use a 85B (orange filter) on my camcorder when capturing non-faded images from my MovieStuff Telecine Projector. It has an LED lamp that has a blue/green tint and the orange filter does a good job of neutralizing the colors. I guess it just depends on how severe the lamp changes the film color. It may not be significant enough to be noticed.

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Janice

"I'm having a very good day!"
Richard Dreyfuss - Let It Ride (1989).

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John Hermes
Expert Film Handler

Posts: 139
From: La Mesa, CA, USA
Registered: Nov 2008


 - posted July 30, 2016 04:55 PM      Profile for John Hermes     Send New Private Message       Edit/Delete Post 
I've had both Marc 300 and xenon projectors. They do not appreciably help red prints. They put out a bright 5500 degree Kelvin blue-white light which gives a vibrancy to unfaded colors, but really doesn't help red or pink prints very much. I suppose if a film were just starting to shift toward red, xenon could help a bit.

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John Hermes

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Dominique De Bast
Film God

Posts: 4486
From: Brussels, Belgium
Registered: Jun 2013


 - posted July 30, 2016 05:10 PM      Profile for Dominique De Bast   Email Dominique De Bast   Send New Private Message       Edit/Delete Post 
Thanks for both answers. Following what you say, Janice, about the fact that the brighter the lamp is, the best the results are with a filter, a xenon lamp and a filter gives probably the best improvment.

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Dominique

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Steve Klare
Film Guy

Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003


 - posted August 05, 2016 11:33 PM      Profile for Steve Klare   Email Steve Klare   Send New Private Message       Edit/Delete Post 
I tried mine with a black and white film that was printed on red faded color stock.

-pretty good!

Not quite black and white, but something more like sepia tone.

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All I ask is a wide screen and a projector to light her by...

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Mathew James
Jedi Master Film Handler

Posts: 740
From: Hamilton, Ontario, Canada
Registered: Dec 2014


 - posted August 08, 2016 12:35 PM      Profile for Mathew James   Email Mathew James   Send New Private Message       Edit/Delete Post 
good observation Steve,
...speaking of black and white, on red stock, or otherwise...,
I am wondering if there is another filter we can use/add that makes the contrast better on b/w films where the faces have whitened a bit. Is there a way to improve that? What filter colour improves contrast?

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Cheers,
Matt 📽

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Janice Glesser
Film Goddess

Posts: 3468
From: Sunnyvale, CA USA
Registered: Sep 2011


 - posted August 10, 2016 03:55 AM      Profile for Janice Glesser     Send New Private Message       Edit/Delete Post 
Photoshop [Smile]

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Janice

"I'm having a very good day!"
Richard Dreyfuss - Let It Ride (1989).

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Mathew James
Jedi Master Film Handler

Posts: 740
From: Hamilton, Ontario, Canada
Registered: Dec 2014


 - posted August 11, 2016 01:25 PM      Profile for Mathew James   Email Mathew James   Send New Private Message       Edit/Delete Post 
[Smile]
Steve got me thinking more on this and how colour filters can potentially alter a B/W image...I figured maybe someone had tried some different colours to see what could happen to improve contrast.
Although this pertains to photography, this link is interesting in that some have ventured down this path with some interesting results: Coloured filters for B/W Photography
If i had some gels, i would love to experiment further...

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Cheers,
Matt 📽

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Dominique De Bast
Film God

Posts: 4486
From: Brussels, Belgium
Registered: Jun 2013


 - posted September 12, 2016 03:44 PM      Profile for Dominique De Bast   Email Dominique De Bast   Send New Private Message       Edit/Delete Post 
I tested today the filter with two pinkish to redish scopitones and it did work. The picture is improved. I had a sound problem with my 16 mm projector (I use this one seldom, only for magnetic 16 mm films) so I don't know how the filter reacts with very red films but I certainly don't regret my Investment !

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Dominique

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Roger Shunk
Jedi Master Film Handler

Posts: 604
From: Phoenix, AZ
Registered: Nov 2011


 - posted September 13, 2016 10:43 AM      Profile for Roger Shunk   Author's Homepage     Send New Private Message       Edit/Delete Post 
OK count me in on this will order one too since there are so many rave reviews!

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Trevor Massey
Junior
Posts: 10
From: Darlaston, United Kingdom
Registered: Sep 2016


 - posted September 14, 2016 09:12 AM      Profile for Trevor Massey   Email Trevor Massey   Send New Private Message       Edit/Delete Post 
Just tried a cyan filter on a very red film and it works a treat!

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Trevor

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