Jump to content


Photo

Best IR filters to use with RED MX


  • Please log in to reply
4 replies to this topic

#1 Peter Keith

Peter Keith

    New

  • Basic Members
  • Pip
  • 3 posts
  • 1st Assistant Camera

Posted 21 May 2011 - 09:48 AM

I'm about to work on a production using the RED MX. The DP had originally requested combination IRND's but the rental house has been unable to provide these and offered the Tiffen T1 as a good alternative. I've had past experience with the Schneider True-Cut IR hot mirror with the Red and only using it in conjunction with ND.6 or higher. I've been told the Tiffen T1 is better and should be left in all the time even when not using ND. The DP has concerns about this though. I'd really appreciate if anybody can offer advice on the matter! Cheers
  • 0

#2 Peter Keith

Peter Keith

    New

  • Basic Members
  • Pip
  • 3 posts
  • 1st Assistant Camera

Posted 21 May 2011 - 09:52 AM

Just found this:
"The Red One Mysterium X has an internal low-pass filter. This will block out infrared light for about 4 to 5 stops. So you don’t need to add a Hot Mirror or IR filter unless your ND is greater than 1.2 or so."
Is this true!!?
Thanks
  • 0

#3 Dom Jaeger

Dom Jaeger
  • Basic Members
  • PipPipPipPip
  • 1602 posts
  • Other
  • Melbourne, Australia

Posted 23 May 2011 - 01:07 AM

IR and Far-Red filtration is something of a vexed issue at present, with each new digital camera that comes out having a different level of in-built filtration. I understand Tiffen and Schneider are both struggling to meet the new demand for IR and IRND filters, and to provide variations on where in the spectrum they cut in. It doesn't help that while the cameras are getting more sensitive, everyone seems to want to shoot wide open to get a shallow DOF, so they stack NDs. Colour shifts, IR and Far-Red pollution, synthetic materials registering as different colours, and each camera reacting differently - it's a minefield!

By my limited understanding, the Tiffen T1 is a Far-Red filter (680 - 720nm). It was not designed for the RED MX, but for cameras with narrower spectrum internal filters that allow through a certain range of Far-Red, such as Alexa and the various Sonys.

I'm not at all familiar with REDs, but from what I've read I believe the Hot Mirror is a more appropriate IR filter:

www.thelondonfiltercompany.com/filters/pdf/HD_Camera_Filter_Chart.pdf
  • 0

#4 Peter Keith

Peter Keith

    New

  • Basic Members
  • Pip
  • 3 posts
  • 1st Assistant Camera

Posted 23 May 2011 - 03:51 PM

Many thanks for your detailed response. I had a feeling the T1 wasn't intended for red use! Has anyone else had issues with this kind of thing?
  • 0

#5 Stuart Brereton

Stuart Brereton
  • Basic Members
  • PipPipPipPip
  • 3070 posts
  • Cinematographer
  • Los Angeles

Posted 23 May 2011 - 07:57 PM

Art Adams wrote a series of excellent articles for ProvideoCoalition on this very subject.

Click Here
  • 0


Glidecam

FJS International, LLC

rebotnix Technologies

Wooden Camera

CineTape

CineLab

Tai Audio

Opal

Visual Products

Media Blackout - Custom Cables and AKS

Broadcast Solutions Inc

Abel Cine

Aerial Filmworks

Metropolis Post

Technodolly

Paralinx LLC

Willys Widgets

Rig Wheels Passport

The Slider

Gamma Ray Digital Inc

Ritter Battery

Media Blackout - Custom Cables and AKS

Broadcast Solutions Inc

FJS International, LLC

rebotnix Technologies

Rig Wheels Passport

Aerial Filmworks

Metropolis Post

Gamma Ray Digital Inc

Technodolly

Ritter Battery

Glidecam

Willys Widgets

Abel Cine

Tai Audio

Wooden Camera

Paralinx LLC

Visual Products

CineLab

Opal

The Slider

CineTape