The Tiffen 81B Light Balancing Filter - Series 9helps to decrease the color temperature by 300K in order to warm the image slightly in order to match the color quality of illumination. When using an 81B filter, you will be able to attain 3200K balance when the prevailing light source is 3500K. The warming effect of this filter requires a 0.3-stop increase in exposure for normal results.

This filter is made using ColorCore technology, a process that involves laminating the filter substrate between 2 pieces of optical glass, grinding flat to a tolerance of 1/10,000th of an inch, and then mounting to precision metal rings. It is compatible with Series 9 filter holders.

Warming Light Balancing Filter    Less 300K to Convert 3500 to 3200K    Compatible with Series 9 Filter Holder    ColorCore Technology

Light balancing filter decreases color temperature and provides a warming effect.

Subtracts 300K in order to attain 3200K color balance from 3500K illumination.

Filter factor of 1.3 requires a 0.3-stop increase in exposure.

Related Questions and Answers

Q: 1. Hi, does the 43mm diameter filter also have a front thread?

A: Yes, this filter has a 43mm front thread if you wish to stack filters.

Q: 2. Does this filter have multi-coating?

A: Technically it is not a multi-coated filter. But is made up of layers that allow different amounts of infrared light to pass through the filter and hit the sensor.

Q: 3. Are these a good solution for using with Rokinon cine lens (which don’t have a filter thread to screw anything into)? Trying to work out how I use fixed ND and polarizer filters with the Rokinons without a matte box (when using on a gimbal).

A: It entirely depends on the Rokinon lens you are speaking of. Virtually all the Rokinon cine lenses take filters (on exception would be the 14mm) whereas the Rokinon Xeens cannot and you would most likely use this: NiSi 114mm Shatter-Proof Protector Filter B&H # NIR114EXP Generally on a gimbal, a matte box is not used and only one maybe two screw on filters would be considered for obvious size and weight issues. In order that we may further assist you, please write telling us in more detail of what you wish to do. sales@bhphoto.com.

Q: 4. My Tiffen 4x4 filters are not held tightly enough and tend to slip...can the filter tray be tightened?

A: Yes, just tighten the screws on the holder

Q: 5. Will this filter blurt water in seascapes

A: This is a 10 stop filter which only allows 1/1000th of all light to pass through it. This will enable you to do long exposures with your camera on top of a tripod... you can blur anything that moves, including streams, waterfalls, clouds, etc. Please note, this is the AXent version of our XLE filters which has no IR protection and is only recommended for B&W photography. When shooting this filter with today's digital cameras, the sensor will also pick up IR light during a long exposure which will cause a color shift and your photo will come out magenta or possibly green. To eliminate this, you need the XLE AdvantiX (some IR protection) or the XLE ApeX filter (full IR protection).

Q: 6. May I just buy the filter holder it self?? Or pair it up with a different size ring?

A: Yes you can, i bought filter holdet itself and paired it up with different rings

Q: 7. what neutral density filter can I use for a macro lens sp 90mm f/2.8di macro 1:1 by Tamron?

A: What is the filter thread diameter?

Q: 8. Can this fit on a Tokina Opera 16-28mm. I already have a 77mm tiffen nd filter. Will this be useful?

A: No but you can use this Fotodiox filter holder kit and use 145mm filters: https://bhpho.to/2YI0Md2

Q: 9. does it create a X in the final photo like some of the variable nd filters?

A: I have not encounter any X with this filter, love it for long exposure pictures. I only saw X on variable nd filters so far. I hope this helps.

Q: 10. does it create a X in the final photo like some of the variable nd filters?

A: Nope!