The Tiffen 2 x 2" 81EF Light Balancing Filter helps to decrease the color temperature by 650K in order to warm the image slightly in order to match the color quality of illumination. When using an 81EF filter, you will be able to attain 3200K balance when the prevailing light source is 3850K. The warming effect of this filter requires a 0.6-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 and grinding flat to a tolerance of 1/10,000th of an inch. It measures 2 x 2" / 50.8 x 50.8mm.

Warming Light Balancing Filter    Less 650K to Convert 3850 to 3200K    ColorCore Technology

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

Subtracts 650K in order to attain 3200K color balance from 3850K illumination.

Filter factor of 1.5 requires a 0.6-stop increase in exposure.

Related Questions and Answers

Q: 1. Is there a soft box that works with this product instead of using the umbrella?

A: Yes there is. Chimera makes a nice video softbox and speed ring (adapter ring to mount the softbox) that would work well with the light. See the links below for details:http://bhpho.to/ryfFJDhttp://bhpho.to/JzoWDG

Q: 2. Can this charge while shooting?

A: No, the Godox AD300pro is not designed to be charged while shooting. Its only charging method is with the external battery charger included with the AD300pro.

Q: 3. The specs note that the lowest ISO is 3 however, I've read a few reviews that state lowest ISO is 100. Can you confirm ISO goes lower than 100? My camera goes down to ISO 64 and want to make sure I can use that setting.

A: According to the manual, on page 34, it lists the ISO range from 3-8000. The choices you have are: 3, 4, 5, 6, 8, 10, 12, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 640, 800, 850, 1,000, 1,250, 1,600, 2,000, 2,500, 3,200, 4,000, 5,000, 6,400, 8,000

Q: 4. Will the cine mode work with a super 8 camera?

A: Yes it will calculate the light according to the frame rate

Q: 5. Can the Sekonic i-346 accurately measure the fc of a LED video lighting fixture?

A: Yes

Q: 6. Is the PC sync connector threaded?

A: It is not threaded.

Q: 7. What USB cord do I need for recharge?

A: Micro USB standard cellphone (Non-iPhone)

Q: 8. Would it be able to do a cordless setup with the new Godox XProS TTL Wireless Flash Trigger?

A: Handheld light meters measure light, therefore nothing to trigger. Regardless of the light brand or model, once you trigger the lights (via a wired or wireless transmitter) the Sekonic will give you a measurement. You will need to imput ISO and decide what kind of measurement you want, i.e. f stop or shutter speed. Set the Sekonic to read flash and place it in front of your subject with the dome aimed toward the light source. The display will show ISO, f stop and shutter speed once the flash has been triggered.

Q: 9. When metering in Cine mode, does this meter in T-stops?

A: No, the Sekonic L-308X-U Flashmate Light Meter does not display in T-stops

Q: 10. Does this meter have a count-down timer?

A: This meter does not have a count down timer.