The near infrared digital camerais a near-infrared to infrared control filter that is designed for digital cinematography. Many digital motion-picture cameras are designed to maximize their ability to capture red hues, and in that process near-infrared or infrared contamination may occur. If the proportion of near-infrared or infrared light that reaches the sensor of a digital cinematography camera becomes too great, the results can show unwanted color shifts, particularly in dark areas of the frame such as shadows where the appearance of black is dominant.

When the Tiffen 77mm T1/2 IR Filter is used, near-infrared light waves beginning at 680nm are blocked by approximately 45%. Infrared light waves at higher frequencies are further impeded until nearly flat attenuation is achieved at 775 to 800nm. This process helps to ensure that the light that falls on the camera's sensor is limited to the visible spectrum. Potential near-infrared or infrared color shifts are prevented or minimized, which preserves color accuracy throughout the frame. While a Tiffen T1/2 IR Filter is sufficient for many cameras, others may have sensors that require a higher degree of near-infrared and infrared control, such as that provided by a Tiffen T1 IR Filter.

This filter is constructed from Water White glass for increased clarity as well as color fidelity. It 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.

Infrared Control Filter    For Digital Cinematography    Blocks Near-IR to Infrared, 680 to 800nm    1.41x Filter Factor, 0.5 Stop    Prevents Near-IR and IR Light Pollution    Maintains Appearance of Dark Areas    Helps Preserve Color Accuracy    Water White Glass Construction    ColorCore Technology    Plastic Case

• Designed for use with CCD or CMOS sensors to filter out near-infrared and infrared light pollution that cause color shifts frequently associated with high-definition recording
• Blocks near-infrared light waves beginning at 680nm by approximately 45% until nearly flat infrared attenuation is achieved at 775 to 800nm
• Constructed from Water White glass for increased optical clarity
• No dichroic coatings to further ensure color accuracy
• 1.41x filter factor reduces exposure by 0.5 stops
• Thin filter ring helps to prevent vignetting
• Plastic filter case for storage and transport

  Related Questions and Answers

  Q: 1. Could you use this in a 5.1 channel surround sound system or is this more for a 2 channel stereo system?

  A: These speakers are designed for installation in a commercial space such as a restaurant, pool, waiting area, etc. for background music and paging. They would not be ideal for use in a home theater or studio monitoring setting and require special wiring and a 70v installation amplifier.

  Q: 2. battery life ?

  A: Long lasting, non-changeable battery.

  Q: 3. Could you use this on a home stereo?

  A: Yes, you can use the Bogen Armadillo speaker with a home stereo. It is suitable for playing music.

  Q: 4. Could you use this with onkyo and sony av receivers ?

  A: The Bogen A6BLK NEAR A Series Armadillo Speaker can be used with audio amplification components that provide an 8-ohm, 150W power output specification or similar, as well as 70V amplifiers that provide at least 32W of powered output to the speakers. It is possible that this speaker could be used with specific Onkyo and Sony AV receivers that provide powered speaker outputs with similar specifications.

  Q: 5. Can you replace the battery in it ?

  A: The battery is not replaceable. The instruction sheet that comes packed with the remote states that.

  Q: 6. Will this remote work through a glass window?

  A: Yes if it is in line of sight at around 15 to 20 feet distance

  Q: 7. Hi, I have a Zeiss 35mm biogon lens that I use most of the time which requires a 43mm filter. The problem is I cant find a 43mm R72 infrared filter. Would it be possible to use the 46mm?

  A: With a step up ring from 43 to 46mm, you shouldn't have any problems. You generally do not experience vignetting (the dark corners) above around 24mms.

  Q: 8. My cable box has a port that reads IR. I presume that I may plug this into that port so I can place the cable box out of sight?

  A: It's difficult to predict how well any ir extender will work in a particular situation. Lights can be a factor. Kopul intends this transmitter and receiver kit to be used with a switch like this: Kopul HDMI Switcher 4 x 1 B&H # KOHDSW2041 MFR # HDSW-2041. You may be able to use something like this: Kramer 3.5mm to Single IR Emitter Cable (10') B&H # KRCA35MIRE10 MFR # C-A35M/IRE-10

  Q: 9. Hi! What range could you reasonably expect this to work out to? I have the older remote that came with my Pentax K-5, and it only works out to about 10-15'.

  A: Like the other Pentax infrared remotes, performance depends heavily on ambient light conditions. Outdoors in bright sunlight you should not expect more than 15 ft, depending on sun direction. Indoors or int dark conditions, 25-30 feet is reasonable.

  Q: 10. What are its dimensions?

  A: 2 x 1 x .3 inches.