The Tiffen 4 x 5.65" T1/2 IR Filter is 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 4 x 5.65" 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.

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    Padded Pouch

• 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
• Padded pouch included for storage and transport

  Related Questions and Answers

  Q: 1. Does this card support jumbo frame? If it does, what is the max frame rate?

  A: This model does support jumbo frame, however the manufacturer has not specified the max frame rate, which would also depend highly on resolution.

  Q: 2. Are the instructions in English?

  A: Yes the instructions are in English https://bhpho.to/2W5MFsC.

  Q: 3. Does this lens come with a hard case in the box?

  A: Mitakon Zhongyi Speedmaster S35 20mm T1 Cine Lens (Nikon Z) comes on a hard leather case with internal customized hard foam.

  Q: 4. Can the battery be replaced by the user?

  A: Yes, the battery is user replaceable.

  Q: 5. How sharp is this lens full opened?

  A: When you have it wide open (T1-1.4) it will feel more like a vintage lens. It will be ok in terms of sharpness and have low contrast. Around T2 you will notice that it will get more contrast and get sharper. The lens performs its best in regards to sharpness and contrast between T4 and T5.6.

  Q: 6. WILL THIS ALSO FIT THE NEW Fujifilm X-T2 ?

  A: I asked Fujifilm (the technical department). They told me that each model is specific in terms of the functioning of the battery grips.

  Q: 7. is everything showing included with this gimbal? the whole assembly?

  A: This product is for a 4th axis only, it does not come with an entire gimbal. It is just the 4th axis for select systems like the H2, H2-45 and T1 Gimbals from Pilotfly.

  Q: 8. What focal length would it be on the BMPCC 4k?

  A: The Mitakon Zhongyi 17mm T1 Speedmaster Cine Lens (MFT) will be 17mm on the Blackmagic Design Pocket Cinema Camera 4K. If curious about the crop factor compared to a full-frame sensor, it will be 30mm.

  Q: 9. What is the warranty on this lens?

  A: Yes, Limited 5-Year Warranty.

  Q: 10. Does this battery grip fit the X-T3?

  A: Unfortunately, the BG-F1 does not fit the X-T3. The proper battery grip is the FUJIFILM VG-XT3 Vertical Battery Grip, B&H # FUXT3VBG. https://bhpho.to/34dWxDb