The Heliopan 25.5mm RG 665 Infrared Filter is designed to help capture images of how a subject reflects or transmits infrared light.

Infrared light waves occupy the space in the electromagnetic spectrum behind visible light due to their longer wavelengths. Many surfaces and materials react to, or emit infrared light waves differently than visible light waves, which provide the potential for photographs of subjects or subject properties that are otherwise invisible to the human eye. Such images require an infrared-sensitive medium such as infrared film or a digital photographic sensor which may be more effective when used without the infrared-blocking filters that are frequently built over them.

Conventional light sources such as the sun, photographic strobes, or incandescent lighting may be used to provide infrared illumination. However, because infrared films or digital photographic sensors can be more sensitive to the relatively higher energy and shorter-wavelength visible light those sources also emit, the effects of infrared light can be otherwise obscured. The Heliopan 25.5mm RG 665 Infrared Filter makes it possible to capture images of how subjects are illuminated by infrared light by blocking near-infrared, visible, and ultraviolet light waves while allowing 90% of infrared light waves 665nm or greater into the lens it is mounted onto.

This filter is constructed from Schott glass for increased optical clarity and features a thin brass filter ring to minimize the potential for vignetting while enhancing durability and jamming prevention.

For Infrared Images    90% of IR 665nm or Above Can Pass    Blocks Near-IR, Visible, and UV Light    ~30-40x Filter Factor, ~5.0-5.5 Stops    Schott Glass Construction    Multi-Coated    25.5mm Front Filter Threads    Thin, Brass Filter Ring    Plastic Case

• Designed for use with infrared film or digital camera sensors by filtering out near-infrared, visible, and ultraviolet light
• Allows 90% of infrared light waves beginning at 665nm to pass through
• Effective for infrared films or other media sensitive to infrared wavelengths 665nm or above
• Constructed from Schott glass for optical clarity
• Each glass surface includes four layers of anti-reflection coating to prevent internal ghosting and reflections
• Filter factor of approximately 30x to 40x reduces exposure by about 5.0 to 5.5 stops
• Thin, brass filter ring helps to prevent vignetting, jamming, and provides additional strength
• 25.5mm front filter threads allow for use with other filters
• Plastic case for storage and transport

Related Questions and Answers

Q: 1. does it come with the np-60 battery charger?

A: The Vello FreeWave Viewer VL Wireless Live View Remote includes an AC USB wall adapter and a USB cable. The batteries are charged while in the unit. The transmitter and receiver are charged separately.

Q: 2. Will this work as a wireless live view remote on the Canon 6DII?

A: I'm sorry, no.

Q: 3. What is the latency (delay) on the remote? Is this suitable for fast action photography, like birds flying off a perch?

A: As far as we know there is no delay.

Q: 4. Does the camera mirror have to be locked up to use the "viewer"?

A: When activating the live view function, the mirror will rise up and stay up automatically until the clip being recorded is complete or the camera runs out of power.

Q: 5. Will this work with Canon 60?

A: This will work with the Canon 60D.

Q: 6. Will this work for the t7i?

A: Yes: the Vello FreeWave Viewer VL Wireless Live View Remote Kit will work with the Canon T7i.

Q: 7. The specifications say SDI input. Does this device support 3G-SDI?

A: YES.

Q: 8. Will this work with the Nikon D4 ?

A: No, unfortunately this is not compatible with the Nikon D4 camera.

Q: 9. Will this work for the Canon D7 Mark II? Thanks

A: I learned too late that it does not currently work with the 7D Mk II. Previous models of the Canon cameras use a mini USB to transfer the video, but the 7D uses a micro USB. B&H said the do not currently have a cable that will fit that configuration. Kudos to B&H for prompt phone service and a full refund.

Q: 10. will this work with Canon 60D?

A: The transmitter is only going to work with the Canon 6D, 7D, 5D Mark III, & 1D Mark IV.