The Heliopan 39mm RG 645 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 39mm RG 645 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 645nm 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 645nm or Above Can Pass    Blocks Near-IR, Visible, and UV Light    ~8x Filter Factor, ~3 Stops    Schott Glass Construction    Multi-Coated    39mm 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 645nm to pass through
• Effective for infrared films or other media sensitive to infrared wavelengths 645nm 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 8x reduces exposure by about 3 stops
• Thin, brass filter ring helps to prevent vignetting, jamming, and provides additional strength
• 39mm front filter threads allow for use with other filters
• Plastic case for storage and transport

Related Questions and Answers

Q: 1. 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: 2. 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: 3. If used on another camera via an adapter, will it still have full manual control?

A: It depends on the adapter. Ask the adapter Co.

Q: 4. Is this lens compatible with the Pentax 645n medium format film camera?

A: The Pentax smc FA 645 33-55mm f/4.5 AL Lens is compatible with the Pentax 645N camera.

Q: 5. Does this lens work with a Pentax 645n camera?

A: Unfortunately no, the Pentax D FA 645 55mm lens was made for a 44x33mm image sensor which is smaller than 60x45mm film that is used in the 645N. The lens will not spread the light over the entire film plane in the 645N and would result in vignetting.

Q: 6. Is this lens compatible w/ the Hasselblad 907x ?

A: Pentax 645 mount is not compatible with the Hasselblad 907x without an adapter. To fit on the 907x without an adapter the lens needs to have a Hasselblad X mount.

Q: 7. Is this compatible with the Canon 5D Mark IV?

A: Unfortunately, no, the Vello FreeWave Viewer VL AV & Shutter Release Cable for Canon 6D, 7D, 5D Mark III, and 1D Mark IV, would not be compatible for use with the Canon EOS 5D Mark IV DSLR camera.

Q: 8. Will this work for t7i?

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

Q: 9. Would this work with a D5600?

A: This device is not compatible with the D5600.

Q: 10. may someone can tell me if this lens can work with AF on 645N II?

A: i think only pentax can answer this