The Heliopan 22.5mm 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 22.5mm 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    22.5mm 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 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
• 22.5mm front filter threads allow for use with other filters
• Plastic case for storage and transport

Related Questions and Answers

Q: 1. is this work with Nikon D7100 ?

A: It will work with any digital camera, however, you are most likely looking at a 20-30 second exposure at ISO200. This filter on a film camera with ISO 400 film is rated at 8-12 ISO so you will have to compensate accordingly. Also, all composition must be done prior to putting the filter on the lens as you will not be able to see once it is in place.

Q: 2. 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: 3. On an unmodified Canon R5 won’t cameras IR blocker stop this from working? Won’t it block 720nm from sensor?

A: Yes, therefore the Hoya 82mm R72 Infrared Filter is to be used with cameras that have been modified.

Q: 4. All of my filters are for 1.25 mm . My camera is a Canon T3 Rebel . Will this filter fit in my lenses (1.25 mm) or on my camera?

A: The Heliopan 30mm RG 1000 Infrared Filter will fit a lens with a 30mm diameter front

Q: 5. How much do you have to compensate for light loss?

A: The R72 drops you down approximately 5 to 7 stops.

Q: 6. will this work on my Nikon Z7ii? Nikor 24/70 2.8 lens

A: Yes, the Hoya 82mm R72 Infrared Filter works on both the Nikon F mount and Z mount versions of the Nikon 24-70mm f/2.8 Lens.

Q: 7. will this work on sony alpha cameras? i heard you need to modify the camera in order for this to work? I have a7s and a6500

A: I have not tried it on the camera.I have heard that you need to modify the filters on the sensor so that it only sees infrared light.The filter is very dark to the normal eye, but the film has no problem receiving the infrared. you would think that no light is getting through. Good like!

Q: 8. What size in millimetres is Series 7 or 8?

A: The diameter of this Heliopan Series 8 Infrared RG 715 (88A) Filter is 63.5mm, but this filter does lack threading.

Q: 9. Will this fit a PVS-14 objective lens?

A: This will not work with that Model.

Q: 10. I was planning on shooting both in color and B&W in raw format and was wondering what type of a result i will get in color mode?

A: A RAW color image shot with an infrared filter will produce a yellow/red image with blue foliage.