The Heliopan 27mm RG 695 (89B) Infrared Filter corresponds to a Wratten 89B 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 27mm RG 695 (89B) 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 695nm 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 695nm or Above Can Pass    Blocks Near-IR, Visible, and UV Light    ~60x Filter Factor, ~6 Stops    Schott Glass Construction    Multi-Coated    27mm 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 695nm to pass through
• Effective for infrared films or other media sensitive to infrared wavelengths 695nm 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 60x reduces exposure by about 6 stops
• Thin, brass filter ring helps to prevent vignetting, jamming, and provides additional strength
• 27mm front filter threads allow for use with other filters
• Plastic case for storage and transport

Related Questions and Answers

Q: 1. If I use the accessory LH-FX27 lens hood, is there a cap that will work with that?

A: FUJIFILM LHCP-27 Lens Hood Cap https://bhpho.to/3AWnpst

Q: 2. Hello. Is this lens compatible with the X-T50 firmware? TYIA

A: Yes, the Voigtlander Ultron 27mm f/2.0 Lens (FUJIFILM X, Black) is compatible with the Fuji X-T50. Please note that this lens features a manual focus design.

Q: 3. If you're hitting the street with just this lens mounted on an XT-4 what's a good neoprene pouch to throw that setup into? I'd like a way to pocket a camera with this lens mounted.

A: OP/TECH USA Rangefinder Soft Pouch will fit your FUJIFILM X-T4 Mirrorless Digital Camera and FUJIFILM XF 27mm f/2.8 R WR Lens with caps, filters, and lens hood. Please review the link below to find this option. OP/TECH USA Rangefinder Soft Pouch BH #OPSPRB • MFR #7001224 https://www.bhphotovideo.com/c/product/222046-REG/OP_TECH_USA_7001224_Rangefinder_Soft_Pouch.html

Q: 4. Will this lens be all metal? (The previous mki had plastic).

A: The majority of the lens is metal including the mount, there is some plastic but mostly metal.

Q: 5. Will this lens work on an X-T3 ?

A: This lens would definitely work on an X-T3! Very compact setup.

Q: 6. will this lens bundle with the xs10??

A: As of yet the XS10 is not bundled with the 27mm lens, it may be in the future.

Q: 7. Can it use extension extension tubes?

A: You can use the Vello Deluxe Auto Focus Extension Tube Set for FUJIFILM X-Mount, Version II, BH # VEEXTFXD2 https://bhpho.to/3wEdmpN

Q: 8. I owned the original 27mm But one day it just died. When I went online to see if I could find out how to fix this problem, I found many people had their 27mm just stop working. Do you know if they fixed this problem with the new lens? It was a really great lens and gave wonderful results and did last for several years. It was the first lens I bought and even bought it from B&H before I bought the camera.

A: They did make quite a few improvements to the overall stability of this lens in terms of build quality and operation so you should get more longevity out of this lens when compared to the previous version.

Q: 9. I just noticed that my aperture ring will turn into the "A" position without pushing the lock button, but that I have to push the lock button to get it out of the "A" position. Is this normal? On my 18 1.4 and 33 1.4 I have to push the lock button to get into AND out of the "A" position.

A: Yes, the XF 27mm f/2.8 R WR seems to employ this new method of switching into electronic aperture control. Our copies of the lens also switch into "A" WITHOUT pressing the lock button, and require the lock button to switch out "A". This is unlike some of their other lenses, like the 10-24mm f/4 R WR OIS, and the ones you have listed.

Q: 10. Is this lens weather sealed?

A: The Voigtlander Ultron 27mm f/2.0 Lens is not weather sealed.