The Heliopan 55mm 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 55mm 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    55mm 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
• 55mm front filter threads allow for use with other filters
• Plastic case for storage and transport

Related Questions and Answers

Q: 1. is this a USA warranty?

A: Hello Lucius, yes all units sold in the US come with a US warranty.

Q: 2. Why choose this over the Sigma 60mm DN (ART) lens?

A: The Sigma 60mm is for APS-C sensors like the a6000. Its a good lens, but nothing like the 55mm f1.8 Zeiss, which is FE (for full-frame sensors) and works with all Sony's A7 series cameras.

Q: 3. Is the ring on the lease a focus ring or a zoom ring? And if its a focus ring, is there any way of setting it into a zoom ring on the Sony A7?

A: This is a prime lens. It is only 55mm nothing else. So the focus ring is only a focus ring. Since this lens has only one focal length it stays and always will stay at 55mm. It is an excellent prime lens. If you want sharp. This is the lens to get. If you want a multiple focal lengths (zoom) in a lens you need to find another lens.

Q: 4. Will this lens work with the 1st generation Canon 7D?

A: Hi--this lens is compatible with any Canon 7D camera.

Q: 5. does this lens have image stabilization?

A: Hi Marjorie, no. This lens doesn't have a built-in optical steady shot (image stabilization). -Anthony

Q: 6. In one review video, a guy showed an interesting front protector for this lens - a 49mm filter adapter whose outer diameter is exactly the same as the diameter of the lens body. It was some kind of vintage thing that is no longer in production. Any idea what kind of modern adapter might serve this purpose?

A: We don't have such a device--we only have 49mm protective filters for this lens.

Q: 7. Which country is this lens manufactured in?

A: According to the information we have, our current inventory's Country of Origin is Thailand. Please be aware this can change over the product's production life without notice.

Q: 8. Is there any good variable nd filter for this size?

A: Hello any 49mm filter will work with this lens.

Q: 9. Would this lens, compared to the Sony FE 50mm f/1.8 Lens be overkill for photographing artwork on a tripod? I'm getting a Sony a7RII for copy work and am not sure which of these two lenses would be the best deal with it.

A: This is one of Sony sharpest lenses for Sony full frame mirrorless cameras. The 50mm f1.8 have a basic optical quality and can not be compare with Sony Sonnar T* FE 55mm f/1.8 ZA Lens. Your camera A7R II will benefit a lot more if you use the 55mm f1.8 lens because the it can transmite a lot more details and a higher dynamic range.

Q: 10. Does it work on Canon EOS 60D?

A: Yes the Canon EF-S 18-55mm f/4-5.6 IS STM Lens is fully compatible with the 60D.