The Heliopan Bay 3 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 Bay 3 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 brass filter ring for 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    Bay 3 Front Filter Mount    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
• Brass filter ring helps to prevent jamming and provides additional strength
• Bay 3 front mount allows use with other filters
• Plastic case for storage and transport

Related Questions and Answers

Q: 1. What is the best cable to use to connect to the displayport? Can you use a DVI cable with a displayport adaptor? If so, which one is recommended?

A: It all depends on the monitor, but if you wish to use a DVI monitor then an adapter cable such as that should work fine.

Q: 2. If a drive fails, can a user replace the drive and will it automatically bring it back in synch (assuming SoftRaid 5)?

A: Depending on the mechanism for RAID rebuild, yes, a user can replace the drive. Please be sure to consult the user guide/manual for the drive replacement and RAID rebuild procedure. Procedures can vary from RAID level used to manufacturer.

Q: 3. how do u check raid in this for bad sectors? i usually run apple disk utility and secure erase 2x on individ drives but what about RAIDS? i no see option for that on apple DUtility.

A: Apple Disk Utility should not be used with the OWC ThunderBay 4 4-Bay Thunderbolt 3 RAID Enclosure. You would need to use the free SoftRaid software to manage and maintain the unit.

Q: 4. Does this require Synology HDD's?? Or can I use a 3rd party like Iron Wolf?

A: You can fill this Synology DiskStation DS1823xs+ 8-Bay NAS Enclosure with Synology's drives, or other 3.5mm drives such as the Seagate IronWolf Pro, or WD Red Pro drives.

Q: 5. what is the warranty for this device (box AND drives)?

A: This product has a Limited 3-Year Warranty.

Q: 6. Can I configure my 4 hard drives so that one (my fastest) can be identified independent from the other 3? And then set up the older 3 to function as a single JBOD? Thank you for considering.

A: Yes, you can have one drive as an independent disk, then, from your comments, the other three set up as a RAID 0 array.

Q: 7. Which make/model drives come with this unit? I would like to know so that I can buy back up drives along with this unit incase one of them fails. Any recommendations for replacement drives? Thank you!

A: It is Toshiba 4tb

Q: 8. Is it possible to JBOD with the Thunder Bay 4?

A: Yes. That's all i do with it. You can buy without the soft raid i think.

Q: 9. My actual SR version is the 7, but I need to update to 8. How much free SoftRAID time do I get if I buy this unit?

A: The OWC ThunderBay 4 4-Bay Thunderbolt 3 RAID 5 Enclosure comes with a permanent version of SoftRAID.

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